A mod­ern gas boil­er, in addi­tion to the main fuel, also needs elec­tric­i­ty. Sev­er­al mod­ules are pow­ered from it at once: a con­trol board, a cir­cu­la­tion pump, an igni­tion mod­ule, ven­ti­la­tion and a GMS unit for remote con­trol. For all this to work even dur­ing pow­er out­ages, autonomous sources are required, but a sharp tran­si­tion to them neg­a­tive­ly affects the oper­a­tion of the device. In par­tic­u­lar, when the sinu­soid changes, the elec­tron­ic board often burns, which is almost the most expen­sive unit in the entire sys­tem. To pre­vent this from hap­pen­ing, it is nec­es­sary to install an unin­ter­rupt­ible pow­er sup­ply, which not only trans­fers the sys­tem to an inde­pen­dent mode, but also pro­tects it. And our arti­cle will tell you how to choose this device and what nuances to pay atten­tion to.

  1. Prin­ci­ple of oper­a­tion
  2. Pow­er
  3. Bat­tery capac­i­ty
  4. Switch­ing speed
  5. Wave­form
  6. Bat­tery charg­ing time
  7. Addi­tion­al pro­tec­tion
  8. Con­nec­tors
  9. Func­tion­al
  10. Top Brands
The best UPS for a gas boil­er
one UPS Ener­gy 600 Best price offer
2 ELTENA (INELT) One Sta­tion 600 Com­pact 600 Watt UPS
3 EAST EA901PS Con­tin­u­ous UPS with capac­i­ty expan­sion
four CROWN MICRO CMU-1000X The best stand­by UPS with high build qual­i­ty
5 Ippon Inno­va G2 3000 Pow­er­ful Dou­ble Con­vert­er UPS

Principle of operation

Which type of UPS is best for a gas heater?

There are three types of unin­ter­rupt­ible pow­er sup­ply: con­tin­u­ous, inter­ac­tive and stand­by. Offline and Online mark­ings are also often found, which to some extent explains the dif­fer­ence between them.


The UPS is an inter­me­di­ary between the net­work and the built-in bat­tery. It does not change the input volt­age and most often does not con­trol it at all. The device turns on only when the cur­rent goes beyond the set range, for exam­ple, when it falls below the set mark or when it com­plete­ly dis­ap­pears. This is the most bud­get option that does not pro­duce noise and does not take up much space. But if the issue of sav­ing is not in the first place, it is bet­ter to refuse it. Such a device is capa­ble of pro­vid­ing ener­gy only for a few min­utes and does not have the abil­i­ty to man­u­al­ly adjust the cur­rent and oth­er char­ac­ter­is­tics.


the source is the next step in the devel­op­ment of the UPS. It ana­lyzes the incom­ing volt­age and reacts to the slight­est fluc­tu­a­tions in the net­work. UPSs work as sta­bi­liz­ers, and when switch­ing to an autonomous source, they do it very quick­ly and with­out chang­ing the sinu­soid. This prin­ci­ple of oper­a­tion sig­nif­i­cant­ly increas­es the ser­vice life of the gas boil­er board, which does not like vibra­tions. The inter­ac­tive unin­ter­rupt­ible pow­er sup­ply nor­mal­izes all para­me­ters and brings them to the opti­mal val­ue.


UPS is con­sid­ered the best for gas heaters. With them, pow­er always comes from bat­ter­ies, which the UPS con­stant­ly charges when there is cur­rent in the net­work. This allows you not to waste resources on adjust­ing the sinu­soid dur­ing the tran­si­tion and reduces the time for switch­ing between modes to zero. Of the short­com­ings, increased noise and the high­est pos­si­ble price tag stand out here.

TOP 10 best UPS for gas boilers

Under the UPS for a gas boil­er, as a rule, they raise a line-inter­ac­tive unin­ter­rupt­ible pow­er sup­ply with an exter­nal or built-in bat­tery. This is an invert­er com­bi­na­tion with an addi­tion­al bat­tery sup­ply, which ensures con­tin­u­ous oper­a­tion and volt­age sta­bi­liza­tion, even if it “jumps” or is tem­porar­i­ly turned off.

Many gas boil­ers are volatile — they need a round-the-clock con­nec­tion to the net­work. In the absence of elec­tric­i­ty, the equip­ment can­not func­tion, respec­tive­ly, the heat­ing sys­tem cools down, and in win­ter it can com­plete­ly freeze and burst. UPS of var­i­ous types — inter­ac­tive, with dou­ble con­ver­sion, are designed to ensure the unin­ter­rupt­ed oper­a­tion of house­hold sys­tems and pre­vent emer­gen­cies caused by over­loads and short cir­cuits.

The TOP-10 from our edi­tors includes the best UPS for the boil­er in terms of price and qual­i­ty. These are good, reli­able mod­els from trust­ed man­u­fac­tur­ers that have col­lect­ed the most pos­i­tive reviews.

