6 Comments
User's avatar
David Lee's avatar

I installed this switch to bypass my inverter/charger, should it decide to not function properly. I put jumpers between two poles as this switch is designed for two separate inputs and outputs.

Expand full comment
Terry Brown's avatar

How about this one?

Akozon Battery Isolator, 300A Battery Switch 3 Position Dual Circuit Power Disconnect Switch Battery Cut Off Isolator for Marine Boat Car RV https://a.co/d/hbEhzlk

Expand full comment
Chris O's avatar

This is the Blue Sea switch I'm using. No 1+2 position to get me in trouble ;)

https://www.amazon.com/dp/B001V7TL10?th=1

Expand full comment
Mike Miles's avatar

A battery isolator (two diodes) could avoid having to switch the charger.

https://www.amazon.com/Victron-Energy-Battery-Isolators-Batteries/dp/B08L5RRQJR/ref=asc_df_B08L5RRQJR/

I can't help but wonder what is so horrible about connecting them together (maybe with a fuse). When the current from AGM to FLA settles down, the AGM will be at slightly lower than 100% SOC. Not perfectly optimum, maybe a slight cost to cycle life, but what is the damage? One might also switch them together after the AGM is used down to 90%, then the equal voltage can allow reasonable current sharing. I haven't tested this, just speculating and looking for rationale.

Expand full comment
chick doe's avatar

instead of the blue sea battery selector switch would a simple SPDT knife switch work to select one battery bank or the other, but not both?

Expand full comment