Installed this on my wife's horse trailer after she complained about not having battery power for her hydraulic jack or other options when not used regularly. Obtained a post mount bracket from another supplier and mounted on 16' wood long post sunk 4 feet into the ground. I put the controller inside a metal box for protection from the elements when driving 70 mph. It's been working perfectly since Jan 2011 and my wife is happy again. I have two, 12 V size 24 dual purpose batteries connected in parallel. I recently added a 800 watt inverter so my wife could have AC power for her motorized hay lift.

I have never seen it go into desulphation mode yet (flashing LED) but maybe that means nothing.

As I continue with my upgrades I will most likely relocate this unit to tend my car and motorcycle batteries. Although it is said that costs are coming down, solar remains very expensive in terms of return on investment. I am very pleased with the product and would recommend it to anyone wanting to build a small solar backup system. As of right now if the power goes out I will be able to make coffee, run a CPF 60W equivilent bulb and listen to the radio or a small stereo through my 750W inverter for as long as I need to. Good supplimental power. It works as advertised so far. It's a start for me, for others it may be all that is needed.

The unit came well packaged and I found it to be well constructed with easy to follow instructions. I purchased as an upgrade to a 5W panel I had tending a deep cycle marine battery connected to a 750W inverter in a 1 car garage / shed I am in the process of converting from nothing to 100% solar. It has gone into maintenance / desulfation mode a few times but I have not had a chance to document actual performance during desulfation. With the included charge controller / tender it is a definite improvement over what I had and a good stepping stone to my eventual goal.

The instructions recommend placing risers under the panel to raise it up to allow air flow for cooling. I used 1/2" PVC pipe cut at 1" lengths inside thin stainless steel tubing for appearance but though that the spacers should have been provided for the price. The battery monitor could use a means to screw mount it in case you don't have a good area to stick the velcro pad. Using a calibrated and certified Fluke meter The output of the panel in full sunlight is 18V @ 750MA which is a tad shy of the advertised 15W if my math is correct.

Seems to be well built.

Does not put out 15 watt, even in direct sunlight. It is more like a 10 watt unit. I could only get .79 amps to a battery that was low. I will need more than this to maintain my battery.

i brought this solar charger for my Brother to put on his boat ,so far ,money well spends,it works beautifully and he is looking at getting another ,so thank you and keep up the good work

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These products work. I have recovered several batteries with them...but you need to understand their limitations. older batteries will leak internally. If that leakage current exceeds the power of the BatteryMinder you will wait a long time for your product to go into "float" mode as it will be using all it's energy trying to recover the battery...can take a couple weeks. I have a 7 year old car battery that took 3 weeks to "float" the first time, now, almost a year later it will reach float in a couple hours.

I have several different BatteryMinder products and am quite pleased with their performance. Caveat: The battery should be fully charged BEFORE you begin to use the product if at all possible.

For those that don't feel it has gone into desulfation mode because it has not reached "float" stage,,,it is always in desulfation mode. The flashing LED only means that it has reached full charge and is in "float" mode. (slightly lower charge voltage so the battery will not lose excess water.

as an engineer, I would like more information in the owners booklet.

Wish all products and services were this reliable

Quick delivery

Well made

Fantastic support people

Works great

Recommend to all

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Arrived promptly without damage. All components and parts labelled and securely packed. Easy to install for someone with modest skill. Due to security reasons at my storage location I cannot leave the Battery Minder connected continuously. I am able to quickly connect the unit (2 minutes) during visits while I work on other projects. Even in overcast days the lights show the solar is connected and charging, though I have not measured the watts. I also installed a battery disconnect switch to prevent any phantom drain to my Airstream when it is not in use. Battery shows "Good" but have yet to reach "Maintenance Charge" (flashing light). Voltage of my 2 wet cell size 24 batteries tested at full charge prior to installation.

You need a very small screw driver to make the connections. Not a con so much as a notice to have one available.

I am using this on my boat that is kept in an outside dry storage to maintain my batteries. So far it is working great. The batteries are new but still the comfort of knowing that when I have the boat put in the water the engines will have the charge to fire them up right away is what I wanted