






Sterling Power
Sterling Power PCU1250plus – Pro Charge Ultra Plus 12V 50A Battery Charger
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The Sterling Power PCU1250plus is a 12V 50A mains battery charger from the Pro Charge Ultra Plus range — a compact, switch-mode charger built to keep 12V banks properly topped up from shore power or a generator. It delivers a full multi-stage charge rather than a crude constant voltage, so lead, AGM, gel, and lithium banks are charged correctly and held at the right float.
Pro Charge Ultra Plus models add selectable battery profiles (including lithium), advanced diagnostics, and remote-control capability via the PCUR remote.
Charging Specifications
| Type | AC-input multi-stage battery charger (Pro Charge Ultra Plus) |
|---|---|
| Nominal output voltage | 12V |
| Max output current | 50A |
| AC input | 80–270V AC, 40–70Hz (wide-range AC mains) |
| Charge profile | Multi-stage (bulk, absorption, float) |
| Battery types | Lead-acid, AGM, gel, and lithium |
| Remote | Compatible with the PCUR remote control |
| Outputs | 3 isolated charging outputs for independently charging multiple battery banks |
| Efficiency | 90.4% |
| Power Factor | 0.976 @ 230V |
| Ripple noise (RMS) | 14mV |
| Ground leakage | 0.5mA |
| Certifications | UL certified |
| IP Rating | IP22 (splash protection) |
| Dimensions | 315 × 215 × 90mm |
| Weight | 3.0kg |
| Warranty | Backed by Sterling's factory warranty |
Key Features
- 12V 50A multi-stage mains charging for fast, correct battery recovery
- Selectable profiles for lead-acid, AGM, gel, and lithium
- Remote monitoring and control via the PCUR
- 3 isolated charging outputs
- Redundant high-voltage protection, temperature monitoring, and thermal shutdown
- 11 pre-programmed profiles (AGM, Gel, Lead-Acid, LiFePO4) plus 4 user-customizable profiles
- Automatic desulphation cycle every 7–10 days
- Programmable power reduction settings — 100%, 75%, 50%, 25% — useful for limited-capacity generators
- Synchronized rectification via MOSFET technology for improved efficiency over standard diode designs
- 32-LED information panel, dual digital voltage/current meters, and LED power-reserve indicator
- Marine-grade construction — conformal-coated circuit boards, stainless steel/non-ferrous fixtures for corrosion resistance
- BMS shutdown compatibility and positive-signal activation for Power Supply Relay engagement
- Improved end-cap design for high-vibration environments
Presented by Overland Kitted
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