Ctek 7002 supply mode?

[gride]

Can I hook my stereo batteries to supply mode for tuning my stereo? I won't be running the boat. Just the stereo.

[EarmarkMarine]

The smart charger is not a convertor nor a true power supply. You can run it in continuous duty as long as the batteries are in parallel and you limit the demand to 7 amps. Treating a charger like a power supply can run it into the ground or place it into a protection/limiting mode. If it is a short application for tuning and the battery voltage remains relatively high then I see no problem.
But if you are running a large system and playing loud for a prolonged period in the driveway for example, it's not recommended for smaller chargers.

David
Earmark Marine