Yes, a 400W solar panel can charge a 200Ah battery under ideal conditions. If you receive about 4~5 hours of sunlight daily, the panel could produce around 1600~2000Wh per day. It may take approximately 1.5 days to fully charge from empty but consider efficiency losses in your calculations.
[pdf] The Wind-Solar Storage-Charging System is a cutting-edge, integrated solution that combines solar and wind power with energy storage and charging infrastructure, enabling highly efficient energy use and optimized resource configuration.
[pdf] A solar hybrid inverter combines the functions of a charge controller, inverter, and sometimes even a battery management system into a single unit. This integration simplifies the installation process while reducing the overall footprint of the system.
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