Victron EnergySmartSolar MPPT Solar Charge Controller (Bluetooth) - Charge Controllers for Solar Panels - 150V 35 amp 12/24/36/48-Volt

I've used this to charge 48v batteries and it's been excellent. The bluetooth app is really simple and I highly recommend it. When the LifePo4 batteries are totally depleted and the BMS shuts off, not only does this charger wake it self up with solar the next day but it also wakes up the batteries and just works. Used for a month, totally happy

I have used 3 other charge controllers before purchasing this one. The 3 of them were from Harbor Freight, Renogy, and Beleeb. I am electromagnetically sensitive to energy (crystals, magnets, mandalas, etc) and most charge controllers feel energetically uncomfortable to me except this one. I have thoroughly went through all the functions and parameters to see what would relieve me especially when you are living the van life. Your body is continually exposed to magnetic fields, EMF, and radiation when sleeping near various electronic equipment. And for some reason I couldn't sleep well with the previous charge controllers despite playing with the many settings. But this Victron felt better to me. I saw the Bulk, Absorption, and Floating point voltage values were inputtable to 2 decimal places (hundredths place). I looked at my batteries' datasheet, I have 3 Trojan-1275s set in parallel, and lo and behold the datasheet showed 14.82 as my bulk/Absorption voltage, 13.50 for my floating voltage, and 16.20 for equalization that's built into it as an optional function. After inputting these values into the charge controller, I was able to sleep comfortably and in peace. Sure there is Bluetooth that is always on, but it goes to low voltage when not in use, also I have the option to turn off Bluetooth. But be aware you will need accessories to connect directly to your charge controller if you want to turn on Bluetooth. Bluetooth is on by default from the manufacturer. Also it feels better to use tinned copper wire (flexible test lead wire) from the charge controller to your batteries. I kept the length of my wires at 3 feet from the charge controller to the batteries. And on the battery post, if I remember correctly I placed the charge controller's wire with a ring connector lug at the very bottom of the post. The middle connection was a battery cable coming from the other battery, and at the top of the post was my inverter.

Works straight out of the box. This mppt is about 20% more efficient than the inbuilt mppt of my inverter

It does what it is supposed to. 👍🏻

The Bluetooth app for Victron's controllers is really nice. Allows you to customize for your system or use its defaults. The app is a beautiful integration with the hardware and you see in real time how much energy you're working with. I was running one panel into it and then added another in series. The app instantly detected the higher voltage and reflected this in watts & shows the state of my LiFePO4 battery. All I had to do was enter the battery voltage and select the proper battery type. This controller and the app does all the rest.

Very good software

Victron is the standard for solar charge controllers! Easy to use app, performs very efficiently.

Update; Clicking the 'store' button doesn't get you to the manuals. You need to go to victronenergy.com to get there. Not at all obvious. Should have a link from the store or the item, but my question about manuals was answered immediately. After I did that, I was able to get my issues addressed. The service was excellent and 5 stars is deserved. I would certainly buy from this company again.Original review.I just bought the mppt 150 35. Great. Can't read the tiny manual. I cannot find a place to download it. Going to their website yields no results on 'owners manuals'. Tried to find contact info. Nothing, no phone or email. Very frustrated. Is is so hard to offer a download manual button? Not impressed at all so far.