Powerman Online 1000 Plus

To pro­tect expen­sive heat­ing equip­ment from pow­er out­ages, a reli­able dou­ble con­ver­sion device is the best solu­tion. A pow­er­ful mod­el from the ONLINE line works with an exter­nal bat­tery, the capac­i­ty of which users choose based on per­son­al needs. In the event of long out­ages, even bat­ter­ies up to 100 Ah can be installed, which allows you to achieve max­i­mum auton­o­my. The range of UPS set­tings is also impres­sive, here it is pos­si­ble to adjust all out­put para­me­ters, which great­ly expands the scope of its appli­ca­tion.


  • volt­age range 115–295 V;
  • jus­ti­fied price tag;
  • min­i­mal offline devi­a­tions;
  • eco mode;
  • ease of set­up;
  • reli­able over­load pro­tec­tion;
  • USB port.


  • noisy work
  • con­fus­ing instruc­tions.

Energy Garant 500

Energy Garant 500

For the safe oper­a­tion of volatile devices, many users choose prod­ucts of the Russ­ian brand Ener­gia. Like the entire Garant line, this mod­el is used with an exter­nal bat­tery, which sim­pli­fies their replace­ment and allows you to assem­ble a bat­tery of the required capac­i­ty. In terms of reli­a­bil­i­ty, the UPS is not infe­ri­or and even sur­pass­es many for­eign ana­logues. And after the update, it also becomes a leader in terms of econ­o­my in idle mode, due to the mod­i­fied cir­cuit­ry. But the key advan­tage of the UPS was the abil­i­ty to install it to con­nect the boil­er in an unheat­ed room, because the man­u­fac­tur­er allows oper­a­tion at low tem­per­a­tures.


  • sim­ple bat­tery replace­ment;
  • charg­ing speed;
  • oper­a­tion at sub-zero tem­per­a­tures;
  • infor­ma­tive LED dis­play;
  • invert­er mode.


  • noisy cool­ing.

Stark Country 1000 Online

One of the best unin­ter­rupt­ible pow­er sup­plies is notable for its dou­ble con­ver­sion and always-on bat­ter­ies. A fair­ly com­plex cir­cuit increas­es pow­er con­sump­tion, but it was she who allowed the man­u­fac­tur­er to achieve the ide­al out­put volt­age. In addi­tion, this solu­tion made it pos­si­ble to get rid of delays when switch­ing to offline mode and vice ver­sa, and reduce the adjust­ment error to 1%. Accord­ing to cus­tomer reviews, the UPS can simul­ta­ne­ous­ly pow­er not only the boil­er, but also oth­er impor­tant con­sumers. For exam­ple, pumps that ensure the move­ment of water in the heat­ing main, or com­put­er equip­ment.


  • copes even with sig­nif­i­cant pow­er surges;
  • dou­ble con­ver­sion;
  • sta­ble out­put volt­age;
  • built-in bypass;
  • zero tran­si­tion time between modes;
  • sta­bi­liz­er.


  • the ser­vice life of the includ­ed bat­ter­ies;
  • not eco­nom­i­cal.

Energy Pro 1700

Energy Pro 1700

A func­tion­al and high-qual­i­ty unin­ter­rupt­ible pow­er sup­ply for a heat­ing boil­er will pro­tect even the most sen­si­tive equip­ment from mal­func­tions. As evi­denced by the reviews, the built-in dig­i­tal PWM mod­ule and sta­bi­liz­er lev­el out sig­nif­i­cant draw­downs and surges in the pow­er sup­ply net­work with high accu­ra­cy. The UPS con­tin­ues to func­tion sta­bly at 10% devi­a­tions in any direc­tion, with­out using the bat­ter­ies, there­by extend­ing their life. For this rea­son, the UPS will be the best choice for the pri­vate sec­tor, where such neg­a­tive fac­tors are not uncom­mon.


  • high rat­ed pow­er;
  • the abil­i­ty to use car bat­ter­ies;
  • sta­ble oper­a­tion with sig­nif­i­cant devi­a­tions;
  • reli­a­bil­i­ty and prac­ti­cal­i­ty;
  • long ser­vice life;
  • pow­er sav­ing mode.




The pop­u­lar brand pro­duces a wide range of UPS with bat­tery back­up. But it is the UBP-1000 mod­el, accord­ing to cus­tomer reviews, that has opti­mal tech­ni­cal char­ac­ter­is­tics. Hid­den under a com­pact body, a reli­able fill­ing ensures a long ser­vice life for con­nect­ed volatile devices, includ­ing sen­si­tive heat­ing boil­ers. To increase the bat­tery life, it is pos­si­ble to con­nect two bat­ter­ies in series. The “cold start” func­tion allows you to start the unin­ter­rupt­ible pow­er sup­ply even with­out apply­ing volt­age to it at the touch of a but­ton.


  • com­pact­ness and low weight;
  • reli­able man­u­fac­tur­er;
  • an excel­lent com­bi­na­tion of price-oppor­tu­ni­ty;
  • input volt­age fil­ter;
  • sta­ble out­put volt­age;
  • qui­et oper­a­tion of the cool­er;
  • bat­tery capac­i­ty up to 100 Ah.


  • only one out­put sock­et.


