The battery meter was indicating rapid powerdraining, which I determined was coming from the instruments and pumps. What could I do? The batteries would soon be drained too low to be recharged. How is this possible?
If the battery meter shows the batter Voltage drops lower the 12.5 on the 12V batteries they will most likely be incapable of recharging. They'd run flat and die. My batteries are usually reading input between 13.5v and 14.5v. But we're dropping and after 5 minutes I could see the rate of power loss was going kill them while I was on board.
At Anchor: The engine would need to be started in order to top up the batteries before they lose too much power to start the engine when you're ready to leave. TandEadapt, has an optional 40amp, charger beside the normal 10 amp charger, which can be used to top up the batteries more quickly.
Leaving the yacht is not a problem when the batteries are switched off and there is current keeping them charged. However, this morning the marina was doing maintenance and the mains power was disconnected for an hour, while I was using battery powered systems on board.
So I turned the engines on.