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forum threadWoodSlayR posted Mar 24, 2026 05:59 PM
forum threadWoodSlayR posted Mar 24, 2026 05:59 PM

BougeRV MPPT Solar Charge Controller 40A, with Remote APP Control, Backlit LCD Display, Temperature Sensor, 12V/24V/36V/48V FreeS&H with Prime $119.99

$120

$156

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EASY MONITOR: Pairing the solar controller with your phone via ChargePro 2.0, which makes seeing output and history data a breeze, also allows the charge voltage, current, etc. to be set for different type batteries. The remote app control provides 15 feet signal.
ACTIVE SHIELD: Certified by CE and RoHS. With 6 protections, over-temperature, open-circuit, short-circuit, overload, polarity reverse prevention circuit, flow backwards of current protections. BougeRV MPPT solar charge controller features with dual MOS circuit to prevent the reverse current and to reduce the heat in operation. Maintain your battery all the time. With the heavy-duty heat sink on the back sheet, it can increase thermal effectiveness of the solar charge controller.
INNOVATIVE AND EFFICIENT: Using the latest, fastest MPPT technology, BougeRV 40A MPPT solar controller provides up to 99% conversion rate. With temperature sensor, it is able to support lead-acid battery temperature compensation. Feature negative ground design, the 40amp MPPT solar panel regulator can compatible with most RV or other vehicle system. The design of potting compounds internally can reduce vibrations to keep your solar system working stably on the road.
TRIPLE COOLING DESIGNED: Die-cast aluminum case, internal glue filling, glass panel design, better heat dissipation performance, to ensure that the controller maintains a long time full current output. Heavy duty designed also allows solar charge controller to keep efficient work.

https://www.amazon.com/gp/product...95KM&psc=1
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About this item
EASY MONITOR: Pairing the solar controller with your phone via ChargePro 2.0, which makes seeing output and history data a breeze, also allows the charge voltage, current, etc. to be set for different type batteries. The remote app control provides 15 feet signal.
ACTIVE SHIELD: Certified by CE and RoHS. With 6 protections, over-temperature, open-circuit, short-circuit, overload, polarity reverse prevention circuit, flow backwards of current protections. BougeRV MPPT solar charge controller features with dual MOS circuit to prevent the reverse current and to reduce the heat in operation. Maintain your battery all the time. With the heavy-duty heat sink on the back sheet, it can increase thermal effectiveness of the solar charge controller.
INNOVATIVE AND EFFICIENT: Using the latest, fastest MPPT technology, BougeRV 40A MPPT solar controller provides up to 99% conversion rate. With temperature sensor, it is able to support lead-acid battery temperature compensation. Feature negative ground design, the 40amp MPPT solar panel regulator can compatible with most RV or other vehicle system. The design of potting compounds internally can reduce vibrations to keep your solar system working stably on the road.
TRIPLE COOLING DESIGNED: Die-cast aluminum case, internal glue filling, glass panel design, better heat dissipation performance, to ensure that the controller maintains a long time full current output. Heavy duty designed also allows solar charge controller to keep efficient work.

