Sailboat - Port MPPT 90W / Startboard MPPT 0W_new install_2 ea 460ah LiFePo per side

[JulietPapa (JP)]

Greetings all. My first post (new to community.)

I’ve installed 4 x 260ah LiFePo (LiTime) batteries on a sailing catamarn, upgrading previous solar and house battery system. Also 4 x Renogy 200W panels. Divided 2 batts / 2 panels per side, port and starboard. Victron 100 / 30 MPPTs each side. Port side app is showing Bulk charging and some Solar wattage (its somewhat cloudy today.) Starboard side had been showing Zero wattage and Absorbtion state, and just recently changed to Zero / Float.
My question is if the Starboard state is actually supplying voltage. I understand the concept that the controller shuts off with full battery charge, but I find it strange that side has been able to move from Absorbtion to Float with Zero voltage. NOTE that the 2 system sides are connected so that one set of panels can charge all 4 batteries…this is what I’m thinking is happening, given the Zero starboard wattage since connected earlier today. Am I correct? Have insured all connections are good. Appreciate any thoughts! JP

[pwfarnell]

1. you do not appear to have the same float voltages set.
2. Yes you can get one controller showing a lower current of they are interconnected. One way around this is setting up a VE Smart network and synchronising charging.
3. Your problem may be that there is no connection between the MPPT output and the battery, or a high resistance connection. The MPPT is then keeping the output terminal at voltage but does not need to supply current.

[JulietPapa (JP)]

Thanks! Solved with your help re no connection between MPPT and batteries. Evidently factory supplied fuse came apart at some point during previous trouble shooting. Thanks again