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Most likely, this is where I went wrong.

close to 3m between solar and charge controller, 1.5m between battery and charge controller and the furthest lamp is more than 5m

I don't understand why this charge controller displays fully charged battery on sunny days but the battery drains so quickly upon loading with 4 dc lamps 3watts each. The battery capacity is N70. Solar capacity is 40 watts. Let me also know if my charge controller is connected properly.

Thank you for this reply. However, my charge controller blinks (green) during sunny days between 11 am upto 4pm when there is 0 load on the battery. This happens most of the days. My assumption is that when my PWM charge controller blinks, the battery is fully charged. Now, the battery flattens...

I think this is helpful.

I have installed a 40watt panel with Solar Charge Controller PWM,12V/24V 10A,12V/24V 20A,12V/24V 30A and a 12v 75ah new Chloride exide free maintenance car battery. Despite limiting my usage to four 3w dc lamps for lighting between 6.30pm to 7.00 am the battery is low (red indicator in charge...