Now you can use clean, renewable energy with Solartech solar panels. These high quality solar panels can be used in single panel setups or multipanel systems. Actual dimensions are 21.3″x38.9″ and includes 3′ of power cable attached. These panels can be used for 12V battery charging or in conjunction with an inverter for 110AC power. You can wire them in parallel to maintain 12V charging or wire them in parallel for 24V and higher charging.