I am working on plans to install lithium batteries for the house bank. Currently, have 3 x Fullriver 260ah AGMs for house batteries and 2 FLA 960CCA as Start batteries. the Fullrivers are still decent but I installed Solar panels last summer and would like to upgrade to LFP to make the most of things. I am adding 2 more solar panels this coming season.
At the helm, there is Start assist that I imagine combines both Start & house batteries, if the Start batteries are weak. I played with it but never needed it. Now, that I am upgrading the house batteries to LFP.. Should I disconnect this option? My understanding is that LFP should not be connected to batteries of different chemistries.
In the ER, I see that the negative of the Start batteries is connected to the ground bus of the house batteries. I could not identify the positive connection between house and Start batteries. I am sure that I will find it in due course but it's not obvious.
To mitigate the possibility of the BMS cutting out under the heaviest load in probably the most vulnerable activities, I am keeping the 3 AGMs for Windlass & Crane davits demands and probably for the hydronic kabola power supply since its connected outside the breaker panel.
I may even try setting up a system where if the LFP BMS cuts out, I can switch to the AGM to supply all house demands.
Any advice/comments on the Start assist/combine connection would be much appreciated.
Thank you
Streff
As background, the Bow & Stern thrusters run on a separate independent 48V Lifeline battery bank with its 48V charger.
At the helm, there is Start assist that I imagine combines both Start & house batteries, if the Start batteries are weak. I played with it but never needed it. Now, that I am upgrading the house batteries to LFP.. Should I disconnect this option? My understanding is that LFP should not be connected to batteries of different chemistries.
In the ER, I see that the negative of the Start batteries is connected to the ground bus of the house batteries. I could not identify the positive connection between house and Start batteries. I am sure that I will find it in due course but it's not obvious.
To mitigate the possibility of the BMS cutting out under the heaviest load in probably the most vulnerable activities, I am keeping the 3 AGMs for Windlass & Crane davits demands and probably for the hydronic kabola power supply since its connected outside the breaker panel.
I may even try setting up a system where if the LFP BMS cuts out, I can switch to the AGM to supply all house demands.
Any advice/comments on the Start assist/combine connection would be much appreciated.
Thank you
Streff
As background, the Bow & Stern thrusters run on a separate independent 48V Lifeline battery bank with its 48V charger.
