Hi struggling with voltage and Watts ect. I have a 1000 litre ibc, 450 litre tank in van. I would like advice on heating element for both and solar panel for charging leisure battery in van. I run 1 pump and electric reel. Any other advice on tried and tested winterproofing appreciated. I can't run electric to van over night so relying on leisure battery and thermostat to do the job. Thankyou.
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