Our new LiFePo system
I replaced the 6 new flooded LA Exide 130Ah batteries in our new boat with 8 Balqon specials 700Ah cells for 12V/1400Ah.
I use a LightObjects programmable voltmeter set to:
HVC 14.2 off/ 13.4 back on
LVC 12.0 off / 12.5 back on
With it I drive two BlueSea solenoids for LVC and HVC.
All loads are on the LVC busbar and all charges are on the HVC busbar.
I have a Junsi Celllog, just need to hook it up. Too many other things to do still. So far cell voltages are very close when measured (less than 10mV) with a multi meter.
We will rarely be in a marina. So all power comes from solar and alternators.
6 – ET-Solar 300W panels
in parallel on one Outback FX60
3 panels in series on another Outback FX60
The first 3 weeks we lived on a dock
in Ft. Lauderdale while installing all the systems. I used the factory Cristec charger
every 3-4 days to get the voltage to about 13.8V then shut it off.
Then we had 2 weeks of travelling down the Bahamas
islands with most days motoring as the winds were nearly always on the nose. No problems so far with the stock Hitachi 100A alternators (more in another post).
Now we have been on anchor
for two weeks with no motor
runtime. The first 10 days we had no problem getting the batteries to near full or full every day. However, the last 4 days we had 100% cloud cover and some rain. Really gray.
We run two 12V Vitrifrigo fridges (poorly insulated) and a 110 quart Dometic portable fridge/freezer set to -15C. We also run a Spectra Newport
400 12V water
maker. From the Victron Multi-Plus inverter
we run a toaster, a cappuccino maker and a washing
On Wednesday, the last decent day, we had friends leave, so we did some washing
and water maker running that brought the batteries down. The next 4 gray days the solar produced only between 120 and 230 Ah. By Monday morning we were 900 Ah down – 35% SOC.
Today the solar produced 650Ah or 4.7kWh.Even though we did a 5-hour watermaker
run we are up 400Ah (to -500Ah) on the batteries.