This article provides a detailed guide on configuring the SMH-II-2.2KW-12V-WIFI inverter for a solar-powered off-grid or hybrid system in Ireland. The configuration is based on a 12V system using LiFePO4 (Lithium Iron Phosphate) batteries and solar panels, specifically suited to Ireland’s electrical grid and climatic conditions.
System Overview
Battery System:
- Battery Type: LiFePO4 (Lithium Iron Phosphate)
- Capacity: 12V 100Ah (4 x 3.2V 100Ah cells in series)
- Nominal Voltage: 12.8V
- Fully Charged Voltage: 14.6V
- BMS: 4S 12V 100A LiFePO4 BMS
Solar Panels:
- Topsolar 200W Panels (Two Kits = 4 panels total) this setup is for limited space
- Panel Configuration: Series connection to reach higher voltages for optimal inverter operation
- Maximum Output Power: 800W total (4 x 200W)
Location-Specific Configuration:
- Ireland operates on 230V and 50Hz AC output.
Recommended Inverter Settings
Here are the recommended settings for the SMH-II-2.2KW-12V-WIFI inverter to optimize performance based on your battery, solar panel setup, and Ireland’s grid standards:
| Program No. | Setting | Description |
|---|---|---|
| 00 | ESC | Exit setting mode |
| 01 | SBU | Prioritizes solar and battery before using utility power (Solar-Battery-Utility) |
| 02 | 60A | Maximum charging current from solar/utility (based on BMS specifications) |
| 03 | APL | AC input voltage range for appliances (wide range, ideal for home use) |
| 04 | SdS | Power-saving mode disabled |
| 05 | USE | User-defined battery type (for custom LiFePO4 settings) |
| 06 | Lrd | Auto-restart after overload disabled (optional based on preferences) |
| 07 | tEd | Auto-restart after overheating disabled (optional) |
| 08 | 220V | Output voltage set to 220V (Ireland uses 230V, so this is within range) |
| 09 | 50Hz | Output frequency set to 50Hz (Ireland’s standard) |
| 10 | PAC | Set maximum utility charging current (30A or 60A depending on setup) |
| 11 | 30A | Utility charging current based on your battery specifications |
| 12 | 11.5V | Voltage for switching back to utility power (discharge threshold) |
| 13 | 12.8V | Voltage for switching back to battery mode when SBU is selected |
| 16 | CSO | Charger source priority (Solar first) |
| 17 | 60A | Maximum charging current from AC source |
| 18 | bON | Alarm control enabled (optional) |
| 19 | ESP | Auto-return to default display enabled (after 1 minute of inactivity) |
| 20 | LON | LCD backlight control enabled |
| 21 | AON | Beep when primary power source is interrupted |
| 22 | bLd | Overload bypass disabled |
| 23 | FEN | Record fault codes for troubleshooting |
Battery Charging Settings
| Program No. | Setting | Description |
|---|---|---|
| 26 | 14.1V | Bulk charging voltage for fast charging |
| 27 | 13.5V | Floating voltage to maintain charge without overcharging |
| 29 | 10.5V | Low DC cutoff voltage to prevent battery damage |
Battery Equalization Settings (Not Recommended for LiFePO4)
| Program No. | Setting | Description |
|---|---|---|
| 33 | EdS | Battery equalization disabled (LiFePO4 batteries do not require equalization) |
| 39 | AdS | Equalization activated immediately (Ensure this is disabled) |
Download the Manual here:
Conclusion
For your setup, using 4 Topsolar 200W panels in series ensures the inverter operates within its MPPT voltage range. The battery system, configured with a LiFePO4 battery pack, is optimized for long life and stable operation. Make sure to configure the inverter’s settings as per the table above for best performance in Ireland’s electrical grid.
If you have any questions about these settings or your system’s configuration, feel free to ask in the comments!