20A PWM Solar Charge Controller with Double MOS Anti-backflow and LCD Display, Auto 12V 24V PWM Solar Regulator for Off-grid Systems

The FT-S1220 is a 20A PWM solar regulator engineered for off-grid photovoltaic power systems. It automatically identifies 12V or 24V battery voltage and is compatible with three mainstream battery chemistries. The unit adopts a double MOS anti-backflow design to prevent reverse current drain overnight. Users can read and adjust charging and discharging parameters via the integrated LCD panel.

1. Multi-battery compatibility: Supports B01 Lead Acid, B02 3S Lithium-ion, and B03 4S LiFePO4 battery packs.
2. Non-volatile memory: Retains all custom settings after power loss, eliminating the need for repeated resets.
3. Clear LCD dashboard: Monitors real-time charging data; charging thresholds are user-adjustable.
4. Optimized 3-stage PWM charging logic: Constant current, constant voltage, and float charge for extended battery lifespan.
5. Comprehensive safety mechanisms: Overcurrent, short-circuit, open-circuit, and battery reverse polarity protection.
6. Dual MOS anti-reverse circuit: Prevents battery current from flowing backward into solar panels at night, avoiding wasted stored energy.

• Auto 12/24V detection simplifies system installation
• Flexible battery mode selection for different energy storage solutions
• 5V/2A USB port to charge mobile devices directly
• Double MOS tube structure delivers lower heat and higher reliability
• Complete protective functions to secure the solar system
• Factory wholesale available with custom logo, packaging, and parameter setting

With over two decades of specialization in solar photovoltaic innovation, we engineer high-efficiency solar power inverters using cutting-edge production technologies. Our robust R&D team and international certifications (ISO, CE) ensure reliable renewable energy solutions for global markets. Sunchonglic provides cost-effective, sustainable energy solutions with optimized European distribution networks.

Our products are widely recognized and trusted by clients worldwide, meeting continuously changing economic and social needs. We sincerely welcome new and existing customers to contact us for future business relationships and mutual success.