I've been using Renogy products for 3 years now. I boondock all winter in the Arizona desert powering an old RV with 4 100w Renogy panels. For two and half years I had been running my solar through a Rove 20a controller.

The conditions were such that I was constantly exceeding the limits of the Rover 20a unit, often feeding it over 25a and it never complained.

I finally smartened up and upgraded to the Rover 40a and it is doing its job perfectly. My only issue is with the bluetooth module. It was constantly needing to be unplugged and plugged

back in to be reset. This appears to be a generic bluetooth issue that is not limited to Renogy controllers.

My simple fix to keep from having to go outside to do the unplugging was to take an Ethernet cable that I had hanging around, plugged it into the controller and ran the cable into the RV. I bought a cheap connector to join it to the bluetooth module cable and now I can comfortably reset it as needed without going outside and crawling on the ground to reach the charge controller.

The Rover controllers are quite rugged. I run fans in the bay where my controller, inverter and batteries are located, yet the temperature will often get to 125 degrees. That's in the desert in the winter!

So far, so good.

Great replacement for the PWM controller that came with our Renogy Solar kit. Initially we had the Renogy PWM 30 AMP controller and it was an entry level controller in all respects. The previous controller was limited to a 12 volt battery source had 2 lead pairs, one for solar panel connection and the other for the battery side connection. Any load connected to the battery array had to be connected directly to the batteries and was not governed by the controller. Also you had to rely on LED indicator lights To determine when the controller was in charge mode versus float mode. Adequate for an entry level controller but not great. Now lets talk about this controller.

First, this controller is capable of 12 or 24 volt wiring installations. 24 volt DC is superior to 12 volt DC because it cuts the Amperage draw in half on the DC end. A 1.2 Amp TV running on AC/120 volts will require 12 Amps on the 12v-DC end to meet the same 140 Watt requirement. A 24 volt DC setup will reduce the amperage requirement down to 6 amps on DC, which means your DC wiring gauge doesn’t have to be as robust when supporting a 24 volt application.

Secondly, the LCD display is great and is a must for a solar charge controller. It’s not enough to know that the solar cells are charging the battery, you may also want to know how “fast” they are charging the battery and whether or not the panels should be angled to reach optimized charge rate. The LCD screen also provides a percentage estimate of battery remaining in addition to the amps that are being supplied by the panels, along with a running amp-hour accumulation of charge provided the panels over a period of time and current battery voltage.

Third, it has a pair of positive/negative load leads that permit connecting appliance loads up to 20 Amps DC. It’s not necessary to use the load leads for connecting the devices that run off the battery, but the added advantage of using them is that your battery array is protected from over-consumption, as the leads shut off usage on the battery once it reaches a certain level of discharge in order to protect the battery array.

I’ve only used the new controller once, but the instructions were easy to follow and I made a laminated copy of the LED and Menu options as a quick reference guide that will go along with the kit on camping trips. Currently the array powers my 400 Watt (4x100W) kit and 2 VMAX 125ah batteries wired in parallel, but I am seriously thinking of doubling the panel array and adding 2 more batteries in a series/parallel configuration to take advantage of the 24 volt capabilities of this controller.

Quick Note on the 100 Watt Renogy panels:

When I measured the charge current of the 4 x 100 watt panels connected in Parallel I noted an 18.5 amp charge rate on the new controller or ~4.6 amps per panel. That seemed low to me given that 400 watts/12v is around 33.3 amps, or 8.33 amps per panel. In discussions with Renogy support I found out that the 100 Watts is calculated at 17.9 volts * 5.7 amps, where they use the maximum charge voltage by each of the panels as basis for the calculation. Just something to be aware of when you are reading sub-5 amps per panel charge rate on your controller.

This new controller works as advertised, was relatively inexpensive for what it does, and I may update the review again in 12 months after running it a few more times for a consistency check.

The price you pay seemed high until you set it up and it just works. It took a few minutes to get the setup right but once it's done it does the job very well.

Using with Renogy solar panels, this works very well. Just make sure to mount vertically, or it will give over-heating errors. The Heat sink in the back needs to be able to dissipate the heat. With a proper installation, it's reliable, quiet and easy to use.

