Site Survey $150.00 / Inverter adder $697.00 / Permit Fee $350.00 / Water Heater  50 Gal Hybrid Energy Heat Pump $2695.00 / Enphase Battery 5 KW (ENFIN INLY) $7600.00 / System size under 7kw $950.00 / Main Panel Upgrade  $2500.00