Inverter

[RY469]

Not a great idea. Old connected to new, they will only perform as well as the (worse) old ones. You're better off using just the new ones. If you must use the old ones, separate them with a DC-DC charger and use them on a separate circuit. Better yet, you have trolling motor batteries for your boat.

[RY469]

Maybe the old ones can be separated off to run just the TV or something. When dead, time to stop watching . . .

[rburns6096]

i have 189DD and use diy 200 watt solar suitcase to move around to get max sun and keep trailer in shade. 200 AH Lithium Battery bed side storage compartment and 1500 watt inverter with converter shut off braker. inverter is connected to shore power plug from the outside. i addition i have DIY 100 AH power generator with a 500 watt inverter for night use for TV is not using large inverter.