Why The MPT-7210a Charge Controller Might Be The Best Golf Cart Solar Charger 

His is 48v .

That’s awesome. I’ve been using the elejoy and have been super happy with it as well.

Yes, in fact the charger will go offline when the sun stops powering it. Unlike most charge controllers that need the battery to run this one seems to power itself from the panel. I’m not sure about the second question. I haven’t tested that scenario.

@@jeroenbenes7190 with a higher than battery solar panel voltage?

Totally agree with you. At the time the elejoy controller wasn’t available but I have the same controller as you on my forklift and it’s amazing!

I just bought one to try based on your recommendation for my 355w roof panel on my cart. I had read somewhere the controller backfeeds voltage to the solar panel and could cause damage. not sure how true that it but its something I would imagine a shottkey diode could remedy.

I don’t have the manual in front of me but don’t think there is a minimum. At least not in a practical sense.

You’re the first to give a valid argument for one over the other! I’m considering it, thanks for the info.

It won’t overload. The panel and charge controller will charge as much as they can making the range longer than without the panel.

@@BeeneEnergy Thank you very much. Its very helpful.

go into settings, long-press set when on AMPs OUT in settings, it will jump down to the other fields so you can set auto ON/OFF

This one? I have one and it works. Interface is obnoxious to use. US $27.93 40％ Off | MPPT Boost Solar Charge Controller 300W Car Battery Charging Voltage Regulator High-efficiency Charging 24/36/48/60/72V a.aliexpress.com/_mN7yIAW I like this one better, efficiency is good too! Way better than this green unit for ease of use. Check out this product on Alibaba App CE ELEJOY EL-MU400SP MANUFACTURER 400W MPPT SOLAR CHARGE CONTROLLER 99% LED DISPLAY STEP-UP SOLAR CONTROLLER MPPT BOOSTm.alibaba.com/product/62573798904/CE-ELEJOY-EL-MU400SP-MANUFACTURER-400W.html?__sceneInfo=%7B%22type%22:%22appDetailShare%22,%22data%22:%7B%22filterKey%22:%227.8.2_share%22,%22cacheTime%22:%221800000%22%7D%7D

@@BeeneEnergy ive been told that controller has better performance but I agree the interface and options are limited.

This unit is probably less efficient the father apart the panel and battery voltage are. Boost converters are inherently less efficient also. Could be this is all you’ll get but it does seem low. Are you in direct sunlight, no shading on any part of the panel, and panel is angled toward the sun?

@@BeeneEnergy yes not a cloud in the sky. I did see it at 100 watts when I first started trying to charge when the battery was at 54v now. It is at 57.8 and has took 5 hours to put 400whs into the battery. Have not seen it above 80 watts all day. Maybe it has something to do with the battery bms? Still , taking a full day to get from 54 to 58.8 seems like a long top up period. Panel is only 21v so ya, there is a big gap between 58.8v and 21

I’ve learned not to work outside the posted voc limits. That’s an oddly high voltage panel but I know there are all types out there.

You might double check a teardown video but I thought I remember the input capacitor being 60v so it would probably pop it

Lester Bennett you need to determine the specs of that battery for sure. Preferably tear it apart and determine how many cells in series and multiply that by 4.2.

I dont know if it's stil relevant, but you have to set it to the maximum voltage, so the voltage the battery has when it's full. In case of lithium batteries in a 36V pack it should be 42 Volts. You can also check the charging brick for the battery to be sure

@@antonw.415 I agree... if it happens to be a lifepo4 battery it would only want a max of 3.65v not 4.2... I set mine to 58v for my golfcart even though 58.4v is the peak voltage for my pack. it still charges to like 99% and the battery bms isnt kicking in to shut off charging this way.

Yes, it does shut down at night but saves its settings for the next morning.

Yes yes, I think I found this after this video. The mpp voltage in the controller should be set to the “vmp” of the panel not “voc” of panel. For me it would constantly reboot until I got that setting right.

@@BeeneEnergy nice, i have running it for half year for have found that setting.. it a great cheap controller that have never failt me in 3 year of operating.