To con­nect the boil­er, it is not always advis­able to use a high-pow­er unin­ter­rupt­ible pow­er sup­ply. Espe­cial­ly if in the future it is not planned to pow­er oth­er con­sumers from it. This mod­el is suit­able for just such a case. The mod­est out­put para­me­ters are com­pen­sat­ed by the high qual­i­ty of work­man­ship and reli­a­bil­i­ty of the device. The UPS is very com­pact, thanks to which, accord­ing to cus­tomer reviews, there will be no prob­lems with place­ment even in a small room. Micro­proces­sor con­trol pro­vides the best out­put volt­age and pro­tects against net­work draw­downs.


  • high resource and reli­a­bil­i­ty.
  • mod­ern design;
  • infor­ma­tive mon­i­tor;
  • the pos­si­bil­i­ty of com­bin­ing bat­ter­ies;
  • com­pact body.


  • noise dur­ing oper­a­tion is high­er than stat­ed.

Hiden Control HPS20-0412

A pow­er­ful inter­ac­tive unin­ter­rupt­ible switch is designed tak­ing into account the specifics of the oper­a­tion of cir­cu­la­tion pumps in heat­ing sys­tems. There­fore, it is bet­ter than ana­logues suit­able for gas boil­ers. This reli­able device has become one of the most pop­u­lar thanks to a good pow­er reserve, the abil­i­ty to replace bat­ter­ies and install addi­tion­al bat­ter­ies. The mod­el is equipped with over­load and short cir­cuit pro­tec­tion sys­tems, which increas­es the ser­vice life of both the UPS itself and the heat­ing equip­ment. Buy­ers unan­i­mous­ly rec­om­mend it for pur­chase, not­ing the sta­bil­i­ty, good build qual­i­ty and mate­ri­als.


  • cold start;
  • afford­able price;
  • the pos­si­bil­i­ty of installing addi­tion­al bat­ter­ies;
  • flex­i­ble set­tings;
  • well-devel­oped pro­tec­tive func­tions;
  • soft­ware set­ting of cur­rent, charg­er pro­file;
  • qual­i­ty assem­bly.




An inex­pen­sive but good unin­ter­rupt­ible pow­er sup­ply for a gas boil­er was includ­ed in our rat­ing for charg­ing speed and long bat­tery life. The mod­el is reli­able, high-qual­i­ty and ful­ly com­plies with the spec­i­fied char­ac­ter­is­tics. It is ide­al for con­nect­ing cir­cu­la­tion pumps as part of heat­ing sys­tems, sol­id fuel boil­ers, as well as oth­er house­hold appli­ances with a pow­er of up to 100 W. The UPS is sup­plied with­out a bat­tery, but the bat­tery is remov­able here, plus you can install an addi­tion­al mod­ule to increase the time of con­tin­u­ous oper­a­tion dur­ing a pow­er out­age. Accord­ing to reviews, the unin­ter­rupt­ible pow­er sup­ply is very easy to use, reli­able and main­tain­able, which is rare in this price seg­ment. Plus added the abil­i­ty to mount to the wall.


  • main­tain­abil­i­ty;
  • instal­la­tion of addi­tion­al bat­ter­ies;
  • ease of con­nec­tion and con­fig­u­ra­tion;
  • can be mount­ed on the wall;
  • low noise lev­el;
  • suit­able for boil­ers and oth­er equip­ment.


  • short stock wires.

Hiden Control HPS20-0312

Accord­ing to buy­ers, this is the best UPS for the boil­er in terms of price and qual­i­ty. A clean and sta­ble sinu­soid allows you to con­nect any boil­ers with cir­cu­la­tion pumps. The cur­rent charge can be select­ed pro­gram­mat­i­cal­ly, which makes it pos­si­ble to con­nect bat­ter­ies of any capac­i­ty with­out the threat of overdis­charge. All infor­ma­tion about the oper­a­tion of the device is dis­played on a bright LCD dis­play, in addi­tion there is a sound sig­nal of events. An unin­ter­rupt­ible pow­er sup­ply is great for house­hold gas boil­ers, but it is not uni­ver­sal — it is not rec­om­mend­ed to take it for simul­ta­ne­ous feed­ing of pre­ci­sion equip­ment due to a sharp volt­age cor­rec­tion dur­ing drops. Sup­plied with­out bat­tery.


  • inex­pen­sive;
  • flex­i­ble charge and bat­tery pro­file set­tings;
  • cold start;
  • pure sine wave out­put;
  • reli­able pro­tec­tive func­tions;
  • avail­abil­i­ty of all pro­tec­tive func­tions.


  • abrupt volt­age cor­rec­tion.

Ecovolt Smart 312

An excel­lent unin­ter­rupt­ible pow­er sup­ply of the Smart series pro­duces a pure sine wave and, most impor­tant­ly, is sta­ble in oper­a­tion. The extend­ed mains volt­age range has sig­nif­i­cant­ly increased the bat­tery life, because the device does not switch to bat­tery mode at the slight­est drop. The main boards are made using SMD tech­nol­o­gy, which makes the UPS com­pact, light­weight, and the exter­nal case has an attrac­tive design. The built-in sta­bi­liz­er ful­ly com­plies with GOST stan­dards, the mod­el itself is equipped with com­pre­hen­sive pro­tec­tion for cur­rent, tem­per­a­ture, volt­age. Accord­ing to reviews, the bud­get unin­ter­rupt­ible pow­er sup­ply flaw­less­ly copes with the work and has no crit­i­cal com­plaints. Its sub­jec­tive draw­back is a notice­able noise dur­ing oper­a­tion, how­ev­er, it does not exceed the declared fig­ure.


