Renogy 500A Battery Monitor with Shunt, High and Low Voltage Programmable Alarm, Range 10V-120V up to 500A, 20ft Shielded Cable, Compatible 12V Lithium Sealed, Gel, Flooded Batteries,Black

Just finished installation in our RV. Would suggest Renogy consider a WiFi solution for remote access to monitor your batteries remotely. Ours is in storage many months and would like to have the convenience factor! Other than that running the monitor wire took the majority of time, just because it’s labor intensive! Installation was straightforward and a piece of cake…not only that but it worked the first time!!!!

The 300ah lithium battery I purchased did not have Bluetooth capabilities so this shunt was a must have works perfect no issues

Great! It tells you in and out wattage and voltage really nice to see what the sun is doing and how you’re using it. And how long you can use it. That’s a big one! And how long to charge it. easy to install I like it

Nice design. Well packaged. Clear instructions. Simple interface. Good screen layout. Adjustable backlight. Good screen contrast. The shunt is factory calibrated by filing on the edge of the resistive element. This was expected. But compared to my calibrated current meter it is off by about -10%. Meaning it reads current levels about 10% lower amplitude than actual. It is symetric around 0 though, so charging and discharging % is correct as long as the battery capacity is derated by 10% also. And since it is -10% that means I could file it some more to bring it in to spec. But I decided to just leave it as is. My old setup used a hall sensor which was very accurate in the charging polarity, but as I eventually discovered it was way off in the discharging polarity. Having a symetric current sensor is much more important than having a perfectly accurate current sensor. According to the box there is a 350A model available which would have been better for my application, but I could not find that version for sale. My only gripe is that I wish there was an alarm output. Something that changes state when the low voltage alarm is active.

This meter is much more accurate than my Bluetooth app that came with EG4 WP 48V-100Ah battery, which only updates every 5 seconds and doesn’t tell you that they “hold back15% of the battery capacity. It’s got variable illumination modes and every metric is configurable…though it’s a little too easy to hold the up arrow and reset battery meter in the middle of your cycle. The other reviews are correct that the + wire to the battery is tiny and the hole in the shunt seems tiny-er…it will eventually fit if you have patience and make sure the set screw is backed ALL THE WAY OUT (keeeeep turning). It’s best to do this part first, before you mount everything so you can get to, and still see, the tine hole. Also, the posts on the 500Amp version are enormous so get ready to buy some huge ring terminals to fit as all load has to pull through the shunt so you’ll want to combine several load wires per connector. Also, they don’t tell you but you’ll need some big power wire as it’s not included (see pics-I had an old winch power wire that I cut to fit). I would definitely purchase again.

Just a backgroud. I had purchase 2 of the L**X brand, the full color version. Looked great. But the menu was no longer the one that they have now. It seems there are 3 versions and no one has the one I had. They never tid work based on extensive instructions from the selle. FAST FORWARD TO RENOGY! EXCELLENT ALL THE WAY AROUND! For the two I had, I swapped out thee shunt, did a little rewirie to clean up the backup battery setup, connecte dthe Renogy and it powered on. The default Ah is 100 and that's what I have. All set up with nothing else to do! Aftre about 15 hours of work on the others with no results, I am AMAZED. Now THIS is how you do it. I did the soemwhat more difficult replacement in my ham radio portable kit (inside a rack-mount case, where the shelves have to be removed). Replacing the shunt and everything else wasn't as easy, that not due to Renogy; my setup is compact and under layers and it is hard to get to things inside. But for making the mounting plate to replace the smaller piece I had, I just plugged in tin and there it was! Set the capacity (will need to redo after a full charge and there, right in the menu was an easy setting for the Ah, which took moments. Everything works as it is supposed to and all very easy. Almost sets itself up once installed and powered Love my Renogy suitcase panels and these are completely excellent. The screen, when off, is a dim grayscale, but draws no current at all somehow. Looks fine in the light. The green screen wout be nice in high contrast plack and white or full color, but I only mention this to my low vision. I can do without the nice screen for this easy setup and bigger screen. BUY THS IS YOU NEED A MOINITOR (OR TWO OR THREEE!)

This battery monitor has made understanding my solar system status much easier.

Worth the piece of mind. At a glance you can see your charge level and current usage.

Work fine in the application I need it for

Works great for me applications, boat and rv with this you control your battery power accurate, what is going out, and what is coming in

What did I like ? - the fact that everything you need comes in the kit. Wire(s), shunt, gauge just plug and play. It’s easy, then it all comes alive. Great ! 👍😊

Works just as it should. Good quality and easy to install. Super useful, sensitive and accurate. Love being about to see what is going on with our battery. Weather we have a small load, we left something on or wondering if the solar is charging or not. Since your solar might not keep up with your demand: the solar charger along wont tell you if your battery is charging or not. You still need a battery monitor. I recommend this with or without solar if you are relying on battery status in anyway.

Most people are using LiFePO4 batteries these days, for that reason it would be really good to have another alarm setting for high voltage which this current version does not have. This way you can set something like 13.8v and when charging reaches that I can just stop the charger. For me I'm using a NOCO Charger and have no way to stop charging unless I want the batteries 100% full and charging to 14.5v. You might ask why I don't want to charge to full and the answer is for a few reasons. 1) If you charge between 10% to %90 for LiFePO4 you increase the cycle life from what I've read. A 3000 cycle battery might be 4500 cycles with that small change. 2) If there is a cell out of balance and its slightly higher in voltage than the others, your always going to push that one cell to its limit and that can degrade the battery health. One of my 12v batteries has the BMS cutting charging off at 13.9v which is before the NOCO charger completes charging. So what happens is a loop where the BMS cut power and the NOCO charger jumps to 19v and shows voltage error, once the BMS times out charging starts again and the cycle repeats. Not great. 3) Its easier on all the electronics. When a battery is full the resistance goes up. Stopping charging early saves heat and stress to some of the components in the battery BMS and charger circuits. The last improvement for the battery monitor would be to have ability to set it to re-calibrate the shunt AH reading every time you charge to a set voltage. Currently you need to manually set the top and bottom voltage and the total AH. So over some charge cycles there will be a drift. If I set my completion of charge to 13.8v it could reset each time it hits that voltage so I start with 100ah count down from there for example. With LiFePO4 you can not use voltage to figure out capacity accurately unless its at the top of the charge curve where its starting to shoot up rapidly so this would need to be something stated in the manual but for the people that know it would work well.