Quick question, can you get anywhere higher that 1.5 A for a 72v battery? My panel is 330w 35v. Thanks

These are for 24V and UP!... people keep buying these for 12V batteries when it's merely a BOOST CONVERTER!... so *DO NOT USE FOR 12V batteries! for 24/48/72 ONLY*

You can't use this if your panel has higher than battery voltage. It will just act like a forward biased diode (full on all the time).

I wouldn’t do that. Grab yourself a more standard step down mppt controller. Like the powmr 60a I’ve got in a couple other videos. I think they are more efficient anyway with the tests I’ve done.

@@BeeneEnergy I have a 50a SCC to use anyways...but this green MPPTs also has a step down function does it?

@@lutherbertsomera2074 It's only a boost charger. It can't lower voltage. Not sure exactly what happens when you connect a battery that's lower voltage than the panels, but it doesn't work right. It either doesn't stop charging, or it cycles on and off rapidly and doesn't charge. I accidentally did it trying to charge a different battery and quickly noticed it was acting up.

@@volvo09 this i formation contradicts the video, and I think what you are saying is the correct one. This is only a boots converter and that's it, you should not connect higher than battery voltage solar panels

Yep, or if you want a plug and play get one like this. Just gotta connect a panel and the battery and you're off to the races. While the green little guy here is less expensive it's more difficult to program correctly. So if you can spend the extra $100 I'd just get the simple one. amzn.to/36Ux6Ox

Couple things I would verify. Did you put your two panels in parallel? This is a boost controller so the panel voltage should be lower than what you’re trying to charge. Second is the panel voltage setting. I don’t remember exactly with mine but it was cycling off and on due to me not having the voltage dialed in. I’d put it to the vmp of the panel. So for my 46voc panel I have it at around 32v. See if either of those help you out and let me know.

@@BeeneEnergy I wired the two "24V" panels in parallel for this application so that they would be lower than the "48V" battery. I was not able to actually dial in the panel voltage. The indicator on the regulator says the "24V" panels reads about 40V and varies a bit. Thanks for your quick reply!

Okay, I was able to set the panel voltage and possibly have saved the settings by following the operating instructions to the letter however the controller charged passed the voltage setting point and the instructions failed at the 11th step and would not let me set a time to turn off the screen. Thanks for your help

Lol I was thinking that also

Post a link!

@@BeeneEnergy there were a couple us sellers but I think they've sold out www.ebay.com/itm/164328225339?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

Ive only found them on ebay

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Z5ttplRHY9Q.html

Yes that’s one way to skin the cat. And arguably the best. But what are you saying I’m misinformed about?

@@BeeneEnergy at the start of the video your statements implied that we have to find these hard to find, high voltage panels of 50v+ to charge 48v batteries. You then immediately jumped to the boost charge controller leaving out the standard practice of using panels in series. This tells the "new to solar" viewer that they have no other choice but to use a boost controller outside of finding the rare high voltage, high cell panel. It also gives the impression that you are not well informed about the basics of building simple mppt solar systems. I ended up on your video after searching for the part number of this boost charge controller. A new user in a beginner solar Facebook group bought this boost CC for his three 250w panels thinking that the panels have to be in parallel and this boost controller was his only option to charge his 36v bank.

@@neeld.5522 oh that’s funny I was just reading his post on facebook. My whole video was aimed at putting a solar panel on top of a golf cart. Trying to put multiple tends to be limited by space and finding a single panel that is high enough voltage is in fact rare. If you’re not limited to a single panel then absolutely use a buck charge controller.

@@BeeneEnergy oh I totally get that it's a bit of a challenge to have 2 panels on a cart roof and what your goal is with this video. Unfortunately it's easy for new DIY folks in solar to set themselves up for problems and possible house fires in some other cases with the weird information out there. As your statements come across as misleading with how it's worded, I'm kindly asking that you consider dropping another sentence or two in future videos to ensure that everyone joining the DIY solar community has an accurate impression of the technology. You are a content create and you have influence with your videos. Based on your last reply, it would seem that you are informed. So a comment like "Now you could have two or more panels in series with a standard buck mppt CC which is standard practice with mppt solar systems, but fitting more than one panel on a small golf cart can be problematic" would have been very welcomed and would cover the entire audience that has different levels of solar knowledge.