POWOXI-Upgraded-20W-Solar-Battery-Charger-Maintainer, External Smart 3-Stages PWM Charge Controller, 12V Solar Panel Trickle Charging Kit for Car, Marine, Motorcycle, RV, etc

like others I was getting 2nd Battery Low alarm on my VW Campervan. Previously I have charged the battery using a mains charger. However once I am away camping for any length of time I get the dreaded warning.I decided to give this a go. It comes with a controller and various means of connecting to battery. I already had a lead with a plug attached to the battery so I could have connected to this. It turns out that the Cigarette lighter in the front of my van is always on. I therefore decided to use this.No problems at all as soon as I plugged it it in it was indicating charging. After a few hours it indicated chargedSo whilst at home I will leave this permanently connected. Likewise when on site I will do the same.I wish that a carry case was available so I could store it whilst on the move. It’s an awkward size, pity it wasn’t oblong rather than square then a laptop case could be used.Nonetheless I am extremely pleased with this and looks like my low battery warnings will be. A thing if the past.

Just what I needed to trickle charge our motor home cab battery, placed it behind the wind shield and plugged it in to the cig lighter! Works a treat

Good value and it works. Currently keeping my motorbike battery charging

Keep my off roader battery up on charge which it does very well.

Total waste of money bike had a full charge two weeks ago, this product shows as charging but isn't.

It is a great size and portable. The cable is just the right thickness so I can close my van door and lock it leaving it to charge my leisure battery. Good value and functionality and very easy to use.

Bought to maintain classic car battery between use. pre install tested on two mini-12V lead acids - pre-charged as delivered so charge level unknown. Took 2-3 days to charge each one to get Green LED on but panel was only vertical in dining room window (facing SW) so OK it works as expected. Bought with panel a long twin lead with matching connectors. Took it to the remote garage to install as a fixture and:seemed nothing worked ??? Well, (1) put your voltmeter on 200V DC as O/C panel output > 20V DC - in high sunlight about 27-30V so safe; (2) Get the extension cable the right way round so it fits panel AND control unit - then mark cable so next time not stupid , And behold - even in the garage panel controller showed charging tho probably take forever . (3) It's quite a big panel and needs to be in sunlight for as much as possible but wet-weather protected so an off-ground lectern support with a clear glass panel over the solar element and some waterproof tape around the panel - long cable joint would be advisable.And Classic car happy too!

Seems to so the job ok but the stand is a very poor weak bit of flimsy wobbly thin plastic. The controller is a very plasticky bit of really cheap Chinese rubbish with very poor efficiency.