5KW Solar System Sizing with Battery and Inverter: Waaree Panels
Complete Guide to Sizing a 5KW Solar System with Battery & Inverter
If you’re planning to install a 5KW solar power system, ensuring the right solar panel capacity, inverter, and battery backup is essential. Using Waaree ELITE SERIES BiN-08-570 to BiN-08-600 panels, this guide breaks down everything you need for an optimized setup.
1. Solar Panel Selection
From the provided Waaree panel specifications, here are the key options:
| Model | Power (W) | Voltage (Vmp) | Current (Imp) | Efficiency (%) |
|---|---|---|---|---|
| BiN-08-570 | 570W | 43.71V | 13.04A | 22.07% |
| BiN-08-580 | 580W | 44.01V | 13.18A | 22.45% |
| BiN-08-600 | 600W | 44.61V | 13.45A | 23.23% |
For a 5KW setup, we opt for 580W panels as they offer a balance between efficiency and cost.
Number of Panels Calculation
Thus, 9 x 580W panels will generate 5.2KW under standard conditions.
2. Inverter Sizing
The inverter converts DC power from panels into AC power for household use.
Key Considerations
- Power Rating: At least 5KW (recommended 5.5KW for safety margin).
- Voltage Matching: The panels operate at 44.01V (Vmp).
- Series vs. Parallel Configuration:
- Series: Increases voltage.
- Parallel: Increases current.
Connection Plan
We choose a 96V DC inverter with 9 panels arranged as 3 strings of 3 panels:
Recommended Inverter
✅ 5KW Pure Sine Wave Inverter, 96V DC Input
3. Battery Bank Sizing
Battery backup ensures power availability at night or during outages.
Battery Type Selection
- Lead-Acid: Cheaper but bulkier and shorter lifespan.
- Lithium-ion: More efficient and longer-lasting.
Battery Configuration
- Lead-Acid Option: 4 x 12V (260Ah) batteries in series to get 48V, 260Ah.
- Lithium-ion Option: 2 x 48V (130Ah) batteries in parallel.
4. Charge Controller Sizing
MPPT charge controllers regulate solar charging to batteries.
Recommended MPPT Controller
✅ 96V, 60A MPPT Charge Controller
5. Summary of Components
| Component | Specification |
|---|---|
| Solar Panels | 9 x 580W Waaree Panels (Total 5.2KW) |
| Inverter | 5KW, 96V, Pure Sine Wave |
| Battery Bank | 260Ah, 96V (Lead-Acid or Lithium-ion) |
| Charge Controller | MPPT 96V, 60A |
Final Thoughts
A 5KW solar system with the right inverter and battery backup provides reliable power for homes or businesses. This setup is scalable and can be optimized for grid-tied or off-grid applications.
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