  • restora­tion of the lost capac­i­ty of the bat­tery due to the desul­fa­tion of the plates;
  • clear reg­u­la­tion of the charg­ing process;
  • wide volt­age range;
  • con­ve­nient form fac­tor — the UPS is light and com­pact;
  • sta­ble at work.


  • makes a lit­tle noise.


How to cor­rect­ly cal­cu­late the pow­er of the UPS?
There is a com­mon mis­con­cep­tion that the pow­er of the UPS should be the same as the total pow­er of all boil­er mod­ules. This is not true. Start­ing cur­rents are much high­er than lin­ear ones. For exam­ple, if you have a pump with a nom­i­nal val­ue of 300 watts, then at the time of start­up it will con­sume approx­i­mate­ly 500 watts. Such a jump appears very quick­ly and dis­ap­pears just as quick­ly, but if the unin­ter­rupt­ible pow­er sup­ply does not have an appro­pri­ate reserve, this will neg­a­tive­ly affect both its oper­a­tion and the life of the boil­er’s elec­tron­ic mod­ules. Some experts advise tak­ing devices whose pow­er is three times the nom­i­nal require­ments of the boil­er, but this is already too much. Dou­bling the dig­its is enough here.

Sim­ply put, if your gas boil­er con­sumes 1 kilo­watt, then the UPS should be 2 kilo­watts or a lit­tle more, but not less.


The best standby UPS with high build quality

Back­up type unin­ter­rupt­ible pow­er sup­ply that can be installed on a small gas boil­er. A smooth tran­si­tion to autonomous pow­er and sev­er­al degrees of pro­tec­tion will keep your elec­tron­ic board from chang­ing the sinu­soid, and the built-in sta­bi­liz­er will not allow ener­gy surges to burn sen­si­tive mod­ules.Rat­ing mem­ber:
15 Best Unin­ter­rupt­ible Pow­er Sup­plies (UPS)

Battery capacity

How long will the UPS run offline?

If your home has autonomous pow­er, and the UPS is used only to switch the net­work to it, you can safe­ly skip this tip. It applies only to those devices that are equipped with their own bat­ter­ies, from which your gas boil­er will work dur­ing pow­er out­ages.

It is easy to guess that the high­er the bat­tery capac­i­ty, the longer the heat­ing will be in the house, and this is an indis­putable fact. In the descrip­tion of each unit there is an indi­ca­tion of how long it will work at full load. In the cheap­est mod­els, this is a few min­utes. In more expen­sive ones — up to a cou­ple of hours. It’s not worth wait­ing for more. There are also mod­els with the pos­si­bil­i­ty of expand­ing the capac­i­ty. They just need to buy a bat­tery and con­nect it to the device, there­by increas­ing auton­o­my.

How to choose a UPS for a heating boiler

The main para­me­ters that you should pay atten­tion to when choos­ing a UPS for a gas boil­er:

  1. Device type. Inter­ac­tive mod­els are sen­si­tive to input volt­age and switch to bat­tery mode at the slight­est drop. They are worth tak­ing if the instal­la­tion of a gen­er­a­tor is not planned in the future. In all oth­er cas­es, experts rec­om­mend pur­chas­ing mod­els with a dual con­vert­er.
  2. out­put pow­er. It should be enough to ser­vice equip­ment, while the min­i­mum indi­ca­tor is usu­al­ly mul­ti­plied by a fac­tor of 1.2 to cre­ate a small mar­gin of 10–20%.
  3. Bat­tery capac­i­ty – it deter­mines the bat­tery life in the event of a com­plete pow­er out­age.

When choos­ing one mod­el from two sim­i­lar ones, it is bet­ter to pur­chase a device with the abil­i­ty to install addi­tion­al bat­ter­ies.

It is also worth pay­ing atten­tion to the brand. It is bet­ter to pur­chase equip­ment from trust­ed com­pa­nies that ful­ly ser­vice their equip­ment dur­ing the war­ran­ty peri­od and after it.

Switching speed

How quick­ly will the UPS change mode?
If you decid­ed from the very begin­ning to choose a con­tin­u­ous UPS, you do not need this advice. The fact is that back­up and inter­ac­tive sources are pow­ered from the net­work, and at the time of a pow­er out­age they switch to bat­ter­ies. It takes time, and the less time, the bet­ter. The valid range is 3 to 10 mil­lisec­onds. True, this para­me­ter great­ly affects the price of the device. But it should be under­stood that even the small­est gap in the cur­rent sup­ply neg­a­tive­ly affects sen­si­tive elec­tron­ics. That is why the best option is a con­tin­u­ous UPS, which always runs on bat­ter­ies that are con­stant­ly being charged. It does not have a switch at all, it just stops charg­ing the bat­tery at the moment of a pow­er out­age.