Meets all specifications, MPPT tracking and voltage down conversion from PV module voltage to battery voltage conversion works well. Efficient, at least 90% of PV module power goes to the battery (note: cheaper "PWM" chargers burn off excess module voltage, wasting this power, instead of converting it). Pre-programmed Lithium battery charge settings work fine. Screw terminals are easy to use and make secure connections.

I mounted this unit to the outside of a Group 24 battery box, which I use with a 100W module and a 100Ah LiTime battery for power in remote locations; the combination works very well. Big, easy to read display. Menus and buttons are intuitive and easy to learn and use. Well made. Easy to mount. Includes temperature sensor probe for battery temperature compensation. Good value, I would recommend it and would buy it again.

I use this a couple times a year for the last 3 years with no complaints. Works great with a pair of 48V panels to charge a 200ah SLA AGM deep cycle battery without any issues. I previously had a smaller controller that the 48v panels fried, but this handles it great and the LED screen is nice too.

Initially, I bought a Rover 30 for my solar panels back in 2022. It failed after 6 months. Renogy would not honor the warranty because they said the charge controller for my wind generator voided it, even though there was nothing in the warranty language that prohibited it.

After 1.5 years with an unbranded hybrid MPPT that could take wind, I decided to take the wind offline, add two more panels. The Rover 40 seemed to make sense in that application. I hoped that this time the Renogy, which does well in converting high voltage low amp current from the panels to 24V/high amp charging current, would serve its purpose well.

For the first couple weeks, it did very well. But now about once a day, I have to take off, reposition, and re-connect the battery cables. It work fine for a while, and then stop charging. Then I am running straight off the batteries until they run down. Seems the battery cables will not stay connected despite my best efforts.

I've noticed in different reviews, others have also had issues with their terminals. One person complained that the screw stripped out, which suggests to me they were trying the get a good, lasting connection. I don't think this problem is unique to me.

Since I am still within 30 days and since I had poor experience with their customer service previously, I'm not taking any chances. I've orderd a Vectron to replace this, and as soon as it arrives this thing is going back into the box and back to Amazon.

No more Renogy products for me. I'm done with them.

So unbelievably user friendly! Easy installation and works perfectly. I am a solar novice and this was super easy.

Gran producto, lo recomiendo!

Awesome product! Works great, well made..happy camper!

This is the second unit I’ve bought.

They are a great unit. And easy to run in parallel.

They were handling 2500w easily. (With room for expansion)

Robusto ben fatto, completo di tutte le funzioni indispensabili per un mppt stand alone. Il dissipatore di calore è ben dimensionato e non necessita di ventole visti i rendimenti dichiarati dalla casa che credo siano corretti anche sulla base dei test che ho fatto. Inoltre il modello 20A gestisce potenze tutto sommato modeste ( 480w con batterie da 24v). Il display è a cristalli liquidi senza retroilluminazione con tutti i problemi dei cristalli liquidi. Di giorno e con vista frontale sono nitidi e chiari, con vista disallineato non si riescono a leggere. Non è che uno sta sempre lì a guardare il display, una volta impostato si controlla ogni tanto. Con l'app questi problemi non ci dovrebbero essere, però occorre comprare un ammennicolo wifi da aggiungere. La morsettiere fa il suo lavoro ma forse si poteva fare meglio. La programmazione è un po' macchinosa visto che si deve entrare nei vari menù, scorrerli fino al parametro di interesse, modificarlo e salvarlo. Vero che si fa una volta sola, ma è un po' noioso. Sul display di possono vedere tensioni e correnti gestire dall'apparecchio ma mancano statistiche più accurate, credo che sempre con app e ammennicolo il problema si risolva Cosi come la programmazione. Per me l'apparecchio va bene visto anche il costo di acquisto scontato ed è certamente completo per l'uso stand alone. Al prezzo di vendita pieno , senza sconti, si trovano apparecchi più completi con wifi app incluse.

I recently installed the Renogy Controller on my sailboat, and it has been performing flawlessly! The MPPT technology is highly efficient, maximizing the energy output from my solar panels, even in low-light conditions.

The LCD display is clear and easy to navigate, providing all the information I need at a glance, including real-time system stats and charging status. I also appreciate the sturdy build quality and the numerous safety features, such as overcharging and short-circuit protection, which give me peace of mind.

Overall, this charge controller is a fantastic choice for anyone looking to optimize their solar system. It’s reliable, easy to set up, and handles the load perfectly. Highly recommend it!