https://www.amazon.com/gp/product...95KM&psc=1

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Mar 24, 2026 06:11 PM
963 Posts
Joined Jan 2007
sjaxkingpinMar 24, 2026 06:11 PM
963 Posts
Serious question for anyone. Have you ever built a solar system based on 36v battery or inverter? I see mppt controller like this flex 36v, but I dont understand why someone would make that odd incremental jump rather than go either 24v or 48v
Mar 24, 2026 06:13 PM
3,160 Posts
Joined Nov 2014
ValueRangerMar 24, 2026 06:13 PM
3,160 Posts
Max.PV input power:600W/12V, 1200W/24V, 1800W/36V, 2400W/48V.
Mar 24, 2026 06:14 PM
3,160 Posts
Joined Nov 2014
ValueRangerMar 24, 2026 06:14 PM
3,160 Posts
Quote from sjaxkingpin :
Serious question for anyone. Have you ever built a solar system based on 36v battery or inverter? I see mppt controller like this flex 36v, but I dont understand why someone would make that odd incremental jump rather than go either 24v or 48v
36V is fairly common for golf cart charging/battery systems.
Mar 24, 2026 06:39 PM
963 Posts
Joined Jan 2007
sjaxkingpinMar 24, 2026 06:39 PM
963 Posts
Quote from ValueRanger :
36V is fairly common for golf cart charging/battery systems.
Ahh hadn't considered ppl charging them from solar. Ty
Mar 25, 2026 12:33 AM
4 Posts
Joined Oct 2024
MellowPocket869Mar 25, 2026 12:33 AM
4 Posts
Is there any cheap 48v battery from AMAZON or ALI worth purchasing to use with this?
Mar 25, 2026 02:43 AM
242 Posts
Joined Dec 2004
digablesoulMar 25, 2026 02:43 AM
242 Posts
don't ask why.. but with all these sales.. i have a 12v, a 24v, and 48v lifepo4 batteries that i've collected.. that i all swap with this one controller which charges all of them which is nice. then i use each lifepo4 as an extra battery to extend D2's. it's held up for a year so far. knocks on wood
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Mar 25, 2026 04:36 PM
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WoodSlayRMar 25, 2026 04:36 PM
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Quote from ValueRanger :
Max.PV input power:600W/12V, 1200W/24V, 1800W/36V, 2400W/48V.
Or in other words, it's a 40 Amp charge controller.
Last edited by WoodSlayR March 25, 2026 at 03:41 PM.
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Original Poster
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Mar 25, 2026 04:50 PM
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WoodSlayRMar 25, 2026 04:50 PM
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Quote from sjaxkingpin :
Serious question for anyone. Have you ever built a solar system based on 36v battery or inverter? I see mppt controller like this flex 36v, but I dont understand why someone would make that odd incremental jump rather than go either 24v or 48v
It's def not as common, but on the same hand, it's really not that odd. (They are actually all even numbers. haha) 12, 24, 36, & 48 are all just multiples of 12. My Trolling motor is 36v. I also see it's somewhat common in the e-scooter/e-bike world as well. So theres that.
Last edited by WoodSlayR March 25, 2026 at 10:02 AM.
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Mar 25, 2026 05:01 PM
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WoodSlayRMar 25, 2026 05:01 PM
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Quote from MellowPocket869 :
Is there any cheap 48v battery from AMAZON or ALI worth purchasing to use with this?
48v batteries aren't cheap. You can expect to pay around 400% or 4 times more than a 12v battery with the same Ah rating, but that's because a 48v 100Ah battery has the same capacity as a 12v 400Ah battery. With that being said, you can usually find good deals at any given time if you shop around. Capitalism for the win.
Last edited by WoodSlayR March 25, 2026 at 12:03 PM.
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Mar 25, 2026 05:13 PM
963 Posts
Joined Jan 2007
sjaxkingpinMar 25, 2026 05:13 PM
963 Posts
Quote from WoodSlayR :
It's def not as common, but on the same hand, it's really not that odd. (They are actually all even numbers. haha) 12, 24, 36, & 48 are all just multiples of 12. My Trolling motor is 36v. I also see it's somewhat common in the e-scooter/e-bike world as well. So theres that.
Ty. I was thinking of why people would build a solar system in between 24v and 48v. I hadn't considered folks using a dedicated mppt controller and array for 36v devices.
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Mar 25, 2026 07:11 PM
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WoodSlayRMar 25, 2026 07:11 PM
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Quote from MellowPocket869 :
Is there any cheap 48v battery from AMAZON or ALI worth purchasing to use with this?
I think this deal for a 100ah 48v battery for $600 is about as good a price as you're gonna find for a reputable brand 48v battery. Then again, seems like prices for LiFePo4 batteries in general have been falling and falling faster than you can blink an eye. I don't know how much cheaper they're gonna get, but if you compare prices of today to just a few years years ago, it's a drastic difference. It really wasn't that long ago like in 2020, a decent brand name 48v 100ah battery was typically a couple thousand dollars or even more for the bigger brand names. Now you can find them regularly for around 700 bucks or evencheaper if you get lucky.
https://slickdeals.net/f/19311291-eco-worthy-51-2v-100ah-lifepo4-battery-with-bluetooth-lcd-final-price-601-90-free-shipping?src=SDSearchv3&attrsrc=Thread%3AExpired%3AFalse%7CSearch%3AType%3Aac_keyword%7CSearch%3ASort%3Arelevance%7CSearch%3AHideExpired%3Afalse
Last edited by WoodSlayR March 25, 2026 at 02:49 PM.
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Mar 26, 2026 10:25 PM
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WoodSlayRMar 26, 2026 10:25 PM
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Quote from sjaxkingpin :
Ty. I was thinking of why people would build a solar system in between 24v and 48v. I hadn't considered folks using a dedicated mppt controller and array for 36v devices.
It's not because there are a lot of devices that run off 36 volts directly. But its the same with 24 and 48v. There are exceptions, but for the most part, the vast majority of everything that uses electricity, runs off either 12v DC or 120AC, so it's not like using 24, 34, or 48v isn't going to still be converted to a more useable voltage & type of electricity anyways.
Last edited by WoodSlayR March 26, 2026 at 03:28 PM.
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