WindyNation 400 Watt Solar Panel Kit with 400ah AGM Battery New - SOK-400WP-P30L-400B

WindyNation  400 Watt Solar Panel Kit with 400ah AGM Battery New - SOK-400WP-P30L-400B

The Windy Nation 400-Watt Complete Solar Charging Kit and 400Ah Battery Bank comes with everything you need to start producing free, clean power from the sun. Perfect for RV's, boats, cabins and back-up power. WindyNation's 400-Watt Solar Kit with batteries includes everything you need to get started: four 100-Watt Polycrystalline Solar Panels, four 100Ah AGM Deep Cycle Batteries with 2/0 AWG Interconnect Cables, 30 Amp P30L Solar Charge Controller, 40 ft. of UL Listed 12 AWG Solar Cable, all necessary MC4 Connectors for wiring and all the necessary mounting hardware. Product photos above show pictures of all the included items and additional technical information. The WindyNation 400-Watt Solar Charging Kit is the ideal solution for providing back-up power or off-grid power when you need it. Solar panels will provide on average 1700 Watt Hours (Wh) or 150 Amp hours of charge per day (depends on sunlight availability)

What our Experts Think  

• High-Capacity Off-Grid Power Kit: The WindyNation 400W Solar Panel Kit with 400Ah AGM battery is designed for serious off-grid energy storage and longer runtime for essential appliances.
• Large Battery Storage Advantage: The included 400Ah AGM battery bank provides substantial energy reserve, making it suitable for overnight use and cloudy-day backup.
• Reliable 12V System Design: Built for RVs, cabins, marine use, and remote setups, delivering stable DC power for lighting, electronics, and small appliances.
• Expandable Solar Input (400W Panels): Captures strong daily solar generation potential, helping maintain battery charge across extended use periods.
• Complete Off-Grid Bundle: Typically includes panels, charge controller, wiring, and battery integration components for a ready-to-install system.
• Maintenance-Free AGM Technology: Sealed batteries require no watering and offer stable, durable performance in varied environments.

                 
Q&A   

Maintenance Tips    

• Clean solar panels regularly with water and a soft cloth to remove dust, dirt, and debris for maximum output.
• Inspect panels for cracks, loose mounts, or corrosion after storms or high winds.
• Keep MC4 connectors and wiring tight, dry, and free from corrosion or sand buildup.
• Ensure panels are not shaded during peak sun hours to maintain charging efficiency.
• Monitor charge controller settings to ensure proper AGM charging profile is enabled.
• Check battery voltage regularly; avoid deep discharge below recommended levels to extend AGM lifespan.
• Keep AGM batteries in a cool, ventilated, and dry location to prevent overheating and swelling.
• Inspect battery terminals monthly; clean and tighten connections to prevent power loss or heat buildup.
• Do not overcharge batteries—ensure charge controller is functioning correctly.
• Secure all mounting hardware to withstand vibration, wind, and environmental stress.
• Keep inverter and controller ventilation areas clear of dust and obstruction.
• Avoid placing heavy loads continuously near system limits; balance usage to protect battery health.
• Perform periodic full system checks (voltage, charging rate, load output) for optimal performance.