MOES Dual Power Controller 50A 5500 Watt Automatic Transfer Switch for Off Grid Solar Wind System ATS DC 12V 24V 48V AC 110V 220V.

From what I can garner, the unit draws 7-8 watts of idle power consumption. The transfer switch worked seamlessly upon initial testing. When I forgot to turn the PV input back on, the unit had already switched to shore power by morning. Since my batteries were run nearly all the way down, with little sun the last few days the Moes unit has worked flawlessly switching back and forth from grid power to battery. Very good and easy setup after tons of research into a solar battery transfer switch. Easy to use, settings are a breeze and it just works!

I enjoy experimenting with solar power and I've never had a permanent solar system. The main problem with using solar power as a hobby is that when your battery runs low, your inverter and all the devices connected to your inverter will turn off too. This makes it really difficult to reliably use the power you generate, at least till I learned about this little gem. With this ATS you can connect your grid power, and inverter as an input, a plug (or what ever you decide to use) as an ouput, connect a voltage monitoring cable to your battery (from the ATS), and this device will automatically switch between your inverter and grid power depending on your batteries state of charge without ANY interruption do your devices. If you are watching TV, or gaming on your computer during the switch you will not even notice it. The best part is you get to determine the low voltage at which it changes to grid, and the high voltage when it changes back to your inverter. This means that you can run your devices off your solar panel/battery and then when that power is used up it will swap back to grid power. The next day when the sun comes up and the battery charges, you are back to solar power. This is great way to make permanent use of smaller solar systems. The other exciting thing is that you could (if your batteries can support it) add more and more panels to the system and get usable solar power when the sun is up without having to spend a ton of money on batteries.There is feature i wish this device had, mainly the ability to manually choose if you want to use grid or solar power, but it's not a deal breaker.This device can show an incorrect voltage reading (might be off by .2 volts, but if you hold the up and down arrows for 3 seconds you will be able to adjust the offset.I have used this system for over a week now and it's working flawlessly, i wish i had known about it a long time ago!

Hi, using this device with my solar power system. Great device for automatically switching from my inverter to utility power. Installation was easy and it worked as it was advertised right away. Because it does work as advertised, I am giving it 5 stars, but I hope for a 2.0 version.There are times though, when when there is going to be more lack of sun days then your system is designed for. I wish they could provide a way of pressing one of the buttons to force it to the opposite source (solar is forced to utility, utility is forced to solar) with disregards to the settings.....a manual override. Then you could press the button to force it back to automatic mode. I sometimes want to keep a little juice in the batteries if I know we will have several stormy days in a row, in case I do need it.Last, as previously pointed out, if your inverter shuts down for some reason, maybe a failure or blown fuse in the inverter, this device will not automatically switch over to utility power. As pointed out, you can manually add a relay, powered by the inverter AC output, to disconnect the battery from the battery input on this device. Having it built in, with an option in the settings, would make it bullet proof.

Happy forIts been little over two years since I bought it, I dint find anything quite like it. Super easy to install, granted you have a basic understanding of electricity. Extreamly reliable and worry free. Just install and watch the magic of automatic power transfer. Bearly notice the changes. Would have give it a 5 star but I wished it would at leats last 5 years. Any way, im not dissapointed. Great product. I bought at $133.00 Its now $79.00 . I'm defenetly buying another on after I write this review. Still seems to be the best product out there. Other with similar capabilities are a bit more expensive. By the way, what happened to mine is that the output power port died/fried.