Tankless Pressure Pump (Booster Pump) Pressurizing Water from Gravity Fed Storage Tank, Powered by Existing Household Battery Bank

You’ll need a existing 24V battery for this setup, that’s the only voltage the Tankless Pressure Pump controller will accept from batteries. 

Your household solar array powers up the 24V battery bank as usual using the charge controller already in place (C). The TPP charge controller connects directly to the battery bank and pulls off power when needed (B). Your household power system works the same as before, maybe you’re using an inverter like diagram depicts, or a converter. The solar booster pump acts as just another load, so be sure to calculate what your household system can accommodate. 

On properties that have usable elevation change, water can be stored in a tank at a high point of the property, naturally pressurized from gravity (A). A tank must be located 95 feet above the house for gravity to provide 45 psi worth of water pressure. The calculation can be done for any type of elevation using the equation 1 psi = 2.13 feet of head. If your property does not have a steep enough grade, a booster pump takes the incoming psi and BOOSTS the water up to acceptable household levels. 

In this example, let’s say that the tank is 30 feet above the house, meaning gravity flow is producing 14 psi at the house. A Tankless Pressure Pump (B) identifies the incoming psi and boosts water pressure up to 45 psi, good enough for showers, flushing toilets etc.