Continuous UPS with capacity expansion

Unin­ter­rupt­ible pow­er sup­ply with two bat­ter­ies on board and spe­cial expan­sion slots. If the ini­tial bat­tery capac­i­ty is not enough for you due to long pow­er out­ages, you just need to buy a cou­ple more bat­ter­ies and dou­ble the source’s auton­o­my.Rat­ing mem­ber:
15 Best Unin­ter­rupt­ible Pow­er Sup­plies (UPS)

UPS types

Experts clas­si­fy unin­ter­rupt­ible cur­rent sup­ply devices for heat­ing sys­tems into sev­er­al cat­e­gories depend­ing on the prin­ci­ple of oper­a­tion, type of instal­la­tion and the avail­abil­i­ty of addi­tion­al options.

But since the main nuance in choos­ing a device is pre­cise­ly the tech­ni­cal char­ac­ter­is­tics, the fol­low­ing types of UPS are most often dis­tin­guished:

  • reg­u­lar or reserve. They are also called offline devices. Such devices pro­vide back­up pow­er and become nec­es­sary in the event of a pow­er out­age. The advan­tages of such devices include low price, com­pact­ness, the abil­i­ty to install on a wall or put on the floor. But the dis­ad­van­tages include lim­it­ed func­tion­al­i­ty, in par­tic­u­lar, back­up mod­els do not sta­bi­lize the volt­age of the elec­tric cur­rent.
  • with sta­bi­liz­er. AVR sta­bi­liz­er device is char­ac­ter­ized by the pres­ence of a volt­age rec­ti­fi­er, how­ev­er, it is basic, the sim­plest. The bat­tery capac­i­ty is small, the reserve of the device is only enough for 20 min­utes of oper­a­tion of the boil­er when the pow­er is turned off. But it is pos­si­ble to con­nect an addi­tion­al bat­tery (exter­nal), in which case the pow­er will increase, and the device will pro­vide up to 10 hours of oper­a­tion with­out pow­er sup­ply.
  • Online sys­tems. This is a mod­ern solu­tion in the issue of volt­age sta­bi­liza­tion and are con­sid­ered the most reli­able mod­els. A dou­ble con­vert­er, con­sist­ing of an invert­er, bat­ter­ies and a pow­er sup­ply, con­verts AC to DC, and then back to AC, but dur­ing pro­cess­ing, the device makes the cur­rent sta­ble. When the pow­er is turned off, the unin­ter­rupt­ible pow­er sup­ply sys­tem runs on bat­ter­ies and con­tin­ues to ensure effi­cient oper­a­tion of the heat­ing unit for a long time.


What type of sinu­soid is the most opti­mal for a gas boil­er?

The out­put sig­nal is in the form of a sinu­soid, and the smoother it is, the bet­ter for the pow­ered device. A sinu­soid devi­at­ed from the norm by 8% or more is called approx­i­mate, that is, incor­rect.

An approx­i­mate sinu­soid may also be referred to as mod­i­fied or qua­si. If any of these names are in the descrip­tion of the UPS, then it uses the “wrong” sig­nal, which may adverse­ly affect the oper­a­tion of the boil­er.

Bring­ing the sinu­soid to nor­mal requires the com­pli­ca­tion of the UPS and, as a result, its rise in price. Note that con­tin­u­ous or online sources are devoid of such a prob­lem, which once again speaks of the ratio­nal­i­ty of their use. But even among inter­ac­tive and back­up devices, there are mod­els with a smooth sig­nal. A strong change in the sinu­soid can lead to the inabil­i­ty to start the sys­tem or even to the fail­ure of some par­tic­u­lar­ly sen­si­tive mod­ules.

UPS Energy 600

Best price offer

Low cost 600 watt UPS with 1 mil­lisec­ond switchover speed. Two bat­ter­ies are designed for half an hour, and a full charge takes only 45 min­utes. An excel­lent solu­tion for your mon­ey, which has addi­tion­al­ly sev­er­al degrees of pro­tec­tion against over­loads and its own ener­gy sta­bi­liz­er.Rat­ing mem­ber:
15 Best Unin­ter­rupt­ible Pow­er Sup­plies (UPS)

Which uninterruptible power supply is better to buy

In addi­tion to choos­ing a mod­el accord­ing to tech­ni­cal para­me­ters and a man­u­fac­tur­er, it is impor­tant to get to know the addi­tion­al func­tion­al­i­ty bet­ter. Mod­ern UPSs have become so “advanced” that, in addi­tion to the main options, they include many sec­ondary and rather use­ful ones. Often, it is this fac­tor that helps deter­mine which unin­ter­rupt­ible pow­er sup­ply is bet­ter to pur­chase in a par­tic­u­lar case.

In our rank­ing of the best UPS for gas boil­ers, accord­ing to cus­tomer reviews, there are two types of sources: inter­ac­tive and dual con­vert­er. There is a third type — back­up, these are sim­pler devices that sup­ply ener­gy from the bat­tery to the con­sumer. They are also suit­able for house­hold heat­ing equip­ment, how­ev­er, they are not so pop­u­lar and not very com­mon due to their sim­ple design and aver­age capa­bil­i­ties.

