100A MPPT Solar Charge Controller 12V 24V 36V 48V LCD Display Battery Intelligent Regulator Max 100V Input Dual USB for Lead-Acid/Lithium (100A)

Work good easy to install

After three months of installation, they operate with no problems, even in the shade of Arizona's heat. I ordered them because they have the larger screw in ports for the 10 or 12 gauge wire, solid body, good heat escape fins on the back, and an easy-to-use button. And most of all, I run 3-- 20-amp 12-volt system, so I buy equipment that will handle at least twice the load I put on it, instead of like my neighbor, who underbuys and burns his crap out. Everything is excellent about them.

Terrible circuit design. The controller is powered from the battery side, not the solar panel side. This means that if your batteries go dean overnight, when the sun comes up IT DOES NOT WORK. It's a complete pain to use. You have to use a separate battery charger to get it started, completely defeating the purpose of solar power. Do not use anywhere that you can't charge the batteries from the grid or another generator.

Got 100A model, 4 stars only because the clock is a joke it will not be accurate for more than a day. The device has capacity for wire 6 awg for sure, I will be using 40+ A soon right now 30A 24V working good, wire 8 awg. The display has a changing display and having V, A, W and Temperature is great, without having to press buttons as others is very good design. I got this one after trying to work with other brands that claim 100A, none of them worked at 30A ,they only fit 10 awg, for 100A that is far from true. They all overheated at 30A, and the LiFePO4 where impossible to set, they all tried to trickle charge or something, that did not worked, all the manuals you know are not very easy to use. But I have to say if you want one that works at more than 25A this is it. The MPPT is somewhat an approximation and the efficiency is not that good, I will continue to do testing to improve efficiency as I have 8 LiFePO4 12.8V 100AH batteries (really 13.3V when full), set in series (2) parallel (4)

For the price. You cannot go wrong. I had rated this item lower. But after realizing this charger is compatible with 12 to 48 volt batteries, I had to change my rating. The more expensive controllers aren't as compatible. DIY perfect. Specially on a budget. It works for the ranges listed. I went from 12v to 48v system with this controller. No issues. Found out the hard way when I tried to do the same with a more expensive controller and they just don't have the compatibility. That controller is a paper weight now. This controller saved my day.

The size was bigger than expected from photos but it was a happy thing to find full sized screws and large holes to put in pretty big sized wires. Not sure of size. Screen is a little small but tells the tale. Easy information update with no confusion. My amateur wannabe engineer says put washers or just strips of metal where mounting holes are so no breakage in hard conditions. The case seems brittle plastic instead of forgiving but for price, especially if wattage and electronics are good inside, is a real treat. Happy to have bought it. Others reviewed it okay. One one is better.

It is definitely a $40 charge controller. Not true MPPT no way to even know if it is MPPT, most likely PWM. It is so simple my high technical and experienced mind is baffled. No option to change charging to lithium standards. Today was the first day to see it in action. This is very cheaply designed: push buttons are simple detent type buttons. Push Menu Button use left up button to cycle between modes: Charging, Lighting, Lighting with delay, Universal control, Timing, and Test. I took pics knowing I'll lose manuals but one pic was blurry. Not sure what the Universal and Test modes do? The right button is on off for load but when in menu not sure what it does. I'll try to program it for lithium tomorrow but i have high doubts it even has the option for lithium batteries. I am hoping and assuming it has auto selection on battery type but it is too cheap feeling to have that option. Even the most expensive models dont have auto sense for lithium settings. One thing I was really disappointed is depending on battery voltage limits your input voltage. I haven't tried to put more voltage to see if it can handle. I have a 24vdc lithium bank 300ah. According to manual it says input voltage for 24vdc is between 30vdc to 50vdc. For 48vdc input voltage can be up to 100vdc. I had to parallel two 410w panels 31vdc 13a each. It doesnt make sense that it can handle 2400w at 24vdc meaning it can handle 100a but output is only 50amps. The terminals can barely accept 8awg wires which can hanlde maybe 60amps. Not sure how to put 100a on solar input using an 8awg terminal. I understand rule of thumb most controllers are more efficient if the voltage from PV should be slightly higher the battery bank voltage. Example: 24vdc bank (in my case 29.6vdc bank) PV In Voltage should be between 30vdc and 50vdc. If you match 50vdc at 2400w the amps would be 48amps max! My case I have 31vdc panels 13amps: When I parallel two I have 26amps on a 10awg wire. Im at max! But with 31vdc at 2400w the amps would be 77amps! If in series my panels produce 62vdc over the rwting for 24vdc bank. Due to this being a chinese product. I am going to derate all of that. My plan was to put 1640w (4 panels) into one Controller but now that I know its parameters, I will only use 2 due to the 10awg wire ampacity. I have two controllers, I have 8 panels but will only use 4 of them till I can find a better controller. You definitely get what you paid for. If you just want a simple charger that is cheap and its install and forget, this is it. If you want a charge controller that tells you everything... this is not it.

Arrived on time works great easy to install good display