SolarSamSurfer
Here to learn.
- Joined
- Apr 24, 2022
- Messages
- 83
Hey guys, I am having some issues with my system thats fully offgrid and im not sure if i have the settings set up wrong or if my batteries are just very low quality and failing already.
Equipment: 2x 385 panels in series 8 AWG cable 20 meters from inverter, inverter growatt SPF 3000TL LVM48v, batteries lead acid 4x LTH 205AH 12v in series to make 48v with 6 AWG wire.
Growatt settings: 1-SBU 2-60A 3-N/A 4-off 5- FLD 6-on 7-off 8-120v 9-60hz 10-4 11-30a 12-NA 13- 54v 14- only solar 15-on 16-on 17-on 18- disable 19- 58.4v 20-54v 21-42v 22-enable
Locatation- 15N 96W very light rain season
I installed my system in October 6 months ago, for the first week i didn't have anything heavy connected just maybe 20w worth of LEDS. After a week i connected a fridge and was having low voltage problems straight away, i checked the batteries one by one and two out of four where not holding charge. No problem trip to the supplier and they where changed with the warranty they came with. Now 6 months have passed and last week at 6am my system alarm went off for low voltage (44v), this week i have been having to unplug the fridge so that the alarm doesn't go off. When i checked in the night time one is dead only 10.3 while others are 12.5. the battery that's only reading 10.3 is one that was replaced already and since i claimed the warranty i don't get any on this one so i will need to buy a new battery. I got a new battery a few weeks ago and noticed that in the evening the voltage number where a little lower then before i started having an issue but not low enough to trigger the alarm until 1 week had passed. Before having a problem as well the batteries would normally finish charging at 2pm and i would notice every afternoon for a few hours the growatt making a clicking sound. when i would try to see the error message it would be gone until after months i finally saw it number 3 for over charge. I'm guessing that after fully charging the growatt kept trying to charge them then over load protection went off for a few months everyday causing my damage to my batteries causing one to die. After replacing the battery i have been checking the system between 12-4 pm most afternoons to see what's going on to make sure its not setting the overload protection off on repeat again, it isn't overcharging anymore but its failing to get to the Contest Voltage charging stage some days. Important note about the fridge, i have the growatt data from the dongle so i can see the watt output throughout the day and the fridge turns on an hour then off an hour approx. to maintain temperate. Since changing the battery the data is showing the fridge on constantly, ive made a few tests: if i turn the thermostat inside the fridge down it turns off for a little while before turning back on to cool down again. I've thought about it and the fridge is making noise a lot more lately. This could also be because spring/summer is coming and its getting hotter but i live in the tropics so i don't really have a change
Need help understanding if its a system problem or if its the fridge. i understand that the growatt over charging the batteries for a few months would do a lot of damage to them but that isn't happening any more. Maybe i need to change the settings, i did recently learn that there are settings for the flood batteries to stabilize them settings numbers 43, 44, 45, 46, 47, 48. anyone have recommendations on them because i have it turned off at the moment
If you arrived here thanks very much for taking the time for reading this and if you need any other information please ask.
Equipment: 2x 385 panels in series 8 AWG cable 20 meters from inverter, inverter growatt SPF 3000TL LVM48v, batteries lead acid 4x LTH 205AH 12v in series to make 48v with 6 AWG wire.
Growatt settings: 1-SBU 2-60A 3-N/A 4-off 5- FLD 6-on 7-off 8-120v 9-60hz 10-4 11-30a 12-NA 13- 54v 14- only solar 15-on 16-on 17-on 18- disable 19- 58.4v 20-54v 21-42v 22-enable
Locatation- 15N 96W very light rain season
I installed my system in October 6 months ago, for the first week i didn't have anything heavy connected just maybe 20w worth of LEDS. After a week i connected a fridge and was having low voltage problems straight away, i checked the batteries one by one and two out of four where not holding charge. No problem trip to the supplier and they where changed with the warranty they came with. Now 6 months have passed and last week at 6am my system alarm went off for low voltage (44v), this week i have been having to unplug the fridge so that the alarm doesn't go off. When i checked in the night time one is dead only 10.3 while others are 12.5. the battery that's only reading 10.3 is one that was replaced already and since i claimed the warranty i don't get any on this one so i will need to buy a new battery. I got a new battery a few weeks ago and noticed that in the evening the voltage number where a little lower then before i started having an issue but not low enough to trigger the alarm until 1 week had passed. Before having a problem as well the batteries would normally finish charging at 2pm and i would notice every afternoon for a few hours the growatt making a clicking sound. when i would try to see the error message it would be gone until after months i finally saw it number 3 for over charge. I'm guessing that after fully charging the growatt kept trying to charge them then over load protection went off for a few months everyday causing my damage to my batteries causing one to die. After replacing the battery i have been checking the system between 12-4 pm most afternoons to see what's going on to make sure its not setting the overload protection off on repeat again, it isn't overcharging anymore but its failing to get to the Contest Voltage charging stage some days. Important note about the fridge, i have the growatt data from the dongle so i can see the watt output throughout the day and the fridge turns on an hour then off an hour approx. to maintain temperate. Since changing the battery the data is showing the fridge on constantly, ive made a few tests: if i turn the thermostat inside the fridge down it turns off for a little while before turning back on to cool down again. I've thought about it and the fridge is making noise a lot more lately. This could also be because spring/summer is coming and its getting hotter but i live in the tropics so i don't really have a change
Need help understanding if its a system problem or if its the fridge. i understand that the growatt over charging the batteries for a few months would do a lot of damage to them but that isn't happening any more. Maybe i need to change the settings, i did recently learn that there are settings for the flood batteries to stabilize them settings numbers 43, 44, 45, 46, 47, 48. anyone have recommendations on them because i have it turned off at the moment
If you arrived here thanks very much for taking the time for reading this and if you need any other information please ask.
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