kind of a saga but I don't know what to do so...
built system end of may/early june.
victron mppt 100|20
2 x 12v 100ah lithium in series
450 w panel (Voc-49V)
3000w 24 v inverter
seemed to be working fine for a few weeks with voltage steady at around 26-27v max a day.
Then I left for an hour and a half and in that time the inverter alarm had gone on and then shut off AND the batteries had gone off completely so that even the little battery monitor I have hooked up to them shut down and the charge controller shut down. Everything off.
I disconnected the batteries from series, checked the voltage. One was around 12v the other around 0.4v. I didn't even know that was possible. The low voltage battery was the first in the series.
I connected them in parallel to wake the second one up and managed to equalize and reconnected them into the system. Lasted about half a day before I started discharging the batteries with more than my fridge (just a 60w fan and 5w max fan, maybe a phone charger) and then i could watch them lose voltage in real time on the victron app. I ended up trying to charge with a Lithium Battery charger and the low battery was so low that the charger wouldn't recognize it.
I assumed it wasn't a problem with my system as everything had been working for weeks seemingly ok.
So i got the battery manufacturer to replace the battery that had been at .4V
Fast forward to me getting the battery (and 3 weeks with no power in July)
i measured each battery and charged one so they were the same voltage before re-connecting them in series as I had before. This time the new battery was the first in the series. It's been 5 days with no problems until this morning I woke up and no power. The only thing I did differently yesterday was add my fridge (45 w) back into the solar system and off the car battery. Last I checked mid-afternoon/evening yesterday voltage was around 26.something. Was running my fridge and both fans all night until at most 4:30 am when i realized no power. I don't think that is enough to drain the batteries. This time I measured and the new battery is 13v, the old one that had been alright is at .25v. This time it was the second battery in the series that has the low voltage.
Again I connected them to equalize and got the low voltage up to 11.9v and will try charging them separately before connecting again, but there is something I'm missing. I don't know if the battery company will replace this one and I'm not made of money and I also want power. So, there's got to be another problem/solution but I don't know what to try.
Any one have ideas? Thanks
built system end of may/early june.
victron mppt 100|20
2 x 12v 100ah lithium in series
450 w panel (Voc-49V)
3000w 24 v inverter
seemed to be working fine for a few weeks with voltage steady at around 26-27v max a day.
Then I left for an hour and a half and in that time the inverter alarm had gone on and then shut off AND the batteries had gone off completely so that even the little battery monitor I have hooked up to them shut down and the charge controller shut down. Everything off.
I disconnected the batteries from series, checked the voltage. One was around 12v the other around 0.4v. I didn't even know that was possible. The low voltage battery was the first in the series.
I connected them in parallel to wake the second one up and managed to equalize and reconnected them into the system. Lasted about half a day before I started discharging the batteries with more than my fridge (just a 60w fan and 5w max fan, maybe a phone charger) and then i could watch them lose voltage in real time on the victron app. I ended up trying to charge with a Lithium Battery charger and the low battery was so low that the charger wouldn't recognize it.
I assumed it wasn't a problem with my system as everything had been working for weeks seemingly ok.
So i got the battery manufacturer to replace the battery that had been at .4V
Fast forward to me getting the battery (and 3 weeks with no power in July)
i measured each battery and charged one so they were the same voltage before re-connecting them in series as I had before. This time the new battery was the first in the series. It's been 5 days with no problems until this morning I woke up and no power. The only thing I did differently yesterday was add my fridge (45 w) back into the solar system and off the car battery. Last I checked mid-afternoon/evening yesterday voltage was around 26.something. Was running my fridge and both fans all night until at most 4:30 am when i realized no power. I don't think that is enough to drain the batteries. This time I measured and the new battery is 13v, the old one that had been alright is at .25v. This time it was the second battery in the series that has the low voltage.
Again I connected them to equalize and got the low voltage up to 11.9v and will try charging them separately before connecting again, but there is something I'm missing. I don't know if the battery company will replace this one and I'm not made of money and I also want power. So, there's got to be another problem/solution but I don't know what to try.
Any one have ideas? Thanks