SmartSolar MPPT Solar Charge Controller 75V, 15A, 12/24V | Bluetooth Charge Controllers for Solar Panels

Solar energy is a great way to have back-up power for your home or for your RV. Solar isn't super complicated, but there are a lot of things you need to know to make the best purchases. Solar charges (like the Victron) come in both PWM and MPPT. PWM are significantly less expensive, but may fit your needs. MPPT is a better option, and this very affordable Victron unit is a fantastic entry-level charge controller. It's 75/15 name refers to the maximum volts it will accept/use from your solar array, and the 15 amps it can accept/use. The Victron Smart Solar 75/15 can handle up to 300 watts of solar panels wired in series or parallel. In series, that's about 68 volts max, well within tolerances, or 16.5 amps max which will be capped at 15 amps. Truth is, except for perfect sun and panel angle, you're not likely to hit the 16.5 amps. Still, that's not bad! A great part of the Victron 75/15 design is that it has bluetooth built in, so don't need to shell out extra for a dongle. Note: if you want this, look for the "Smart Solar," if it doesn't say this, you'll need a dongle. The size of this unit is just excellent; I bought it for my DIY powerstation. It works great, giving me nearly the full 100 watts from my Renogy solar panels under ideal conditions. For the money (about $65 at the time of purchase) it's simple enough for the beginners, or strong enough to manage a modest RV. Cons: It uses small, flat-head screws, so you'll need a small "pocket" screwdriver to make the connections. The input for the wires is pretty small. I had a ferrule kit, so I was able to insert 12 AWG with no trouble. I don't know how you'd easily get 10 AWG (somewhat standard for solar) but what I had worked and I'm happy.

I use this charge controller between a solar panel and a battery. The panel is a single 120-Watt 12/24-Volt unit with a maximum (open circuit) voltage of 33.7 V. The battery is a pair of 12-Volt lead-acid batteries wired in series to make 24V. It appears to be working well. It charges and maintains the batteries at about 25.8 Volts. The controller is easy to wire and set up. The iPhone app took some fiddling around to get going - a couple extra minutes that may have been my fault. Once up and running the app connects the phone to the controller via Bluetooth over a modest distance, maybe 10 yards. The app shows charge current, panel voltage, charge power, and battery voltage. The controller is compact and appears to be solidly made. I would buy another if I have the need.

I have to say some kind words so far for this charge controller, in short, this is an amazing product. Early in its use, I have a small outdoor solar array using batteries to power a sprinkler system, sound system, lighting and an outlet using a separate inverter. We live on top of a hill, no trees, no wind blocks and get the worst of the weather constantly. I have been through many MANY MPPT Solar Charge Controllers and was a bit scared to go with a Bluetooth only controlled device. I was quickly impressed with the VictronConnect software, giving a demo device so I could test drive the settings and see exactly what I would get and control. Next up, how hard is it to connect and reconnect once I got physical hardware.... It was literally as easy as the demo equipment. I was able to power on the controller using Solar power OR battery, meaning as long as you have 1 power source it just works. Bluetooth connected instantly, one tap on my Android phone and the PIN on side of the controller and I was done. I did notice that the default for me was 24v when I had a 12v battery connected but that wasn't a big deal, went through set to 12 and was all set. Because I do a lot of work with solar controllers, I wanted to see how accurate and fast this little beast was on the phone app, ran a constant 25w load and the app was within a half second reporting accurately. Variable loads also gave good information, up to this point I was already sold that this was a solid device. The app is just about perfect, gives you Amp and Watt usage which is nice for quick math and efficiency conversion. I also really like that the battery stats show when your load is pulling from solar only or from battery, very clever and easy to read. Pros: Super easy to install, Plug and Play Easy to configure easy AND expert settings Complete customization of battery settings and a good number of presets Was able to configure exact settings for my 12.8v LiFePO4 battery! Feels solid and I have no doubt that it will last in harsh environments Easy to mount, Good size fits just about anywhere Easily control load on/off depending on solar input Cons: Cant find any yet but here are some things to note Mine defaulted to 24v, easy change to 12, maybe sensitive batteries and large systems might have connection issues Would be nice to have a day timer for on/off functions as well as solar input but this is being super picky If you are looking for a good MPPT Solar Charge Controller, feature rich and don't mind using your phone and Bluetooth to configure, this is the one you want. Can't comment on longevity thus far but I have no doubts this will last! Will update if anything changes...

The Victron 75/15 smart charge controller is working exactly as it should and I have been using it for 30 days and have had no problems whatsoever. Victron is a quality product and is extremely simple to set up. The Bluetooth function works well with the app and offers plenty of information. Highly recommend.!

Impossible to overstate how clearly superior this product is. We have multiple of them, and regularly camp with sons and others that have other brands. This simply outperforms them in several ways. While the others work - they do the job - this consistently pleases. It's common to see 10% better power harvested from the panel(s), particularly if you can connect a couple in series for 30-40V input. We regularly watch the morning battery recovery from an evening/overnight useage, and this one gets the job done obviously faster. Worth the few extra $. Also the BT functions perfectly, enough range and information.

