Our system kit includes preassembled brass and di-electric fittings along with custom dip tubes to easily turn any standard water heater into a solar storage tank.

Consequently you avoid paying for an expensive tank along with shipping costs.  You also avoid the risk of breakage during a tank’s shipment (most solar tanks are glass or stone lined). If and when the tank eventually leaks you can easily purchase another inexpensive generic tank at the local hardware/plumbing store.