The figure below uses a low offset operational amplifier OPA335 to form a current source with offset compensation that reduces the effects of the input offset voltages of LOG112 and LOG2112. 
In places where the grid availability is zero or where there are high instances of power cut, Off-grid systems are an apt solution for relief from power cuts and they can be installed with a standalone inverter with a separate or integrated charge controller.
If the off-grid system is designed with appropriate solar panels and Battery, it can supply power throughout the year without ever relying on the grid power. If the system is under designed then the battery is always in very low status. We use inverters from reputed brands like Growatt,Goodwe and HuaWei for our off-grid systems.
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