ALLPOWERS20A Solar Charger Controller Solar Panel Battery Intelligent Regulator with USB Port Display 12V/24V

PROS:* Inexpensive* Two USB ports* Display screen* 12v and 24v* Supports multiple battery types* Very customizable* D2D Dusk to dawn (unexpected feature I really like)CONS:* PWM Pulse Width Modulation rather then MPPT* Connectors are a little small (It will fit 10 Gauge wire but just barelyThis is a PWM controller but for the money you save buying this controller rather then an expensive MPPT controller you could buy an extra 100 watt solar panel. For instance a Renology 20 amp MPPT controller is around $100 more. My last 100 watt panel cost me $108 delivered. The more expensive MPPT controller might be a better choice if space is extremely limited and you need to squeeze out every watt. For the rest of us this is a pretty good choice.The display: It's not the worlds greatest screen and I wish it had a back light but I have terrible vision and I can still see it just fine. If you mount it somewhere dark bring a flashlight. The default screen shows battery voltage, battery level, and whether the battery is charging. Buttons scroll through other information like charging amps, load amps, temperature of controller, and optional settings.The USB ports: These are convenient. I have charged my phone with these ports quite a few times. They are rated to deliver 3 amps combined. You won't be fast charging with these ports but they work fine.12v / 24v: I won't go crazy explaining this but 24v can be better with long cable runs. I use 12v with short runs for convenience. This controller will do either. If you need 48v they make a controller that does that too.Supports multiple battery types: I use lead acid but you can also use Lithium Ion, and LIFePO4(Lithium Iron) For portable use Lithium Ion and LIFePO4 can save weight!Customizable: I won't go into every setting here but you can change things like cutoff voltage, charging voltage, low voltage reconnect, and turn short circuit protection on and off.D2D Dusk till dawn: I wasn't expecting this feature. This allows the controller to automatically turn on things like lights as soon as the sun goes down. If you want to set up outside lights this feature works great. I have been using this feature for solar night lights that actually work. This would be great for lighting a cabin, remote shed, or a long driveway.I was going to subtract a star because the manual didn't contain details on some advanced features but when I contacted the company they quickly responded with an updated copy of the manual. The updated version explained some features I previously didn't understand.

This is the second one of these that I have owned. The first I have had for over two years and still works fine. This new one will be used on an additional solar system. The controller is simple but works well. The instructions are adequate.

After reading reviews I agree that support is none existentI need this to have the load on during day time and of at night and as many of you the instructions were written in Chinglish and make little senseAsking for support is futileSine most of you said this works well in 24 H modeSo to resolve my problem I will get 12VDC photocell switch to control my load with a relayWill let you know how it workes

Before I purchased this I was hesitant due to the numerous bad reviews. It sounded like it would be a huge headache and filled with problems so I took my time and investigated everything. I have determined why those reviewers thought this was a bad buy and I want to help YOU understand what they did wrong and why these issues won’t be issues for you.The first issue I want to address are the wire connectors. Many reviewers say that the wires come right out and can’t stay in. Let me tell you the problem, if you look at the photo I took of the connectors you’ll see that there is a little metal square that moves up and down when you turn the screws, you want the wire inside that square and when you tighten the screws it moves that square up and tightens the wire. Many reviewers are simply sticking the wire in under the square and trying to tighten it down on the wire.Next numerous reviewers complain that 10gauge wire doesn’t fit well... if you read the specifications you’ll notice it is only rated for at largest 12 gauge, so obviously it won’t fit well... also you shouldn’t need 10 gauge wire if you are staying within the rated amperage.Speaking of rated amperage, this device is only rated to constantly manage 80% of its maximum amperage which is 16amps.Another reviewer mentioned that he had it set to float charge at 13.7v and that it was charging at 14.2v... he said he called support and there was a language barrier... well I actually think there was a comprehension barrier since the instructions state when charging LifePO4 batteries once the battery is full the device switches to float mode and it will charge at 14.2v for 2 hours and then continue at 13.7. These are default settings.The next are all the reviews complaining of the unit getting hot and overheating... sometimes this could be a legitimate failure, but more than likely the majority are due to mounting them incorrectly. If you refer to the photos you can see that the device is made to distribute heat out from the metal plate on the back of the unit. It specifies that there needs to be space above and below for airflow. I would go as far as to say that if you mount this inside a box you could have trouble and you also should not mount this in the sun. Mount this in a place the heat can escape from the rear of the unit.Make sure you read the directions and follow them. The unit is a cheap option but not a bad option. It is not weatherproof by the way... crazy how many people ask this... it shouldn’t even be used in high humidity.If you want something cheap and easy shoot for this. If you want bells and whistles go spend $200 on an MPPT.

The media could not be loaded. This product works fine to charge a battery with a solar panel. However when attaching a load it does not fare so well. A small 300 watt inverter did work for a few hours until the inverter malfunctioned. When upgrading to a larger 600 watt inverter the controller did not have enough power to even turn it on. I have to connect my inverter straight to my battery for it to be powered. Also it seems to be malfunctioning as when the battery and solar panel are connected to the buttons do not function properly. I press the menu button and the screen flashes and returns to the main page. I wish I would have spent more on a quality controller. Although they do give me a bunch of problems and do not work as advertised, I will keep them because they do a fine job at charging my battery bank. Also when trying to look at reviews for this product, the review page is littered with reviews for a completely separate product.Update. This item is actually useless. Stopped working less than 2 months after purchase. Do not buy this unit!

usato anche come mantenitore/caricabatterie funziona molto bene, da impostare per il tipo di batteria che deve alimentare

Product was good,good quality,but I am not ready, I will make a reorder some time later.

After way too many hours of reviews and research and trying see if I could get a MPPT solar charge controller and then realizing that any MPPT unit under $100 was a China fraud advertising as a MPPT. So I made a gamble with the Allspower unit. Bottom line this thing works above and beyond my expectations and to hell with all the chasing of a few extra watts. I have a 100 watt panel on a garden shed for for some interior and exterior lighting. At noon with the sun it directly I am pulling out as much as 7.5 amp @ 14.5 volts. Once the battery is charged it easily maintains the float voltage of 13.7. The only issue I had is it does not like to have a invertor hooked up too the output. But that is a minor issue. Follow the instruction and it works, my batteries were at about 30% capacity and with in 2 days they were were fully charged. Bottom line for most systems this unit will do the job hands down with no issues.

Très facile

lo tengo puesto con una placa fotovoltaica pequeña para mantener la carga de la batería de la vivienda en mi autocaravana cuando la tengo guardada en el garaje y va de lujo. después de casi dos meses la tensión de las baterías sigue en 13,3 V