Stainless heat coils built to resist burn out. Tankless is the perfect backup for your solar hot water heater. Heating water consumes more energy that any other household appliance. As much as air conditioning and heat. No wonder, we use a lot of hot water and waste a lot of energy in the way we supply it.
Most homes use a storage type water heater.
An insulated tank with an electric or gas heating unit. It heats 40 to 80 gallons of water and keeps it hot day and night. Therefore, wasting money to heat again. When a hot water tap is opened the cold water entering the heater passes through the first heat chamber from right to left over the first thermostat turning on the first electrical heat coil. Heating the water up to 125 F as it passes directly over it.