I am able to connect bluetooth to the charger when connected to mains power (the lights on the charger are on), but I cannot connect when not connected to mains nor when it is being charged via Anderson Plug by the car or solar panel (charger lights are not on in these instances). Should I be able to connect?
That is totally normal, the charger is only powered by the AC not from the DC side.
Thanks for your response. So I can't check the battery charge when off grid?
Correct, to see the battery voltage via Bluetooth you can use for example the SmartBattery Sense.
https://www.victronenergy.com/accessories/smart-battery-sense
