I obviously don't know as much about this as I thought I did and I need some help.
- We have 450 Watts consisting of 3 x 150 watts 18 Volt solar panels
mounted flat on an arch. They are connected in parallel via 8/2 cable. This cable leads to the SCC.
- I have installed a single LiFePo4 battery
consisting of four cells of 3.2V500AH to make up one battery
with PCM that allows 50A charging
and 100A with 250/5 discharge. The package is all in a steel
case and has two terminals that I have hooked up my distribution to. When we first installed the battery the meter read 13.5 V and it hasn't been back up there since after the first night providing power. I measured it at the terminals with my multi and the meter also read 13.5 V.
- Is a BlueSky Engergy 3024i with IPN Proremote to give me battery condition and allow changing the parameters for charging
, etc. It is MPPT
and will handle 40 A at 12 volts. It is connected via the shunt to the battery terminals.
- The Volvo
starts with its own SLA battery with its own alternator
charging it and the only time I combine the two is to turn the switch to all and let the LiFePo4
battery charge the house bank for a few minutes, if its low and then turn it back to #1 and start the engine
It has a separate 120 A alternator
MC 614 regulator
that charges the house bank on a separate circuit. This seems to work fine with the charging voltages set for LiFePo4. The 3024i will put a 2 amp charge to the starter battery on float & absorption stages.
- The boat can sit at anchor
and with the set up we have it charges with the first light of day. I may use up to 130 AH over night depending on what happens for entertainment the night before. Usually around -60 AH overnight. The remote
meter shows 100% battery and -00 AH usually before noon to two in the after noon. A week or two of this repeating and the meter voltage starts to drop. I think I have enough solar
power to do it properly.
I know I am in trouble when it starts to go down around 13.1V which it has been doing the last few nights. It worked its way to 12.8V which wouldn't be bad with the Old AGMs I had but not for this battery. I woke this morning and the PCM had everything shut off.
I started the engine and it shot up to 96 A and has worked its way down to 50 A an hour later.
This happens also when I have 13.2V on the meter and 100% battery and -00 AH and I decide to move the boat and the amps from my engine alternator may roll in for over three hours of traveling.
I must not have the right settings on my MPPT
charge controller or I have the wrong controller.
Any suggestions? Sorry for the long description but I could use some help. The boat is currently in Langkawi, Malaysia
with lots of sun most of the time.