ewarnerusa wrote:
I'm basically wired up like the diagram. 4 gauge from controller to batteries (parallel 12V) with about 5' wire run. Separate 0 gauge wiring for the inverter, also about a 5' run. Both wire runs terminate right on the battery posts. I am using voltage sense wires as well. I have about a 0.1V drop between the controller and batteries which the controller compensates for.
Someone else suggested this, but you might try disconnecting the voltage sense line for storage. The reason is we know the charge controller is a little slow responding. So if you start with an extra .1v of charge to compensate for line losses, then reduce the current the inverter is drawing, the current the system is drawing from the charger will drop, reducing the correct compensation to, say .01 v. But with the lag, the controller will keep the .1v compensation going for a couple of seconds, making the natural voltage overshoot of a charged battery even worse.
If this helps, larger or shorter cables from the charge controller to the battery could help.
Also you could cheat and just put a switch in the voltage sense line, off for when using the system when fully charged in storage and on for camping.
Jim
