PC UPS inverter for home appliances

[kanni1303]

Am I able to use the PC ups( mentioned 600VA) board for home.
My load will be
two fan 60x2 = 120W
two tube light 40x2 =80W

so total will be 200W.

I am not aware of amp ratings since the battery is 12V 7AH approx 60W gives backup less than 20 mins,

What happens If I connect some battery with ratings of 12V 50AH or 100AH

 

[nikhilmahasvar]

Your charger will fail soon if you connect higher AH battery.

Normally PC UPS's are not designed to connect inductive loads so connecting your fan and tube lights having coil type chokes will damage the inverter section also. You may use CFL's, Electronic choke tube lights and mobile chargers etc. without any problems.

 

[ALERTLINKS]

You have to put a big battery outside the box and an external charger.

 

[Tipu606]

the UPS transformer is not rated for continous operation, it will get overheated very soon
It will simply not work

 

[kanni1303]

With these information I decided one plan... What happens if I bypass the charging current with TIP36 or similar to that, since this current might be the reason for these problems...????

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Is it the design will be like that, since I don't find any difference in the transformer used for home ups inverter and PC ups inverter, with slight weight alone.

the UPS transformer is not rated for continous operation, it will get overheated very soon
It will simply not work

 

[nandhu015]

Most home ups have a cooling fan which will keep the mosfet's cool. Computer ups dont have this option. Not only transformer the whole system(computer ups) was designed to work only for few minutes (say 20 to 30).

 

[dick_freebird]

You could supplement the cooling and maybe get the UPS to
survive but I would recommend a straight MSW inverter with
continuous operation capability, and as many car batteries as
you think you need.

I've got a plan to make a whole-office UPS using one big
inverter, two big car batteries and a RV "converter" (wall
plug to 12V at 100A max). No cutover scheme needed,
charge management all nice nice, scalable run time. I
can run the core equipment on 1kW judging by the load
current displays of my existing UPSes.

 

[kanni1303]

Thanks,

So if I also use the RV Converter and power inverter means I can use it for continues operation,

or I should use cooling system along with the PC UPS to use for continues operation.

Am I right...???

You could supplement the cooling and maybe get the UPS to
survive but I would recommend a straight MSW inverter with
continuous operation capability, and as many car batteries as
you think you need.

I've got a plan to make a whole-office UPS using one big
inverter, two big car batteries and a RV "converter" (wall
plug to 12V at 100A max). No cutover scheme needed,
charge management all nice nice, scalable run time. I
can run the core equipment on 1kW judging by the load
current displays of my existing UPSes.