Hello everyone,
I'm experiencing issues with my inverter when charging by solar my battery with low currents (4A to 5A). I have a Tewaycell 300Ah battery with an LD BMS similar to the Narada BMS.
The problem arises when the inverter is charging at this amperage for a few seconds: the voltage of the inverter's battery fluctuates, causing the battery state of charge (SoC) to indicate 100%.
This voltage discrepancy is different from the BMS battery voltage, which remains constant. I've measured the voltage using a meter on a cable connected to the inverter, which is 5 AWG. However, I haven't checked the cable at the battery connector because it's difficult to access (image attached).
I will also attach a video showing the strange behavior of the inverter voltage. The solar charge is set to a maximum of 6A, and the bulk voltage is 56.4V. You can observe that I shut down the solar switch to restart the test.
the video in on drive link https://drive.google.com/file/d/1_zAyCKv1Q_JVm4JpfknsYHa4JhUEipJa/view?usp=sharing
inverter setup
I'm experiencing issues with my inverter when charging by solar my battery with low currents (4A to 5A). I have a Tewaycell 300Ah battery with an LD BMS similar to the Narada BMS.
The problem arises when the inverter is charging at this amperage for a few seconds: the voltage of the inverter's battery fluctuates, causing the battery state of charge (SoC) to indicate 100%.
This voltage discrepancy is different from the BMS battery voltage, which remains constant. I've measured the voltage using a meter on a cable connected to the inverter, which is 5 AWG. However, I haven't checked the cable at the battery connector because it's difficult to access (image attached).
I will also attach a video showing the strange behavior of the inverter voltage. The solar charge is set to a maximum of 6A, and the bulk voltage is 56.4V. You can observe that I shut down the solar switch to restart the test.
the video in on drive link https://drive.google.com/file/d/1_zAyCKv1Q_JVm4JpfknsYHa4JhUEipJa/view?usp=sharing
inverter setup
| Program | Description | Setting |
| 01 | Output source priority | SBU |
| 02 | Maximum charging current | 70A |
| 03 | AC input voltage range | APL |
| 04 | Power saving mode | DIS |
| 05 | Battery type | LI |
| 06 | Auto restart when overload occurs | DIS |
| 07 | Auto restart when over temperature occurs | DIS |
| 08 | Output voltage | 230V |
| 09 | Output frequency | 50Hz |
| 10 | Number of series batteries connected | 4 |
| 11 | Maximum utility charging current | 2 |
| 12 | Setting voltage point back to utility source | 60% |
| 13 | Setting voltage point back to battery mode | 20% |
| 14 | Charger source priority | OSO |
| 15 | Alarm control | ON |
| 16 | Backlight control | ON |
| 17 | Beeps while primary source is interrupted | OFF |
| 18 | Overload bypass | ENA |
| 19 | C.V. charging voltage | 56.4 |
| 20 | Floating charging voltage | 54 |
| 21 | cut-off voltage | 10 % |
| 28 | Address setting | |
| 37 | Real time setting---Year | |
| 38 | Real time setting---Month | |
| 39 | Real time setting---Date | |
| 40 | Real time setting---Hour | |
| 41 | Real time setting---Minute | |
| 42 | Real time setting---Second | |
| 43 | Battery equalization | DIS |
| 44 | Battery equalization voltage | 58.4 |
| 45 | Battery equalized time | 60 |
| 46 | Battery equalized timeout | 120 |
| 47 | Equalization interval | 30 |
| 48 | Equalization activated immediately | OFF |
| 49 | Utility charging time | 0000 |
| 50 | AC output time | 0000 |
