Hi all - long time lurker, but this is my first post. I am looking to upgrade from my current AGM configuration (2 270 Ah Mastervolt AGMs) to either 2 280 Ah or 3 200 Ah LiFePo4 batteries built using prismatic cells most likely with a 200 A Daly smart BMS.
Background
Our boat is currently set up with a Mastervolt Mass Combi 12/2500-120 charger inverter and the Mastervolt Solar Chargemaster 60 MPPT solar charger. On the Mass Combi, there are four charge profiles. First is standard which is bulk which builds up to 14.4V until it reaches absorption (14.4v) and then float (13.25v); Then there is an option for Gel/AGM/Spiral which adds .55v to the float phase (13.8v). Option 3 is "traction battery", increasing the bulk stage +0.7v and absorption stage + 0.4v. Lastly, they have a forced float option which sets all 3 charge modes to a fixed 13.8v.
The solar charger can be configured for Mastervolt's Li-ion batteries which performs some messaging on their Masterbus which I don't believe I can do. There are options for a user-defined charge profile on the MPPT where I can specify voltage for absorption/float and set max current, so I think that would be the best route forward for that charger.
Question
My question is for the Mass combi, which battery profile would be best (if any)? The constant 13.8 V profile seems too low, but their standard 3-phase profiles also seem less than ideal. I would like to keep the Mass Combi as I expect 80% + of my charging will come from my solar (800 W total), but don't want to commit to the charger/inverter if it risks damaging the batteries long term. Any experience with this equipment or other thoughts/suggestions are appreciated.
Background
Our boat is currently set up with a Mastervolt Mass Combi 12/2500-120 charger inverter and the Mastervolt Solar Chargemaster 60 MPPT solar charger. On the Mass Combi, there are four charge profiles. First is standard which is bulk which builds up to 14.4V until it reaches absorption (14.4v) and then float (13.25v); Then there is an option for Gel/AGM/Spiral which adds .55v to the float phase (13.8v). Option 3 is "traction battery", increasing the bulk stage +0.7v and absorption stage + 0.4v. Lastly, they have a forced float option which sets all 3 charge modes to a fixed 13.8v.
The solar charger can be configured for Mastervolt's Li-ion batteries which performs some messaging on their Masterbus which I don't believe I can do. There are options for a user-defined charge profile on the MPPT where I can specify voltage for absorption/float and set max current, so I think that would be the best route forward for that charger.
Question
My question is for the Mass combi, which battery profile would be best (if any)? The constant 13.8 V profile seems too low, but their standard 3-phase profiles also seem less than ideal. I would like to keep the Mass Combi as I expect 80% + of my charging will come from my solar (800 W total), but don't want to commit to the charger/inverter if it risks damaging the batteries long term. Any experience with this equipment or other thoughts/suggestions are appreciated.