Hey everyone,
My wife and I live on thew road and currently in Alaska for the summer in our small Travel trailer. I built the system myself from knowledge in this group and it's worked fine for almost 2 years.
I have a Growatt All in One 24v system with TWO 206ah SoK Batteries.
A few weeks ago I hit the tongue jack button and it seemed like a tripped a breaker, no power all of a sudden. After getting out the volt meter I determined that my 24v to 12v buck step down converter had gone bad. After using 1 battery to the system and waiting a week for a part I was back in business (at least I thought so).
I charged the battery I had been using back up some but both batteries weren't at the same voltage. I have a battery balancer on them so I figured I would see how much they "balanced" during my 3-4 hour drive that first day and if need be charge up the low battery some more once getting to a new spot. I have a Victron battery charger and a Genny,.
When I got to camp that Night and went in the rig I could smell an electrical burn (never good). My battery balancer had burned out and the battery I had NOT been using and had the fuller charge was at 17.1 Volts!!! I unhooked the batteries and hooked just that 17 volt one back up and went out and used the tongue jack several times to get it down and voltage.
That was like June 28th. Over the last week that battery has been very wonkey and I've been monitoring it multiple times a day. When they system is hooked up and charging from solar or the truck while driving (all going through the all in one) that battery is charging at like 15.1 to 16 volts while the other has a regular voltage of like 13.35. As soon as I put a load on the batteries & run something (other than LED lights) the "wonky" battery voltage drops down to a reading of like 12.87, the other battery is still around the 13.35 and seems to be acting normal.
I am using a volt meter directly on the batteries whole hooked together.
I unhooked them all a few days ago and measured them after getting a reading like the 12.87 and 13.35 and then the 12.87 measured back at a normal range of 13.4 or something and the other was right where it was when hooked up.
The last 2 days while driving and charging the all in one has hit a fault both days because I have the stop charging safety set to 30 volts. Both days the "wonky" battery has hit like 16. something Volts while the other is at its normal 13.35- 13.4 ish range.
Last night I unhooked everything again and charged the lower battery to full with the victron charger 13.52 volts (close to full) and then put the charger on the other battery and it wouldn't do anything as it read 14.67. This morning after using the coffee pot, toaster, starlink etc. I got more readings. The "Wonky" battery was charging at 15.15 again and the other other at 13.4.
I have ben trying to contact "Current Connected" (where I got the batteries) since Friday the 29th. They of course took off until yesterday (which I totally Understand) but they have been to busy to take my calls or reply to my emails other than two 1 sentence replies that don't make sense and confirm they actually didn't read what I sent them.
I am guessing I have a bad BMS, Bad cell(s) or both.
Being In Alaska means it's almost impossible to find people / parts to fix things so I'm hoping to get some feedback here.
Sorry for the long post and thanks in advance.
Lee
My wife and I live on thew road and currently in Alaska for the summer in our small Travel trailer. I built the system myself from knowledge in this group and it's worked fine for almost 2 years.
I have a Growatt All in One 24v system with TWO 206ah SoK Batteries.
A few weeks ago I hit the tongue jack button and it seemed like a tripped a breaker, no power all of a sudden. After getting out the volt meter I determined that my 24v to 12v buck step down converter had gone bad. After using 1 battery to the system and waiting a week for a part I was back in business (at least I thought so).
I charged the battery I had been using back up some but both batteries weren't at the same voltage. I have a battery balancer on them so I figured I would see how much they "balanced" during my 3-4 hour drive that first day and if need be charge up the low battery some more once getting to a new spot. I have a Victron battery charger and a Genny,.
When I got to camp that Night and went in the rig I could smell an electrical burn (never good). My battery balancer had burned out and the battery I had NOT been using and had the fuller charge was at 17.1 Volts!!! I unhooked the batteries and hooked just that 17 volt one back up and went out and used the tongue jack several times to get it down and voltage.
That was like June 28th. Over the last week that battery has been very wonkey and I've been monitoring it multiple times a day. When they system is hooked up and charging from solar or the truck while driving (all going through the all in one) that battery is charging at like 15.1 to 16 volts while the other has a regular voltage of like 13.35. As soon as I put a load on the batteries & run something (other than LED lights) the "wonky" battery voltage drops down to a reading of like 12.87, the other battery is still around the 13.35 and seems to be acting normal.
I am using a volt meter directly on the batteries whole hooked together.
I unhooked them all a few days ago and measured them after getting a reading like the 12.87 and 13.35 and then the 12.87 measured back at a normal range of 13.4 or something and the other was right where it was when hooked up.
The last 2 days while driving and charging the all in one has hit a fault both days because I have the stop charging safety set to 30 volts. Both days the "wonky" battery has hit like 16. something Volts while the other is at its normal 13.35- 13.4 ish range.
Last night I unhooked everything again and charged the lower battery to full with the victron charger 13.52 volts (close to full) and then put the charger on the other battery and it wouldn't do anything as it read 14.67. This morning after using the coffee pot, toaster, starlink etc. I got more readings. The "Wonky" battery was charging at 15.15 again and the other other at 13.4.
I have ben trying to contact "Current Connected" (where I got the batteries) since Friday the 29th. They of course took off until yesterday (which I totally Understand) but they have been to busy to take my calls or reply to my emails other than two 1 sentence replies that don't make sense and confirm they actually didn't read what I sent them.
I am guessing I have a bad BMS, Bad cell(s) or both.
Being In Alaska means it's almost impossible to find people / parts to fix things so I'm hoping to get some feedback here.
Sorry for the long post and thanks in advance.
Lee