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Question:

What is the suitable battery and inverter for using around 14 laptops up to 5-6 hours?

I need a specification of the inverter and battery that will work for 5-6 hours with around 10-14 laptops connected to it. Can any one please help me.

Answer:

You would need to be more specific. Multiply the watts of one laptop power supply by 14, then get a more powerful invertor. e.g. 14 x 50 watt laptops 700 watts, get at least a 1 Kw invertor. It is difficult to predict how long a particular battery will power an invertor, a 1 Kilowatt load will draw a huge current, about 50 amps from a 12 volt battery. If at all possible you would be better off using a petrol or diesel generator and extension leads, as the size of battery needed would be enormous, you would need a no. of 12 volt large 12 volt batteries joined together, or one battery and one x 100 watt invertor for each laptop. You might also consider using a battery to power a DC to DC convertor for each laptop. For example one laptop could use a 12 volt, 50 AH battery and a 12 to 20 volt convertor, this will probably run a 50 watt laptop for 6 hours. I say probably because the only way to know for sure is to try it out. For the price of 14 batteries and 14 convertors you can probably buy a really good silent 1 kw petrol generator. This will be smaller, lighter and probably safer than 14 x 50 AH batteries.

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