12v 20ah or 40ah deep cycle or AGM batteries

Does anyone have any good cheaper sources of these? Looking for 2 x 20ah or one 40ah

Just putting together a small 12v solar system for camping beside car.

My 5V lightweight system works mint but wanting a bigger capcaity system for when i dont have to carry it, so it can do a bit more.

Possibly
AA Champion AGM Deep Cycle Batteries

If camping by the car you cant just run off of the car battery ?
What are you running off of it? Alternators can boot a heap of current back in to a battery in a very short time Ie fridge for a couple of days,start car and run at 1500 rpm for a couple min?

Quote:

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Originally Posted by veitnamcam

If camping by the car you cant just run off of the car battery ?
What are you running off of it? Alternators can boot a heap of current back in to a battery in a very short time Ie fridge for a couple of days,start car and run at 1500 rpm for a couple min?

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Need it to be totally standalone from car, ie so I can take it anywhere it doesn't need to be carried too far. Ie fly in trips or camping with family.

Quote:

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Originally Posted by GWH

Need it to be totally standalone from car, ie so I can take it anywhere it doesn't need to be carried too far. Ie fly in trips or camping with family.

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Ah.....I went generator for that.