Check the listing for details. Sun2Solar Deluxe In-Ground Swimming Pool Solar Heater XD2 w/ Bypass Kit. Condition: New. Listed at 289.92 USD. Sun2Solar® - Deluxe In-Ground Swimming Pool Solar Heater XD2 w/ Bypass Kit Item Number: 902535 Heat your pool water the green way using solar energy. Our Sun2Solar® XD2 Pool heater provides an unbeatable price to performance ratio. Add weeks to the swimming season with free energy from the sun. This heater is ideal for use with above ground and most inground pools, and multiple heaters can be connected in series to increase heating efficiency. It's easy to install, requires no electric or gas connections and includes adapters for INTEX® pools. The Bypass Kit is included for pools using 1 HP pump or higher or on any pool application. Note: The XD2 includes basic installation accessories. This item CANNOT be mounted on a roof. Features: Heats your pool to a warm, comfortable temperature Is environment-friendly energy-free from the sun Extend your swim season with luxuriously warm water Dramatically reduces or eliminates pool heating costs Adds value to your pool and to your home Includes protective cover for when heater is not in use Attractive, space saving design Measurements: 30.70" L X 30.70" W X 15.35" H POOL VOLUME DAYS REQUIRED TO HEAT POOL 5°F * Dimensions Gallons 1 Heater 2 Heaters† 3 Heaters† 4 Heaters† 12' Round x 36" Deep 1,779 1.3 0.7 0.4 0.3 15' Round x 48" Deep 3,736 2.8 1.4 0.9 0.7 18' Round x 52" Deep 6,981 5.3 2.6 1.8 1.3 20' Round x 48" Deep 6,640 5.0 2.5 1.7 1.3 24' Round x 52" Deep 12,481 9.5 4.7 3.2 2.4 30' Round x 52" Deep 16,190 12.3 6.1 4.1 3.1 24' x 12' Oval x 52" Deep 8,403 6.4 3.2 2.1 1.6 32' x 16' Rectangular x 52" Deep 14,364 10.9 5.4 3.6 2.7 * Results are based on 10 hours of direct sunshine per day. Results may vary with changes in weather.