It is grossly overpriced and difficult to find. It is nothing more than a solar charge controller that should sell for around $50.00 tops. It gets hot, very hot. I put a battery operated fan blowing on it to try to keep the heat under control. Heat is the kiss of death for all electronics. The specs for it are difficult to understand since they do not jive with common solar panel specs. A call to EGO was useless. I waited over 30 minutes to speak to a nice lady in a foreign country that knew absolutely nothing about this item. I knew more than she did. There are apparently three parameters you must abide by; 180 watts max input, 10 amps max input, 12-22 volts max input. EGO recommends a 100 watt panel that on a really good day you might get 75-80 watts, maybe. Any type of light clouds and you're going down to half that. I've run the test here in Arizona where the sun is powerful to say the least. This is common with all 100 watt panels, you will never get the max, never. Run the numbers and see just how useless this solar system really is. A 10 amp battery has 560 watts. Deplete it to 10% and it needs 504 watts to get back to 100%. At 75 watts and hour it takes nearly 6.75 hours to charge. If you use a 200 watt panel you have to babysit it with a DC amp clamp meter to make sure you do not exceed the 10 amp limit. Even then 150-160 amps is about the best you can expect in the real world. At 160 amps it still takes over 3 hours to charge under near perfect conditions. I knew all this going in and was not impressed but there is really no other choice for the average guy. Just be aware of the limitations before you buy an expect zero customer support in regards to this charge controller. I really do like EGO products but their customer support has gone from very good when they first came out to near absolutely useless now. You had better be able to figure things out on your own.