abdallah.91
New Member
- Joined
- Sep 11, 2021
- Messages
- 45
Hello everybody,
6 weeks ago I installed my solar system 12 panels 405w from Trinasolar with Must hybrid inverter 5000W 48V (PH18-5048 Plus) , I used it for around 4 weeks without batteries, actually with 4 damaged car battery that give voltage without amperage just because the inverter could not work without batteries so I was using it during the day light until I bought 4 batteries 200Ah C20 tall tubular from Maxma (TAF C20 200Ah) which is very known and famous in our country. during the 2 weeks هt didn't cross my mind to test their capacity under big load so normally during the night my average power is around 250w with no more 500w on maximum therefore my consumption during the night never exceed 1.5 KWh.
Recently I was turned water tank heater during the sunset when the grid was available before the grid goes out and become off-grid, 20 minutes the inverter beeped and the battery voltage down under 45.5V I don't remember exactly. yesterday I hoped to check the batteries capacity status so I fully charged them and tried them under 1500W resistive load, the bad surprise that inverter started beeping 25 minutes after I started my test. attached are some screenshots declaring my test status since 9.00AM when the charging current was 20A which is the limit that I put, until the night when I started the test.
now what I am thinking about is to test each battery capacity after fully charging them during the sunny day and use an 1200W inverter with resistive load 400W and write each 20 min the battery voltage and current. do you see it a good way to test them? is it ok to re-use in series after that discharge? no need to balance them?
I appreciate you help.
Regards
6 weeks ago I installed my solar system 12 panels 405w from Trinasolar with Must hybrid inverter 5000W 48V (PH18-5048 Plus) , I used it for around 4 weeks without batteries, actually with 4 damaged car battery that give voltage without amperage just because the inverter could not work without batteries so I was using it during the day light until I bought 4 batteries 200Ah C20 tall tubular from Maxma (TAF C20 200Ah) which is very known and famous in our country. during the 2 weeks هt didn't cross my mind to test their capacity under big load so normally during the night my average power is around 250w with no more 500w on maximum therefore my consumption during the night never exceed 1.5 KWh.
Recently I was turned water tank heater during the sunset when the grid was available before the grid goes out and become off-grid, 20 minutes the inverter beeped and the battery voltage down under 45.5V I don't remember exactly. yesterday I hoped to check the batteries capacity status so I fully charged them and tried them under 1500W resistive load, the bad surprise that inverter started beeping 25 minutes after I started my test. attached are some screenshots declaring my test status since 9.00AM when the charging current was 20A which is the limit that I put, until the night when I started the test.
now what I am thinking about is to test each battery capacity after fully charging them during the sunny day and use an 1200W inverter with resistive load 400W and write each 20 min the battery voltage and current. do you see it a good way to test them? is it ok to re-use in series after that discharge? no need to balance them?
I appreciate you help.
Regards