Battery charging time

How long does it take for the bat­tery to be ful­ly charged from the mains?
The tran­si­tion to back­up pow­er can be car­ried out not only with a com­plete pow­er out­age, but also with its jumps. In old, worn-out net­works, this hap­pens very often, and the UPS con­stant­ly changes the source in order to keep the heat­ing in the house and pre­vent the boil­er from turn­ing off. Sim­ply put, bat­ter­ies are con­stant­ly under load and the faster they charge, the bet­ter. It is impos­si­ble that the unin­ter­rupt­ible pow­er sup­ply allows the bat­ter­ies to be com­plete­ly dis­charged. Note that charg­ing the bat­tery requires addi­tion­al pow­er, which must be tak­en into account.

In a UPS with built-in bat­ter­ies, as a rule, every­thing is already cal­cu­lat­ed, but if you increase the capac­i­ty with third-par­ty bat­ter­ies, be sure to cal­cu­late how long it will take for them to be ful­ly charged and, based on this, select the pow­er of the device.

The need to purchase

Mod­ern gas boil­ers need a con­stant con­nec­tion to a pow­er source. The con­trol unit, cir­cu­la­tion pump, igni­tion sys­tem and forced ven­ti­la­tion oper­ate from the net­work.

Advanced users install spe­cial mod­ules with which they con­trol the sys­tem from a dis­tance.

When the pow­er goes out, the device con­tin­ues to work. Most mod­els are capa­ble of not only pro­vid­ing the boil­er with pow­er, but also adjust­ing its oper­a­tion dur­ing pow­er surges.

Ben­e­fits of an unin­ter­rupt­ible pow­er sup­ply:

  • accept­able cost;
  • sim­ple instal­la­tion that does not require spe­cial knowl­edge;
  • excel­lent work with volt­age drops;
  • auto­mat­ic con­trol of all para­me­ters;
  • ser­vice life up to 7 years;
  • silent oper­a­tion.

Additional protection

What oth­er pro­tec­tion options does the device have?
The best unin­ter­rupt­ible pow­er sup­ply is the one that pro­tects not only the gas boil­er, but also itself. There can be many prob­lems in the net­work:

  • over­load;
  • short cir­cuit;
  • net­work inter­fer­ence;
  • high volt­age impuls­es;
  • volt­age drop.

Any of these prob­lems can harm your UPS, and the more pro­tec­tion it has, the bet­ter. Ide­al­ly, choose a device with the max­i­mum set of addi­tion­al pro­tec­tive func­tions, but it will be expen­sive. The most exten­sive list is found in con­tin­u­ous devices. With them, your boil­er is con­stant­ly pow­ered by bat­ter­ies, no mat­ter what hap­pens on the net­work. Trou­bleshoot­ing is done direct­ly at the UPS with­out reach­ing the pow­ered device.


Exist­ing UPS for boil­ers are usu­al­ly divid­ed into 3 groups:

  1. Offline UPS. The sim­plest and cheap­est devices. The design of unin­ter­rupt­ible pow­er sup­plies con­sists of a bat­tery, a volt­age con­troller and an invert­er that con­verts direct cur­rent to alter­nat­ing cur­rent. At the out­put, devices of this type give out a volt­age of 170–270 volts. Off-line UPSs do not have volt­age sta­bi­liz­ers. The main dis­ad­van­tages of the devices are rapid wear with fre­quent volt­age drops and incor­rect oper­a­tion when cur­rent is sup­plied to the device from gaso­line or diesel gen­er­a­tors.
  2. line-inter­ac­tive. Line-inter­ac­tive devices are referred to the mid­dle seg­ment in terms of oper­a­tional char­ac­ter­is­tics. The design is equipped with a sta­bi­liz­er that equal­izes the out­put volt­age of the net­work up to 220 volts. The dis­ad­van­tage is incor­rect oper­a­tion when elec­tric­i­ty is sup­plied from gen­er­a­tors.
  3. Online. The devices work sta­bly when con­nect­ed to cur­rent gen­er­a­tors. They have a com­plex struc­ture. This is the main rea­son for their high cost. These are the most reli­able, cor­rect­ly work­ing devices, with a long ser­vice life.


How many out­lets and con­nec­tors does the device have and what type are they?

If the heat­ing in your home is pro­vid­ed by a mul­ti­func­tion­al, dou­ble-cir­cuit boil­er, you will need only one out­let. But when design­ing com­plex sys­tems con­sist­ing of sev­er­al mod­ules, you will have to con­nect many devices to the net­work at once. For exam­ple, often the pump is placed sep­a­rate­ly, and, accord­ing­ly, it requires an inde­pen­dent con­nec­tion. Before choos­ing a UPS, clear­ly define which units will be con­nect­ed to it. Of course, you can always use exten­sion cords, adapters and tees, but this is incon­ve­nient, and extend­ing the wire is not the best option for high­ly sen­si­tive elec­tron­ics.

Also, some UPSs have con­nec­tors for con­nect­ing third-par­ty bat­ter­ies. Be sure to pay atten­tion to them. If you ever decide to increase the capac­i­ty of the source, you will need addi­tion­al inputs, and they can be designed for just one expand­able mod­ule.

