Sterling Power
Sterling Power PCU1250 – Pro Charge Ultra 12V 50A Battery Charger
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The Sterling Power PCU1250 is a 12V 50A mains battery charger from the Pro Charge Ultra 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 your batteries are charged correctly and held at the right float.
Charging Specifications
| Type | AC-input multi-stage battery charger (Pro Charge Ultra) |
|---|---|
| Nominal output voltage | 12V |
| Max output current | 50A |
| AC input | Wide-range AC mains, 50/60 Hz |
| AC input voltage / frequency range | 90–270V AC, 40–70Hz |
| Charge profile | Multi-stage (bulk, absorption, float) |
| Charge profiles | 11 pre-programmed profiles including LiFePO4/lithium (AGM, Gel, Lead Acid, LiFePO4), plus 1 user-customizable profile |
| Battery types | Lead-acid, AGM, gel, and lithium (LiFePO4) |
| Efficiency & Power Factor | 90.4% efficiency; Power Factor 0.976 @ 230V (Power Factor Correction rated 0.99) |
| Full-load AC current draw | 9.8A @ 110V / 4.6A @ 230V |
| Ripple noise & ground leakage | 14mV RMS ripple noise; 0.5mA ground leakage |
| Ingress protection | IP22 |
| Recommended generator size | ~1500W for cold start (unit draws ~750W continuous) |
| Certifications | UL certified; ABYC drip-test compliant |
| Dimensions, weight & outputs | 315 × 215 × 90mm; 3.0kg; 3 isolated charge outputs |
| Warranty | Backed by Sterling's factory warranty |
Key Features
- 12V 50A multi-stage mains charging
- Correct, complete charging for lead-acid, AGM, and gel banks
- Compact, robust switch-mode design
- 11 pre-programmed profiles including LiFePO4/lithium (AGM, Gel, Lead Acid, LiFePO4), plus 1 user-customizable profile
- Automatic desulphation/equalization cycle every 7–10 days; progressive absorption charging algorithm; temperature compensation with high-temperature shutdown
- Programmable power reduction at 100%/75%/50%/25%
- 32-LED information panel with dual LED digital meters
- Optional remote control up to 30 ft, multi-lingual
- Redundant high-voltage protection; BMS shutdown capability; Power Supply Relay integration
- Variable-speed thermostatic cooling designed for reduced fan noise
- Power Factor Correction rated 0.99; synchronized MOSFET rectification
Presented by Overland Kitted
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