The number of series connections is not limited, but the number of parallel connections cannot exceed 4 groups (too many parallel connections will cause voltage and current imbalance).
The product has a one-year warranty, and free accessory replacement and technical consultation are provided within one year. Please refer to the link below for specific details.
https://www.vevor.com/pages/return-policy
Can one of these be pair with VEVOR 800W Wind Turbine Generator, 12V Wind Turbine Kit, 3-Blade Wind Power Generator? If so how many 800w wind turbines can one of these handle safely?