SUNYIMA 30A MPPT Solar Charge Controller with LCD Display Dual USB Multiple Load Control Modes,New Mppt Technical Maximum Charging Current (30A)

A better quality than cheaper versions. The buttons are positive feel, making the programming easier. Keeping my sheep fencing working well, with no change of battery even in the dullest weather.

Replaced a really cheap unit, which had too high a charge voltage and destroyed the AGM battery. This works well, and I can adjust the resting voltage to battery-maker's recommended.

Works as it should at the moment still finding my way around the settings, but everything seems to be working ok, getting charge to Lifepo4 battery, in the winter Sun, but come summer it should be much better, following the instructions manual provided you will be up & running in no time 😁

SO i bought this to charge my LifePo4 battery in my van and little boat. At the time controllers, especially MMPT ones were a lot more expensive. However after nearly 2 years, I htink people need too understand a few things about my experience with this controller. FIrstly the controller is cheap. You can buy these on Alibaba for like £12 now and they are basically a cheap product when compared to Vitron and better makes it is clear. The biggest issue I have had is the lack of "Floating" and "Bulk" charging options. There is only 1 option for "Charging voltage". On any battery you need specific "bulk" charging, which is 14.6 ish on a LifePO4 battery and then the controller needs to know when the battery is full so it can switch to "flaot" charging, which should be about 13.4 to 13.6V. This is important for the longevity of the battery otherwise you will be overcharghing it. On a van or boat with constant solar feeds, this could actually be dangerous. SO i have playted and tweaked with the settings and this unit never switches up or down. After testing myself extensively now, I would also say that the "MMPT" is barely working. It is definitely not working like an MMPT system should. The voltages/amps are barely changing. I would lastly say that my camper battery was leaking charge quickly and it was found to be this controller that was the culprit. I have no idea why but I disconnected it and the battery held charge normally. I think you definitely get what you pay for in this case. NOw that the quality models are cheaper I think its not worth it and i'm going to get a better controller.

Very nice bit of kit So far so good We'll see how long it well lasts?

Easy to connect to solar panel and battery. Working perfectly. Hopefully will continue to do so.

I can get this unit to display the voltage of my batteries, but for some reason no matter what I do I can’t get them to charge via my solar panel! Instruction are in broken English and unclear too.

Got my van electrics professionally installed after I'd bought all the components. This solar charge controller was supposed to supply a 12v system. It's been sending over 22v to a lithium 12v battery and to the alpicool fridge which thankfully returns a fault code and doesn't blow up. Absolute rubbish, I wish I'd paid more attention to the honest reviews

Produit commander pour alimenter un ventilateur 12V à partir d'un panneau solaire de 12V-10W, et d'une batterie de 12V. Déçu par le fonctionnement qui est finalement très basique, j'ai de gros doutes sur la présence d'un algorithme MPPT, la tension mesurée sur les connecteurs de batterie, du panneau solaire et de la charge étant quasiment identiques. De plus les valeurs de courants affichés est totalement fantaisiste : 0 A entrant rentrant dans la batterie, et 0,7 A consommée par la charge (en réalité, le courant entrant était de 0,5 A et le courant consommé par le ventilateur était 160 mA). Et finalement, après environ 3 mois d'utilisation, plus d'affichage, donc plus de ventilateur... A éviter...

Excellent solar charge controller. Don't listen at all at negative reviews, I've tested it in conditions where more expensive brand names would stop charging and with my 2x80W solar panels in my test setup it was able to get charge into the battery on a severe cloudy and rainy day well until 21:32 in May. Only thing is the box said it could be monitored via App but that is only for Chinese Domestic Market. The App is safe and doesn't collect any data on iOS. Overall, I liked this solar charge controller for the excellent MPPT algorithms, great price for 30A, and the presence of a physical display, control buttons and USB ports. Worked perfectly on my test setup so now going to upgrade with more solar panels and bigger LiFePO4 battery.

01/10/2021 - I purchased this and a RICH SOLAR 30 Watt 12 Volt Monocrystalline Photovoltaic Solar Panel (https://www.amazon.com/gp/product/B07FN84C9K/) to keep a 12 Volt, 7 Amp-Hour battery charged and to supply power from one of its two USB ports to operate a Wyze V3 camera mounted on a tree outside by a bird feeder; thus making a homebrew solar-powered bird-watching system. My initial system requirements calculations include the following known parameters: The Wyze V3 camera consumes 1.575 Watts of power with night vision IR LED turned off and camera power LED off. MPPT Solar Charge Controller draws 15 mA of current on standby connected to the 12V battery with no external loads. Total power consumed by the camera and controller is 1.755 Watts. Based on these measurements, just over 42 Watt-hours of power would be consumed from the battery every 24 hours. Assuming a new battery is in use, a total of 84 Watt-hours of power would be available so the best-case operation time of the camera with no recharging from the solar panel would be two days. To keep the battery charged would probably require an average of 50 Watt-hours per day from the solar panel due to losses in the battery chemistry when charging and losses in the 50 foot 12 AWG wire (https://www.amazon.com/gp/product/B077Z28343/) from the solar panel and losses in the SUNYIMA 30A MPPT Solar Charge Controller. That would imply the necessity of at least 1.66 hours of sunlight per day on the average. Because my solar panel location can only see the sun for probably 2 hours per day of direct sunlight and maybe another 2 hours per day of partial sunlight due to tree shading I’m hoping the battery will maintain its charge. I did notice the SUNYIMA 30A MPPT Solar Charge Controller voltage display was about two-tenths of a volt higher than what my expensive Fluke meter was measuring at the battery but that’s better than 2% accuracy. I’ll update this review after my system has had some time to operate over varying conditions of solar power output and time in the environment. UPDATE after two days of operation: We've had two days of solid rain and no direct sunlight and the battery voltage has dropped to 11.5V which is still sufficient to operate the Wyze V3 camera since it was installed two days ago. Hopefully the sun will shine again tomorrow and get the battery voltage back up to above 13V. The good thing is even when it is raining and no sunshine there is enough light getting thru the overcast rainy skies to raise the battery voltage about 0.2V during the day and power the camera too. UPDATE on third day of operation: Well, two days of solid rain with no sunshine allowed the battery voltage to drop below the default 10.8V cutoff value programmed into the SUNYIMA 30A MPPT Solar Charge Controller and the camera stopped receiving power. Today the sun came up with no cloud cover and around 11:34 AM the voltage on the battery reached the factory default programmed value of 12.6V and restored power to the USB port for the camera. The panel was shaded in the early morning by trees in the east so that's why it took so long for the voltage to rise from the 10.8V cutoff value to the 12.6V power restore value. I've added a screen capture of an Excel spreadsheet that I'm using to record voltage values displayed on the charge controller and weather conditions. So far the charge controller is doing what it is advertised to do! Update 01/16/2021 - Updated Excel spreadsheet image

Funktioniert tadellos! Kann ich nur empfehlen!

Works great. I have my converter and solar/car going into the MPPT and it keeps my battery topped off. This is installed in an overlanding trailer with one battery keeping my ice cream frozen.