ELTENA (INELT) One Station 600

Compact 600 Watt UPS

A small unin­ter­rupt­ible pow­er sup­ply for three sock­ets with ground­ing and its own bat­tery. Pro­vides fast offline and full load oper­a­tion for up to 15 min­utes. A lit­tle, but it will pro­tect the boil­er from pow­er surges and sud­den shut­downs.Rat­ing mem­ber:
15 Best Unin­ter­rupt­ible Pow­er Sup­plies (UPS)

UPS or generator — which is better?

Not only UPS, but also gen­er­a­tors are used as a back­up pow­er source. To decide which one to pre­fer, it is nec­es­sary to study the advan­tages and dis­ad­van­tages of each of them.

The advan­tages of UPS are:

  • ease of oper­a­tion;
  • lack of strict main­te­nance require­ments;
  • high degree of secu­ri­ty;
  • no need for fuel;
  • no harm­ful fumes.


  • strict require­ments for indoor humid­i­ty;
  • high­er cost than gen­er­a­tors;
  • low pow­er;
  • the abil­i­ty to work only at a tem­per­a­ture of 10 ° C;
  • the need to change the bat­tery every 2–3 years;
  • It takes sev­er­al hours to ful­ly charge.

Gen­er­a­tor ben­e­fits include:

  • fast start­up;
  • low price;
  • quite a long time of work;
  • the abil­i­ty to work at sub-zero tem­per­a­tures.


  • spe­cial require­ments for instal­la­tion and oper­a­tion;
  • fuel require­ment;
  • release of harm­ful sub­stances;
  • noise dur­ing oper­a­tion.

Both pow­er sup­plies do an excel­lent job of their func­tions, so you can decide which one to choose based on finan­cial capa­bil­i­ties and per­son­al pref­er­ences..


What are the addi­tion­al fea­tures that sim­pli­fy or improve the oper­a­tion of the UPS?

The more expen­sive the UPS, the more addi­tion­al fea­tures it has. But in some cas­es, this is exact­ly the moment where you can save a lit­tle by refus­ing unnec­es­sary addi­tions. For exam­ple, if your gas boil­er is locat­ed in a sep­a­rate room, you will not need the sound alarm func­tion for mal­func­tions. As well as a liq­uid crys­tal dis­play with infor­ma­tion, for which some man­u­fac­tur­ers pret­ty much wind up the price tag.

Also often found is the cold start func­tion, posi­tioned as very nec­es­sary and use­ful. It allows you to start the equip­ment in the absence of volt­age in the net­work. But if you have an inter­ac­tive or back­up UPS with small bat­ter­ies, it makes no sense at all. You still won’t be able to start the heat­ing. But the most expen­sive fea­ture is the GSM mod­ule that links your UPS and smart­phone. There is already a mat­ter of per­son­al con­ve­nience and neces­si­ty.

Top Brands

Which man­u­fac­tur­ers should be pre­ferred?

In the ques­tion of which UPS to choose, not the last place is occu­pied by the brand, that is, the man­u­fac­tur­er of the device. The com­pa­ny’s prod­ucts are most in demand among buy­ers Bas­tion

issu­ing sources
. This is pow­er­ful equip­ment that can pro­tect your gas boil­er as much as pos­si­ble from any net­work threats. He is advised by mas­ters in the instal­la­tion of heat­ing sys­tems, but the price here breaks all records.

The com­pa­ny will help you save a lot Sven

also well estab­lished in the mar­ket. She has a large range of UPS for var­i­ous pur­pos­es and with dif­fer­ent char­ac­ter­is­tics. You can choose the unit specif­i­cal­ly for your needs with­out over­pay­ing for fea­tures that you nev­er use.

Do not for­get about the Russ­ian brand Ener­gy

. Whichev­er source you choose, it will be of high qual­i­ty and with the high­est degree of reli­a­bil­i­ty. Here is a pop­u­lar brand
Resan­ta -
not the best choice. As prac­tice shows, its UPS does not have suf­fi­cient reli­a­bil­i­ty to work with the sen­si­tive elec­tron­ics of a gas boil­er.

I. UPS with one external battery (12V)

Mod­els with con­nec­tion of one exter­nal bat­tery, we rec­om­mend using with small heat­ing boil­ers with a max­i­mum load of up to 300–400W for short or medi­um bat­tery life. There are 2 sig­nif­i­cant mod­els on the mar­ket:

1 place. Eltena (Inelt) Monolith E 1000LT-12v ~21 450r.

Elte­na with 12A charge cur­rent and one 100Ah bat­tery

A new mod­el in the Mono­lith line from Inelt. A prod­uct of the Chi­nese fac­to­ry Kehua Tech (www.kehua.com), adapt­ed to the Russ­ian mar­ket.

Advan­tages of UPS:

  • A good range of input volt­ages is 110–300V with­out switch­ing to a bat­tery.
  • Charg­ing cur­rent 12A, which is rel­e­vant when con­nect­ing a bat­tery with a capac­i­ty of up to 250Ah.

