I have noticed it charges even on very cloudy days .

Always charges even on cloudy days

Difficult to tell at first if it was working due to cloudy days and because CO2 detector and minor vampire circuitry trickle drains the battery

On a hot day the edges of this charger can get hot, so i would advise to leave a window or 2 cracked to let the air flow

Warm days, cold days, heavy rains, 50 mph winds, 3 and 4 days at a time without sunlight

Warm days, cold days, heavy rains, 50 mph winds, 3 and 4 days at a time without sunlight

It takes about a week in normal (mixed) weather to recharge after a good day fishing, but as I mostly only get to the boat on the weekends this is fine for me

Mine is in the window and charged up my motorcycle in a day (cloudy day at that).

is my dump trailer in about two or three days after several dumps Also keeps the winch battery on my car hauler full.

Have been using it since mid winter and it charges with no problem even on cloudy winter days.

Battery still dies after a week or so even with panel in sun light all day

Even charges on the cloudy days.

Decent output even on cloudy days

Doesn't even require a super sunny day to work

Works as it supposed to.

Sometimes seems to work ok sometimes, but it's really hit or miss as to whether the battery is actually charged when the light on the charger says it's charged.

Has worked as I had hoped so far, I will update my review if I have any issues