The 75-15 units work great and stay cool under full load. They work as advertised. That said, the 15A output limit doesn't give you much at 12V (200W) or 24V (400W) (my battery system is 24V LFP), and I made the mistake of undersizing the charge controller against my solar which runs 500W+ in full sun. Hence why I was able to make the comment about them staying cool under full load :-). So I recommend buying the SmartSolar MPPT 100-20 instead of the 75-15. The price point is still very good and those 5 extra amps can make a difference. Plus the 75-15 is limited to 24V battery systems while the 100-20 gives you the flexibility to move to a more powerful 48V battery system in the future. I also have two 100-20's. When maxed out at 20A they generally clock in at 60C and don't go much higher, so not as cool as the 75-15's. But the 100-20's are far more capable, and can handle 12/24/48V without issue. A low speed fan is all it takes to keep them in a nice comfort zone while pushing 20A to the battery. I'm running 70V VOC and 80V VOC (roughly) strings with no issues into these controllers, so the input amps and losses are very low. Thus the charge controllers are limited only by the output amps. The control and programming features are great. I've used the load output directly and the virtual load output (basically a relay control output) as well. There are a few quirks with the direct load output, it can't handle surges at all really, even short ones. The battery profile is completely customizable and output amps can be limited. I actually used one of my 75-15 charge controllers as a high-efficiency level shifter going from a 24V battery to a small 12V battery at one point using the customization to limit the current. -- It would be nice if the "load output" could handle more current and capacitive inflow currents on start. I have used the load output on 24V systems at around 15A without issue driving resistive loads. But just like the Victron battery-protect stuff, these FET-switched load outputs cheap-out on components and just aren't very capable despite the rating. It would be nice if Victron could improve on them but I won't subtract a star since it isn't really the primary function for the charge controller and the virtual-load output works quite well. In fact, one can use the actual load output to switch certain other FET power switches, (or relays, or contactors) very quickly since they are capable of decent gate currents verses VE TX port. So there is versatility here that I like.

I purchased a pair of 100 watt panels and the Victron 75/10 charge controller. They are installed on my work truck to charge a 100AH battery that is connected to a 3KW sine inverter. I got the new upgrades installed on Feb 20th and within a week I had already reached the 10 amp peak output from the controller and still had more output available from my panels. I didn't even know about the 75/15 at the time and especially that it was only about $10 more. If I had known I would have just gotten the 75/15 from the start. It was easy to swap out and setup since I had just done the same thing a week ago. The Bluetooth output has about the same range, limited to about 30 feet and my system is in a metal box which limits it even more. Sure would be nice if it had a longer range. My Victron Energy Smart Battery Sense bluetooth range is much better. The 75/15 charge controller so far has worked nearly flawlessly. Minor idiosyncrasies have been noticed but nothing to really complain about. The controller reassess the power point about every 10 minutes. You can notice it in a steady sunshine condition when it all of a sudden searches the power point. It shows up in the Trend graph also as a small downward spike in the power output of the panels. I haven't maxed out the controller with my 200 watts of panels yet. But I've gotten a peak of 189 watts from them in March with the sun still lower in the sky with summer still far away when the sun will be high in the sky and be much more in orientation of the panels that are basically laid flat and parallel to the ground on the top of my work truck boxes. The recorded information is very nice. You can go back a couple days or up to a month to look at what the system was doing. I do however notice that the Power Graph of the panel watts does short you of peaks. Today I had the 189 watt peak which did show up when I looked at the Trend charge within minutes of it happening. But after the day was over I went back and the peak output was only 157 watts which is a little disappointing and one of the quirks I had spoken of. The History for the day shows that the peak was 186 watts which is much closer to the 189 watts I observed on the screen. Really wanted to see 190 watts but just after that peak the clouds came in and the output was about 50 watts the rest of the day. All in all it is a fine charge controller and I would likely stay within the system if I was to put something more permanent elsewhere than my truck.

This controller is amazing. it's changed so much on what have done with my solar setup. First, it's extremely versatile handing both 12V and 24V panels. it handles lead-acid, gel, and LiFePo batteries efficiently. The bluetooth gives me direct insights into what's going on with the controller.. what it's taking in, what it's sending out. I get clear insights into the charging phase and allows me to know where my battery is at in the charging process. the street light process (and load circuits) has allowed me to put in LED lights that shine on my gate after dark and shut off during the day (based on the solar input thresholds you set). The only slight negative is that you have to be within about 10' of the unit to get bluetooth to connect. it's a little weak, but that's a small price to pay for such an overall amazing unit. Overall, the unit is very well designed, super easy instructions, and mostly intuitive setup. Strong improvement from any other 'dumb' controllers you may have.

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does the job buy again.

Great solar mppt

Va genial,te informa en todo momento y con información en tiempo real de la gestión de carga gracias a su conexión bluetooth, está muy bien de tamaño porque no ocupa mucho espacio, fácil de usar y muy completo.

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