Adding Extra Battery Power to FFE

[Anti_Climax]

So, you'll want to tap the output that will be powering the vehicle contactor and run that to another small relay. Then use that relay to switch your additional contactors with a new fused 12V circuit.

Chances are good that the relay will not handle driving 2x the normal load, but a small relay should be a marginal increase over the stock contactor load.

Let me know if you need/want a diagram

 

[TheChickenTendy]

If you could draw up what you are talking about that would be greatly appreciated.

 

[Anti_Climax]

If you could draw up what you are talking about that would be greatly appreciated.

 

[triangles]

How much power does the Focus motor draw? What discharge rating should I be looking for with an external pack? Also any leads on where I can get Li-ion packs? I can only find LiFePO4 packs in large sizes.

batteryhookup.com has an assortment of new, used, and salvage batteries.