I'd suggest calculating total Amp draw of loads on the aux battery
system first. This will be a big factor in determining required parts
and system design.

Apologies if Dennis already wrote of this but I'd suggest designing
the system with "head room" for future added loads. e.g. size wires
from charge source(s) to aux battery and from battery to new fuse
panel, accordingly.

One common mistake that's easily made is under sizing things like the
battery and/or solar charge system. Having to upsize parts like
battery later on, is a drag.

Neil.

On 2/20/21, Douglas Toomey <drt@uoregon.edu> wrote:

> I would like to install an LiFePo battery.  Not sure if it should be 50Ah or
> larger.  The preferred location is beneath the driver’s seat.

-- 
Neil n

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