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The device seems robustly constructed and mine will deliver over 80 mA into a 12v battery in good October sunshine, with the device behind a clear glass window. I have no doubt this would be higher on a summer day. Charge current is only a couple of milliamps in dull weather. That's better than no charge at all, but don't expect to charge a flat battery in dull weather! The fact that it comes with both cigarette lighter plug AND croc-clip leads is very useful. Both of these include fuses, which is a nice safety feature. The blue LED flashes even in dim light, but under those conditions there isn't enough voltage to charge a 12v battery. It would be enough to charge a lower voltage battery in dull conditions, although it may need a current limiting resistor. A previous reviewer suggested there might be "drawback" (reverse current flow) at night, but there is definitely none.Read full review
Verified purchase: Yes | Condition: New
Doesn't seem to work. It produces voltage in daylight but the battery still goes flat over time. Maybe it's drawing back when it's dark? Tried on two batteries to eliminate faulty battery possibility but got the same result. Mentioned it to the guy who does my MOT's and he had exactly the same experience with a solar charger on his boat.
Verified purchase: Yes | Condition: New
This does not put out enough charge to re-charge a battery but will keep an already charged battery nicely topped up and keep it from going dead. I had no joy with the cigarette plug despite it being live with the ignition off. This may be due to my vehicle wiring though ? Only allowing current to flow one way ? Maybe ? I had to disconnect the battery and leave it inside the vehicle, connected directly with the clips, but it has been kept fully charged.
Verified purchase: Yes | Condition: New
Bought this for my wife's car that goes out maybe twice a week. Plug it into the cigarette lighter and stick it on the dashboard. It will keep the battery nicely topped up. Cracking bit of kit.
Verified purchase: Yes | Condition: New
It kept my car battery going while attached to my electric fence
Verified purchase: Yes | Condition: New