I have a Multiplus 2000 inverter / charger. When the main switch is in either 'inverter' or 'charger only' position, the transfer switch works as it should, acting as a pass through when an external power source is detected. When the main switch is off, the transfer switch does not work. I would think the transfer switch would work independently of the inverter.
I may only want solar to charge the batteries and if hooked to shore power, I must turn the inverter on in order for A/C to pass through. I know I can make changes to the configuration to limit charging, but this seems inconvenient to go back and forth changing the charge settings just so the transfer switch works.
Can you explain the design criteria for this? Is there a better work around?