Compact Smart PWM Solar Battery Charger Controller
A compact, weatherproof PWM solar charge controller that automatically protects and charges a wide range of rechargeable lead?acid and LiFePO4 batteries. Designed for simple wall mounting, low power draw at night, and reliable operation in outdoor environments.
Benefits
Keep batteries healthier longer with smart, temperature?compensated charging that prevents overcharge and undercharge.
Spend less time maintaining batteries — automatic charge modes and LED status indicators show battery condition at a glance.
Install quickly and confidently thanks to simple mounting hardware and common positive grounding.
Reduce downtime and risk of damage with built?in protections (overvoltage, short circuit, reverse polarity, thermal).
Use the same controller across systems — supports multiple battery types including Flooded, AGM, GEL, and LiFePO4.
Operate outdoors without worry: waterproof enclosure, corrosion?resistant terminals, and conformal coated circuitry protect against moisture and corrosion.
Features
PWM charging control using MOSFET switching for efficient voltage regulation.
Common positive grounding connection for straightforward system wiring.
Low standby current (about 2 mA) to minimize overnight battery drain.
DIP switch selects battery type and charging profile.
Smart charging stages with soft start, bulk and equalization charging where applicable.
Charging time management and equalization timer (2 hours) to maintain battery health.
LED indicators for battery condition and charging status.
Thermal protection and automatic adjustment to prevent overheating during charging.
Spark?free connection design for safer installation and hookup.
IP65 rated, waterproof housing with corrosion?resistant terminals and conformal coated PCB.
Multiple electronic protections: overvoltage, short circuit, and reverse polarity protection.
Compatible with most rechargeable lead?acid batteries and LiFePO4 chemistry.
Meets CE, EMC and FCC design standards.
Quick mounting using the supplied three plastic spacers and self?tapping screws to a flat surface.
Specifications
Electrical Parameters
Rated solar panel current: Max 8 A
Normal input solar array voltage: 15–22 VDC
Max solar open?circuit array voltage (no load): 25 VDC
Lowest operating voltage (solar or battery side): 9 VDC
Standby current at night: ?2 mA
Maximum voltage drop (panel to battery): 0.25 VDC
Charging Characteristics
Minimum battery starting charge voltage: 3 VDC
Soft start charging voltage: 3–10 ±0.2 VDC
Soft start charging current (50% PWM duty): up to 4 A
Bulk charge voltage: 10–14 ±0.2 VDC
Equalization charge voltage (at 25°C): 15.5 ±0.2 VDC
Equalization timer timeout: 2 hours
Battery temperature compensation coefficient: ?24 mV/°C
Temperature compensation range: ?20°C to +50°C (?4°F to +122°F)
Protection
Over temperature protection during charging: activates at ~65°C (149°F)
Electrical Parts
Input/output terminals: M4
Physical Parameters
Controller material: ABS plastic
Power terminal max stranded wire size: #12 AWG (?3 mm²)
Mounting: vertical wall mounting (use supplied spacers and self?tapping screws)
Ingress protection: IP65 (waterproof)
Net weight: approx. 0.2 kg (0.44 lb)
Conformal coating applied to internal board for moisture resistance
Corrosion?resistant terminals and connectors
Environmental Characteristics
Operating temperature: ?25 to 50°C (?13 to 122°F)
Storage temperature: ?40 to 85°C (?40 to 185°F)
Operating humidity: up to 100% (no condensation)
Battery Compatibility & Compliance
Suitable for: Flooded (WET), AGM, GEL lead?acid batteries and Lithium (LiFePO4)
Designed to meet CE, EMC and FCC standards
Payment & Security
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