New Victron multiplus II install.. Charge rate displayed on unit is wrong?

nyoffgrid
nyoffgrid Registered Users Posts: 26 ✭✭
I installed my new victron multiplus II 24v/3000/70 last weekend. I have a single 200ah 24v lifepo4 battery. I also got the MK3 to be able to adjust settings on it. 

I do not have solar panels and instead I charge the batteries at night with my 2200 honda generator. My battery is from Chins and they provided my absorption and float rates. 

first night - battery was charged and displayed bulk charging on the victron unit at first and then when I woke up in the morning it only moved over to absorption but did not go to float. SOC 100%

2nd night - battery was at 66% SOC per the chins bluetooth app that is linked to the battery. plugged in generator... it displayed absorption charging (skipped bulk) yet judging from how fast the battery was charging and how much power was pulled from generator it was actually in bulk..
got up in the morning to inverter displaying float and battery at 100%. 

3rd night - battery was at 65% soc when I plugged generator and it showed float charging.. skipped both bulk and absorption. but once again judging from power pull from generator and speed that the SOC was raising - it was indeed at bulk. woke up to it showing float still and battery at 100% 

Then monday I was able to call up inverters are us for some tech help. They noticed that I needed to update my firmware on inverter which I did. We also adjusted some settings (unrelated) to the voltage dynamic limiter . I then started the generator just to see if it fixed the charge state diplay thing.. it did show bulk and switched over to absorption but once it got to 100% it did not switch to float but I had to leave by then and shut off all so not so if it needed more time to move over to flaot? Inverter tech person told me to reconfirm with Chins that my voltage numbers are correct.. Which I will. 

Any advice? 

Also, it seems like it is charging the battery at a super fast rate. It goes from 66% to 97% in about an hour an a half.. makes sense? 

Comments

  • SumPower
    SumPower Registered Users Posts: 81 ✭✭
    Yes, an hour and a half makes sense.
    Nominal Voltage of 24 volts DC x 200 AH = approx. 4800watts
    4800w x . 66% = 3168 w

    gen output of 120 volts at 10 amps (setting from other thread) = 1200 watt/hour
    1.5 hours = approx. 1800 wh   - inverter efficiency? 95% and - battery efficiency? 97%
    1800 x 8% = 144w 
    .66% = 3168w + (1800w -144) = 
                3168w + (1656 w) = 4824 All approximations. But in the ball park.