Can Battery Charging Be Disabled While Connected to AC Power on RT31S?

[MechGuy]

I bought a LiFePO4 portable power station, Dabbsson 3000L, and plan to use it when not at the dock and anchoring out, mainly to heat water and run a coffee maker in the morning. When I plug into the shore power plug on the boat with the power station, it's going to want to charge batteries too. I'm wondering if I can turn off battery charging for this situation? I have a 400W solar panel for the house batteries that will charge batteries just fine and I'll be installing a 440W panel just to charge the power station. My 31 is a 2017 and my inverter/charger is a KISAE 2000W IC122055. Thanks for any comments.

 

[Maggie Anne]

This is for the later model R31 but I think you can turn off the big red switch to the inverter/charger and check the control panel to see if shows a charging state

 

[Maggie Anne]

This might disable your solar power input though?

 

[MechGuy]

This is for the later model R31 but I think you can turn off the big red switch to the inverter/charger and check the control panel to see if shows a charging state

View attachment 27038

Thanks for the diagram, that's helpful. Mine looks to be setup the same. I did a test before I wrote my original post where I applied AC shore power but had the Power Switch (disconnect) turned off, but the ABSO display indicated "CHG" on it which confused me (I have the newer ABSO inverter/charger which adds the "CHG" in the display as well as Lithium support). My house batteries (AGM) also showed over 14 volts which was probably just due to solar kicking in and not the charger as I had lights on to pull some charge out of the system and it was daytime. The solar controller sends power to the house batteries directly and not through the inverter. I'm thinking that maybe the charger doesn't know the disconnect is off but you'd think it would see no load and know. It's just dawning on me that the red wire from the top of the inverter is passing DC from the battery to invert to AC and and sending it the other way to charge, all through the power switch. So the switch should control charging of the batteries no matter what the display says...I'm thinking.

 

[OverTime]

The solar controller sends power to the house batteries directly and not through the inverter.

Are you sure about this? I thought it all goes through the charger/inverter first? I have a 2025 R-29 CB

 

[MechGuy]

Are you sure about this? I thought it all goes through the charger/inverter first? I have a 2025 R-29 CB

My 31s was wired directly from the solar controller to charge the house batteries and to the engine battery, 90% and 10% respectively. I changed out the solar panel to 400 W and changed the solar controller to a Victron 100/30 mppt which now only charges the house batteries directly and relies on the ACR relays to also charge the engine and thruster batteries. At least that’s how my 2017 was setup.

 

[Mike and Sarah]

I believe Overtime is correct. Shore power goes to the charger inverter before being passed through to the 120 v panel. When shore power is removed the inverter turns on to supply 120 a/c power to the boat. Plug the shore power back in and the inverter automatically switches back to shore power and turns on the 12 volt charger.

 

[Mike and Sarah]

My 31s was wired directly from the solar controller to charge the house batteries and to the engine battery, 90% and 10% respectively. I changed out the solar panel to 400 W and changed the solar controller to a Victron 100/30 mppt which now only charges the house batteries directly and relies on the ACR relays to also charge the engine and thruster batteries. At least that’s how my 2017 was setup.

This is the same way I wired in my dual panels and the victron 100/30 controller.