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• If 1KW heater then the battery will have to give about 100 Amps at 12 Volt to the (very large) invertor.
• If 2KW then 200 Amps

Quote: Originally posted by stewey on 01/5/2011

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hi birder.. i thought if i got a battery and inverter both the highest output i could run electric appliances in tent . how do people run them in caravans and baots but not in tents  i told you i was rubbish on electric problems... cherrs...stewey

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Boats and caravans have 12v system along side the 240 volt.  What you don't see from a tent is the caravanner turning the fridge and heating to gas and using the gas kettle 

Don't call them tin tents for nothing     

Just fitted our caravan with LED light bulbs to reduce it's power need for when we are off grid. 

But back to your question,  forget the inverter and running any high powered items.  A leisure battery will keep your lights running.  It can also be used to power other 12v items, but the more you use then you need to think about putting power back in to it.

Options are charging from a secondary charger fitted in boot , just take your battery out with you when out for the day.  Solar panel, or drop it off at a local garage and usually they will put it on charge for the day for you (discuss cost first).  Some campsites also offer this facility.