The aim of the thesis is to development the Self –Consumption Solar PV System combined cooling heating and power (CH1000). Let its function like HyPV(Hybrid PV system) and lower the cost drastically. In order to lower the cost of CH1000, we delete a lot of measuring functions except for battery measuring. So the one goal of the study is to estimate the SOC (State of Charge) by battery voltage as good as possible. On the other hand, we set up the system with hot water storage tanks to test the effect of this system.