I usually use 240v to 12v 8amp transformer at home but when setting up in remote areas I have found this setup reasonable to use. 2 x 12v 900a jump starters connected in parallel I bought them on sale from Kmart about 2 years ago for $40 each, Im not sure how much they retail for now. They run the 12 inch LX200 and 2 dew heaters on full power for around 6 hours.
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