SolarBear Panel 3’9 x 20’2. The Solar Bear extends your swim season by heating your pool to a warm, comfortable temperature from Spring through Fall using FREE energy from the sun! Solar pool heater for above ground pools. 3’9 x 20′ solar thermal panel. Built-in manual bypass valve for turning the system on and off. Raises your pool water temperature up to 10 degrees. Compatible with any pool pump. Made in the USA. For more info contact. Mark’s Pool Store. Over 40 Years Experience. Answer them in a timely manner. Thank you for looking..