Solar PV with batteries is a grid tied system with battery back-up, so if the grid goes down you will still have power. The solar PV system with batteries is only recommended if your power goes out often, because the batteries drive the cost up on your PV system. In the right location it is a penny well spent.
Pricing for Grid tie battery back-up (hooked up with the utility)
11kWh cost : $10,000 for the Battery storage
Price to compare Solar PV with batteries
How much power does my house use?
Flat Screen TV= .1 kW/hr, Lights Per Room= .1 kW/hr, Labtop = .05 kW/hr, Refrigerator=1.6 kW/day, Clothes Washer=2.3 kWh each use, Clothes Dryer=3.3kWh each use
For off grid installation starting at a 150 watt solar power and 350 watt inverter power $1,937.80 installed
Pricing for Grid tie battery back-up (hooked up with the utility)
11kWh cost : $10,000 for the Battery storage
Price to compare Solar PV with batteries
How much power does my house use?
Flat Screen TV= .1 kW/hr, Lights Per Room= .1 kW/hr, Labtop = .05 kW/hr, Refrigerator=1.6 kW/day, Clothes Washer=2.3 kWh each use, Clothes Dryer=3.3kWh each use
For off grid installation starting at a 150 watt solar power and 350 watt inverter power $1,937.80 installed
11.76 kWh battery back-up system
4-12 volt 245ah AGM (D8) Deka Solar Batteries 1-MIDNITE SOLAR battery cabinet 2/0 battery cable 48 volts system 175 amp DC breaker at 48 volts 60 amp AC breaker at 125 volts 
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