| Number in figure | BMU801 connector name | Purpose |
|---|---|---|
| 1 | Solar 1 | 9–28 V DC input from solar panel 1 1 |
| 2 | Solar 2 | 9–28 V DC input from solar panel 2 1 |
| 3 | DC in | 9–28 V DC input from DC power supply 1 |
| 4 | Batt 1 | Battery 1 connector |
| 6 | NTC | Temperature sensing resistor (NTC) connector |
| 5 | Batt 2 | Battery 2 connector |
| 7 | I/O | Status output |
| 8 | DC out |
Power output Nominal output voltage 24 V 2 |
| 9 | Modbus | Data and control interface |
1 For battery charging, the input
voltage must exceed the battery voltage (15 V DC or higher for optimal
performance).
2 The actual output equals the DC
input voltage, when DC power supply or solar panels are connected. If no DC
power or solar power is available, the output equals the battery
voltage.