Battery

Running Load of 150Ah - C10 Battery

150Ah - C10
150/10=15Amps
15*12v= 180 watts
Inverter Consumption 30-40watts
180-40 = 140 watts
140 watts*2 Battery = 280watts

Caution
 If Battery Exceeds this load or taking higher amps Battery gets over heated and life time gets reduced

Backup

150 AH battery at C10 will last for 10 hours on a load of 15 Amps
140*10= 1400 watts Total Power we can Store

Different Battery Rating Comparison

A 150 AH battery at C20, will last for 20 hours on a load of 7.5 A. 
A 150 AH battery at C10 will last for 10 hours on a load of 15 A.
A 150 AH battery at C5 will last for 5 hours at a load of 30 A.

Solar Panel

UTL Gamma+ MPPT Inverter

1 Battery 24v Panel can be used

Rs.36000 Starting
Heliac
165*4 watts panel =660
150Ah 36+24 month warranty
150-200 Units