Hey there,
i've just signed up to this board (but read a lot before in here). I'm living in central Gemany without any energy form the grid. Since 9 month my 220Wp solar panel charging a stack of 3s60p 18650 batterys without any issues. Yesterday, after drawing a lot of energy (while rain falls), i have to notice, that the voltage drops under 10V. Thus, i've disconneted the load. Today, the voltage drops down to 8.7 Volt without any load :s According to my powermeter on the charge controller, there was no energy pushed in the batteries, although the sun was shining. I've decided to disconect the battery from the system.
I'm using a Epever 3210A (30A) Solar Charge Controller. The 3s60p was builded of 1200-2500mA 18650 batterys and is balanced via BMS. I've entered the following battery settings to the charge controller:
Over voltage disconnect: 12.6V
Overvoltage reconnect: 12.5V
Equalization charge: 12.5v (equalization time set to 0 minutes)
Float charge: 12.5V
Boost reconnect 11.4V (Boost reconnect duration set to 120 minutes)
Charging limit: 12.5V
Discharge limit: 9.6V
Low voltage disconnect: 9.8v
Low voltage reconnect: 10.2v
Under volt reconnect: 9.8v
Under volt warning: 10.0v
That worked good for me in the summertime. But after a few rainy days and drawing a lot of energy, the stated issues appear. I'm confused about the low disconnect voltage at 9.8V. I thought, the charge controller will disconnect the load, untill the solar panels charged the battery up above 10.2V? But the controller didn't charged the batterys at all, although there was visible sunlight on the panels (perhaps 50W) and the displayed voltage was 35V,but no current (0A, 0.02W) flew into the battery. And is the charge controller drawing that much energy in the standby-state, so that the voltage drops down to 8.7V?
If there is any direct sunlight on the panels tomorrow, i'm going to hook up the system again, after checking all connections/fuses. But do you have some suggestions for solving this problem?
In the meantime i've a cozy candlelight evening
Thanks!
Klaus
i've just signed up to this board (but read a lot before in here). I'm living in central Gemany without any energy form the grid. Since 9 month my 220Wp solar panel charging a stack of 3s60p 18650 batterys without any issues. Yesterday, after drawing a lot of energy (while rain falls), i have to notice, that the voltage drops under 10V. Thus, i've disconneted the load. Today, the voltage drops down to 8.7 Volt without any load :s According to my powermeter on the charge controller, there was no energy pushed in the batteries, although the sun was shining. I've decided to disconect the battery from the system.
I'm using a Epever 3210A (30A) Solar Charge Controller. The 3s60p was builded of 1200-2500mA 18650 batterys and is balanced via BMS. I've entered the following battery settings to the charge controller:
Over voltage disconnect: 12.6V
Overvoltage reconnect: 12.5V
Equalization charge: 12.5v (equalization time set to 0 minutes)
Float charge: 12.5V
Boost reconnect 11.4V (Boost reconnect duration set to 120 minutes)
Charging limit: 12.5V
Discharge limit: 9.6V
Low voltage disconnect: 9.8v
Low voltage reconnect: 10.2v
Under volt reconnect: 9.8v
Under volt warning: 10.0v
That worked good for me in the summertime. But after a few rainy days and drawing a lot of energy, the stated issues appear. I'm confused about the low disconnect voltage at 9.8V. I thought, the charge controller will disconnect the load, untill the solar panels charged the battery up above 10.2V? But the controller didn't charged the batterys at all, although there was visible sunlight on the panels (perhaps 50W) and the displayed voltage was 35V,but no current (0A, 0.02W) flew into the battery. And is the charge controller drawing that much energy in the standby-state, so that the voltage drops down to 8.7V?
If there is any direct sunlight on the panels tomorrow, i'm going to hook up the system again, after checking all connections/fuses. But do you have some suggestions for solving this problem?
In the meantime i've a cozy candlelight evening
Thanks!
Klaus