Renogy 40A 12/24V MPPT Solar Charge Controller Bluetooth Solar Charge Controller with LCD Screen for AGM, Gel and Lithium Batteries

Works as it should and kept a 110ah AGM battery toped up with a 200w panel in heavy cloud for a week, brilliant.

Bought a discounted on to begin with. Had to pay a solar engineer £80 call out to find out what was wrong with the system.. After checks he pinpointed the control box.. Returned to amazon.. No problem.. Ordered a New one which has been working as it should. Just annoyed we were sent on described "like new" which must have been returned because it was faulty. Cost me £80.to find out.

not the most efficient conversion rate.

Easy to install, but a few moans - * No back-lit screen, so you cant see whats going on at night.....in this day and age, theres no excuse for not having back lighting.... * the terminals clamp the wires IN FRONT of the terminal clamp, not behind (depending on your perspective).....anyone whose ever fitted a plug to anything, or wires into a plug socket on the wall will get this.... * The 4 status lights on the front of the panel, all look like they are illuminated, when the useual 2 are on.....at a glance, you think you've got an error code up, but its not....clearly, the 4 LED's are not shielded from each other inside the caseing, and get a bit of reflection off the ones that are lit...... * the button procedures (left and right, up and down) are quite complicated, and its easy to miss a step....YouTube is full of tutorials for the product, for this very reason...... To be honest a couple of guages to monitor battery strength, and "volts in", would do the job, at a fraction of the cost.....the advantage of this system, is that you can set it up to shut down the charging, and tell you what its doing by bluetooth or the internet, (extra module at extra cost) but i am sure, there are other ways around that, that are cheaper..... The "at a glance" screen gives you the basics, * is charging taking place, * is the system using power, * how much is left in the battery (symbol) but as above.....a couple of cheap gauges, would have told you that anyway...... I meant to give it 3 stars, but pressed 4 by mistake......

Easy to wire up and works like a dream

Stay well away from this rubbish, installtion started bad when I realised that the mounting plate was specifically designed to make it almost impossible to be mounted while the unit is in place as the unit prevents you from getting to the mounting holes when all they needed to do was make the back plate 10mm bigger, but this didnt prepare me for the completely useless terminals that use the softest metal on earth as your terminel screw that instantly round off the second you make contact with a screwdriver, and for some reason the terminal screws require masssive quantities of torque to turn despite never actually gripping any size wire you try to fit in them, I was hoping to fit in 6awg but tried both 6 and 8awg will not grip the wires just fall straight beck out again, you have 2 options, either strip the unit apart invalidating any warranty to replace the terminal points with something that can actually hold wires or remove the M5 terminel tightening screw and replace with a long steal M5 Screw and effectively use that to bolt on a M5 terminal ring and hope that M5 is thick enough for the current you plan on drawering through your system, complete and utter rip off and poor engineering this is not a charge controller its a kit of bits that you might be able to salvage and turn into a charge controller wish I bought epever now, really should have lisetened to the warnings from other reviewers about the poor quality terminels, I decided to open it up and replace the terminals or at least try to fix the badly made ones fitted, to my horror I could see the paper thin metal that connected the treminals top and bottom and see how easily it twisted when trying to turn the screw, this cannot be safe if running at 40 amps its simply not enough metal for that level of current to travel through but explained why these terminals are so flimsy and unusable please dont make my mistake and waste your money on this junk, if they cant even fit it with a set of terminals that work I can not imagine how bad the rest of the unit must be of such shoddy cheap workmanship and parts and they expect me to trust them with 40 amps running through this piece of rubbish without burning my shed down, not a chance buy a cheap 10 pound PWM at least they come with proper terminals that actually secure wires. The supplied manual is also incorrect, for instance page 20 refers to changing parameters such as charging charge voltages but infact if you follow the instructions the only parameters it allows you to change is battery type and if you select Li then you can select between 12v or 24 volt since the controller cant detect that itself and needs a helping hand when using Li batterries but you cannot change the charge voltages as the manual elludes or instructs, presumable your need to spend more money on the BT-1 app controller that another reviewer said doesnt work either to change battery charge state and voltages, this really is a dissapointing product and has put me right off buying anything with the name Renogy attached to it I write procedures for a living to build and use complex pieces of medical equipment it really isn't difficult to write and verify such instructions are correct and work so any company that produces manuals that simply don't work I always feel says a lot about their quality standards of which Renogy has firmly placed themselves on my list near the bottom rung buy epever or victron and save yourself a headache and have a proper charge controller you can wire something to safely and know you can control when needed without spending more money on devices to use apps that may or may not work, I had been enjoying my small off grid solar project right up until I made the mistake of paying Renogy for this headache

10/10

It arrived the next day as promised. After I installed it to replace the old regulator ( not a Renogy product ) that had failed, I was very impressed at how easy it all was. Since installing it a few days ago my power bank of 550 watts has charged much quicker and the available % power seems to be lasting longer, I can only assume that this has to do with the conditioning of the batteries now on the new regulator. I can safely recommend this to anyone running their own solar or wind set up.

Hooked up to our solar panel, now runs our lights & TV in caravan great!

Perfetto…. Ricarica le batterie molto più velocemente dell’altro in mio possesso di altra marca. Funziona perfettamente.

Functiona bien, precio regular

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.

Buena calidad y rendimiento.