User manual for the Harsen BC7051 charger, describing operation, indicators, adjustable settings, specifications and wiring.
The BC7051 is an automatic constant‑variable‑current charger designed for 12 V and 24 V batteries used in generator start‑up. It charges with constant current until the battery voltage reaches a preset value, then reduces current gradually to a trickle level that only offsets self‑discharge, protecting battery life.
The manual explains the indicator lights (RED MAINS, CONNECTED BATTERY, LOAD BATTERY, LOW BATTERY, FUSIBLE), the voltage and current adjustment potentiometers, technical specifications, physical dimensions and a typical wiring diagram. This manual is written in Chinese.
| Battery type | 12 V, 24 V |
|---|---|
| Low battery voltage warning | 10 V (12 V), 21 V (24 V) |
| Low battery voltage stop charge | 8 V (12 V), 16 V (24 V) |
| Trickle charge threshold | 10‑15 V (12 V), 22‑33 V adjustable (24 V) |
| Charge current | 0‑5 A adjustable |
| Over‑current protection | >6.3 A |
| Input voltage | 220 VAC (-15% ~ 30%) |
| Input frequency | 45 Hz ~ 60 Hz |
| Power consumption | ≤220 W |
| Operating temperature | -20 °C ~ 50 °C |
| Overall size | 120 × 100 × 128 mm |
It charges with constant current until the battery voltage reaches the preset value, then the current gradually decreases and finally switches to a low‑current trickle charge that only offsets self‑discharge.