ECO-WORTHY10 Watts 12 Volt Solar Trickle Charger Car Battery Maintainer Solar Panel Kit: 1pc 10W 12V Monocrystalline Solar Panel with 10A Charge Controller and Cables for 12 Volt Battery Motorhome

Quite a decent 10W solar panel and a charge controller. I bought it to see if it can charge or at least keep my car battery topped up while not driving it for an extended period of time.I had the solar panel (10W) at ~15:00 April UK (south Wales) under full sunshine and the panel was producing 21.1V and 0.61amps. My simple calculatations (voltage x amps) suggest that this panel exceeds its 10W and was producing ~12.9W. Of course this is short circuit with a mutimeter and not under load, but it is rated as 0.61amps (short circuit) and I was getting this in April. Under somewhat cloudy weather it was producing ~0.4amps, quite good considering the clouds and that it is April in the UK. I have not yet fully tested it, as it draws a bit of current while the solar panel does not get sunshine, but at ~32mA standby current for 10h during a night it would draw 320mA, which is nothing.The charge controller works as expected, but remember to connect the battery first and then the solar panel. Pretty simple to setup up with a sealed lead acid car battery. The default of the charge controller is sealed lead acid battery, but if that needs changing, simply hold the on/off button for 5s and 3 settings can be selected, sealed, gel and flooded.Overall more than happy with this purchase of a 10W solar panel and charger controller kit for £26.One slightly negative thing is that the PV and Load led lights are a bit too bright, they could have toned them down a bit. Also, there is no way to change the load light coming on (or load being on) when the device is disconnected. For the price these are really minor things.Edit: After a bit of testing it is pretty good solar panel. Even in April (South Wales), 11am, behind a double-glazed window my power meter was showing 4.5W and 300mA (see photo of the 4.5W produced under load). It is unevitable that the double-glazed window will reduce the power output, so pretty happy with this purchase. In addition, the charge controller will go into a float mode of ~13.7V after the bulk charge of 14.4V. Thus, it will not over-charge your car battery. I also put the solar panel outside (end of April south Wales; 13h) and my wattage meter was showing 8W and 584mA generated under load (12V car battery). So, the specs are spot on.

Really pleased with this. Seems really good quality and works really well. My only minor complaint is that the crocodile clip leads are far too short. They are in a nicely insulated lead until they separate out a few inches from the end. They are not even long enough to reach the poles on a standard leisure battery which is surely what most people will be connecting it to. I had to cut back the insulation to make them longer which is a shame. They could also do with being larger as they don’t open wide enough to fit round the battery poles. Other than that it’s a great product.

10 watts at 12v = 833 mA, the most I got was 280 mA, equivalent to 3.4 watts but this was from a low winter sun in November at about latitude 53 Deg North, which seems fair enough to me. It will be interesting to see how it performs in summer.The charge light came on a 07:36 on cold damp morning, but taking measurements I found that in fact the battery was discharging at 3.7mA, with the PV panel switched off the discharge reduced to 2.4mA. This means 1) the charge LED only indicates that there is a voltage generated by the PV panel and does not necessarily mean the battery is actually charging, and 2) the battery will lose charge overnight or in overcast conditions if left connected to the controller.Connecting the panel to the battery via a Schottky diode on an overcast day generated about 10mA in the morning, increasing towards midday and then back down again in the evening. Much better on a sunny day as you'd expect.The implication is that if you leave the controller permanently connect to a battery during the winter, you could end up with a flat battery. To keep a battery in condition over winter I would go for a panel with crocodile clips and no controller.EDIT - from experiments it would appear that this unit does NOT have a blocking diode, bear this in mind if you want to connect it directly to a battery or in parallel with other panels.

Bought to trickle charge a battery running LED 'puck lights' in a summerhouse. Overall very pleased with it and especially the USB port on this model as an added bonus. Wasn't sure before buying about fixing brackets - suggested ones didn't look as though they'd work so I made my own - very easy using some 12mm aluminium strip if you're handy with DIY and have basic tools. Fixing to brackets is fidly but I used short nuts and bolts. All in about 30 minutes work. PV panel instructions a bit complicated and incomplete but DO read the controller instructions fully. Used a mains DP switch as an isolator as much cheaper than 12v equivalents. 12v fuse already available to connect to. Overall it took me about 3 hours overall to do allthe worong and power it up and immediately it started charging. Next day was sunny and even in November it topped up the battery fully.

Arrived quickly, easy to set up and use, works well with Electric fence unit.

Connected the panel to the box. Connected my phone to the USB socket on theb box, held the panel towards the sun and nothing happened. This is a rip off, do not buy.

Setup was easy, however tried it this year and it's dead, was stored in home safely all winter. Worked well for 1 season

Sturdy bit of kit. Produced power in low light conditions and does everything it says on the tin. Well constructed.