Quote Originally Posted by mudski View Post
Just get a deep cycle for under the bonnet mate. you can run them almost flat and recharge them. Decent deep cycles are designed to discharge down to around 20% of its capacity, the cheaper units maybe around 40%.
A Redarc SBI12 would be more than enough for under the hood too. And I'll still cheaper than the DC-DC.
I thought like 80% was the minimum? I thought 12.7 volts was the danger level.

Choppa seems to be the man to talk to about this stuff, from what I have read.