Ideal for electric vehicle charging stations, home emergency backup power supplies, solar irrigation systems, and audio systems. You don't have to worry about being unable to charge the battery on cloudy days because the long battery life will bring you stable power. Additional Details ------------------------------ Bullet point: 【Large Capacity】BT200 batteries can be connected in parallel and series for larger capacity and higher voltage. Maximum series connection: max. 2 identical cells, max. 24 V. Parallel: Up to 2 identical batteries with capacity up to 400Ah. Series and parallel connection makes it ideal for caravans, solar systems, home storage and off-grid applications. Product description: Ideal for electric vehicle charging stations, home emergency backup power supplies, solar irrigation systems, and audio systems. You don't have to worry about being unable to charge the battery on cloudy days because the long battery life will bring you stable power.