solar bulb for night near gate with battery vs pulling wire till gate.

here bulb is common cost. cost required for solar panel and battery are extra cost. assume light required is 3w and it needs to run for 12hours in the night from solar. total watts = 12X3=36 watts solar pannel required = 36/5= 7.2waatts. --- assuming 80% efficiency we need = 9 watt solar panel battery required = 36WH cost - 1000 to 2000/- with protection circuit

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RUIDENG HD25 HD35 adjustable DC load tester 5-20 volt 35 watt Load tester for batteries with voltage current display

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