The dis­ad­van­tages include:

  • High price for the device
  • New 12V mod­el for the man­u­fac­tur­er

2nd place. Helior Sigma 1 KSL-12V (no longer available in Russia)

This unin­ter­rupt­ible pow­er sup­ply, adapt­ed by our engi­neers to Russ­ian con­di­tions, man­u­fac­tured by Helior Cor­po­ra­tion (www.heliortec.com) has been con­sis­tent­ly ranked first in sales reports for more than a year. Rea­sons for pop­u­lar­i­ty in addi­tion to afford­able price:

  • The low­est fan noise lev­el among ana­logues (rota­tion speed depends on the load)
  • There is a spe­cial mode of oper­a­tion from the gen­er­a­tor (the per­mis­si­ble range of the input fre­quen­cy is expand­ed)
  • Com­pact dimen­sions and the abil­i­ty to oper­ate in two posi­tions
  • Suf­fi­cient­ly high reli­a­bil­i­ty when work­ing with heat­ing sys­tems

Weak­ness­es include:

  • A rel­a­tive­ly nar­row range of accept­able input volt­age val­ues ​​that the source can “pull out” with­out switch­ing to the bat­tery.
  • Aver­age charge cur­rent, which allows you to con­nect bat­ter­ies with a capac­i­ty of 30 to 150Ah.

Top 5. Ippon Innova G2 3000

The use of a dual con­vert­er means that even with a sta­ble load on the net­work, the UPS still pow­ers the donor from the bat­tery. That is, the sinu­soid is always sta­ble and does not change dur­ing sharp tran­si­tions. All due to the fact that these tran­si­tions do not exist in prin­ci­ple. The device just stops charg­ing. Per­son­al bat­ter­ies will last for about half an hour of work. This is not much, but the capac­i­ty can be expand­ed. There are sev­er­al appro­pri­ate con­nec­tors in the chas­sis, allow­ing you to con­nect aux­il­iary mod­ules both in par­al­lel and in series. A sep­a­rate plus will be sim­ple oper­a­tion and a dis­play that dis­plays max­i­mum use­ful infor­ma­tion.


27 600 rub. / Philip­pines / Work­ing Prin­ci­ple: Con­tin­u­ous


Com­pact UPS, equipped with a mass of pro­tec­tive func­tions. An inter­ac­tive type sys­tem is used here, but due to the rapid tran­si­tion to offline sources, the donor hard­ly notices any changes. Dur­ing the peri­od of inac­tiv­i­ty, the device prac­ti­cal­ly does not con­sume elec­tric­i­ty, and is con­sid­ered one of the most eco­nom­i­cal. On board there is its own sta­bi­liz­er that pro­tects the net­work from sud­den drops. It can equal­ize the cur­rent when it drops to 110 watts and when it ris­es to 280. This range means that the tran­si­tion to offline mode will only occur in real­ly extreme sit­u­a­tions, and not at the slight­est jump, as is often the case with oth­er UPSs.


4 700 rub. / USA (Made in Chi­na) / How it works: Inter­ac­tive

Top 3. EAST EA901PS

Pow­er­ful unin­ter­rupt­ible pow­er sup­ply with two own bat­ter­ies and the abil­i­ty to con­nect addi­tion­al mod­ules. The ener­gy of the UPS’s own bat­ter­ies will be enough to pro­vide the donor with elec­tric­i­ty for 15 min­utes. The tran­si­tion to auton­o­my takes 3 mil­lisec­onds, while the sinu­soid prac­ti­cal­ly does not change its shape, which favor­ably affects the sen­si­tive boards of boil­ers and oth­er elec­tron­ics. For con­ve­nience, the UPS is equipped with its own LCD dis­play and has the abil­i­ty to con­fig­ure some para­me­ters. In par­tic­u­lar, you can man­u­al­ly set the aspects in which you need to switch to bat­ter­ies.


17 900 rub. / Chi­na / Oper­at­ing prin­ci­ple: con­tin­u­ous

Top 2. ELTENA (INELT) One Station 600

Despite its com­pact dimen­sions and sim­ple form fac­tor, the One Sta­tion 600 UPS is capa­ble of pro­vid­ing the boil­er with ener­gy for 15 min­utes with an instant tran­si­tion to an autonomous source. It uses a redun­dant type sys­tem, but the tran­si­tion speed is only 3 mil­lisec­onds, so that the donor device board is not adverse­ly affect­ed by a sharp change in the sine wave. Unfor­tu­nate­ly, the bat­tery capac­i­ty is quite small, and it is impos­si­ble to expand the vol­ume of the device with addi­tion­al bat­ter­ies. There are three sock­ets at once, each of which has its own ground­ing.


3 800 rub. / Rus­sia / Oper­at­ing prin­ci­ple: stand­by

Do I need a stabilizer if there is a UPS

Typ­i­cal equip­ment of a mod­ern boil­er is com­plex micro­proces­sor elec­tron­ics.

It per­forms sev­er­al use­ful func­tions:

  • main­te­nance of oper­at­ing modes;
  • oper­a­tional check of con­trol para­me­ters;
  • user noti­fi­ca­tion;
  • auto­mat­ic diag­nos­tics.

The per­for­mance of these units is sig­nif­i­cant­ly affect­ed by the pow­er sup­ply para­me­ters:

  • ampli­tude and shape of the sig­nal;
  • impulse inter­fer­ence.

A spe­cial­ized sta­bi­liz­er for the UPS boil­er can be select­ed tak­ing into account the real state of the net­work. The stan­dard pow­er sup­ply is not able to elim­i­nate the not­ed short­com­ings.