Battery-Max Lite Combiner Box Basic Technical Requirement
The key parameters of the combiner boxes could be read below. Please also follow the local, state, provincial, federal, or national laws, regulations, and instructions from the inverter manufacturer to choose the right combiner box.
General Data
| Max. Connection of Battery-Max Lite Cabinets | 3 |
| Max. Input Current per Battery Cabinet | 100 A (25°C) |
| Max. Output Current | 300 A (25°C) |
| DC Input Fuse per String (Optional) [1] | Rated voltage 1500 VDC, rated current 160 A |
| DC Output Fuse (Optional) [1] | Rated voltage 1500 VDC, rated current 550 A |
| Maximum Operating Voltage (Un) | 1500 VDC |
| Rated Insulation Voltage (Ui) | 1500 VDC |
| Enclosure Protection Rating | IP55 |
| Operating Temperature | -20 °C to +50 °C |
DC Input Data
| Maximum number of battery cabinets | 3 |
| DC conductor cross-section | 25 mm² |
| Ground cable cross-section | 16 mm² |
DC Output Data
| DC conductor cross-section | 150 mm² or 2×70 mm² in parallel |
| Ground cable cross-section | 50 mm² |
[1] The fuse is not mandatory, but recommended.
Notes:
- An appropriate cable gland is required between the cable and the combiner box to ensure that the protection level of the junction box reaches IP55.
- The recommended block circuit diagram of the combiner box could be read below.
Block Circuit Diagram Description:
The diagram illustrates the internal circuit configuration. It shows three positive DC inputs (labeled 1-B+, 2-B+, 3-B+), each protected by a 160A fuse, connecting to a main positive output terminal (P+). Three negative DC inputs (labeled 1-B-, 2-B-, 3-B-) connect to a main negative output terminal (P-). Protective earth (PE) connections (PE1, PE2, PE3) are also indicated. A 550A fuse is placed between the negative output terminal (P-) and the ground connection symbol.
