Hello everyone,
I have a small Off grid solar unit at home.
It consists of 2x 400W solar panels (40V rated at 5.3A, 44VOC)
I am using a small MPPT charge controller as below-
https://www.urjakart.com/systellar-2...ontroller.html
The system had been working happily since last 2 years. It generates about 20A in Midday sun for 12v FLA batteries. The MPPT would place panels near 36~38V, suck about 8~9 Amps and convert it to 18~20A into 12v Lead acid batteries for charging.
However, Since a few weeks I am noticing that MPPT is behaving more like PWM.
Panel voltage is roughly near 14.5 to 15v at all times of the day. Amps near 8~9A.
As a result I get only half the amps that I had paid for. If I disconnect the charger, panels jump back to 40V.
I have tried disconnecting everything, let MPPT cool overnight (I assumed it could be due to overheating or software hang) but it has'nt improved this morning.
Please help.
I have a small Off grid solar unit at home.
It consists of 2x 400W solar panels (40V rated at 5.3A, 44VOC)
I am using a small MPPT charge controller as below-
https://www.urjakart.com/systellar-2...ontroller.html
The system had been working happily since last 2 years. It generates about 20A in Midday sun for 12v FLA batteries. The MPPT would place panels near 36~38V, suck about 8~9 Amps and convert it to 18~20A into 12v Lead acid batteries for charging.
However, Since a few weeks I am noticing that MPPT is behaving more like PWM.
Panel voltage is roughly near 14.5 to 15v at all times of the day. Amps near 8~9A.
As a result I get only half the amps that I had paid for. If I disconnect the charger, panels jump back to 40V.
I have tried disconnecting everything, let MPPT cool overnight (I assumed it could be due to overheating or software hang) but it has'nt improved this morning.
Please help.
Comment