SKU: 22076908283

Genasun 54.2V 8A GVB-8 Waterproof MPPT Boost Solar Charge Controller

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Description

Genasun 54.2V 8A GVB-8 Waterproof MPPT Boost Solar Charge ControllerGenasun 54. 2V GVB 8 Waterproof MPPT Boost Solar Charge Controller The Genasun GVB 8 Li 54. 2V WP is a compact waterproof MPPT boost solar charge controller designed to charge 48V nominal, 13S lithium ion, LiPo and LiCoO battery packs from lower voltage solar panels. Instead of requiring a solar panel string with a voltage higher than the battery, the GVB 8 WP steps the panel voltage up, making it a practical choice for e bikes, golf carts, small EVs,

Genasun 54.2V GVB-8 Waterproof MPPT Boost Solar Charge Controller

The Genasun GVB-8-Li-54.2V-WP is a compact waterproof MPPT boost solar charge controller designed to charge 48V nominal, 13S lithium-ion, LiPo and LiCoO₂ battery packs from lower-voltage solar panels. Instead of requiring a solar panel string with a voltage higher than the battery, the GVB-8-WP steps the panel voltage up, making it a practical choice for e-bikes, golf carts, small EVs, marine systems, industrial DC systems and other compact solar charging applications where panel space and wiring simplicity matter.

This model is the 54.2V CC/CV lithium version. It is intended for battery packs whose charging specifications match a 54.2V constant-voltage profile. Genasun’s official documentation identifies the GVB-8-Li-54.2V-WP for 48V nominal, 13S lithium cobalt, manganese or nickel chemistry packs, with battery temperature compensation disabled for lithium operation.

Boost charging for lower-voltage solar panels

Most solar charge controllers are buck controllers, meaning they require the solar array voltage to sit above the battery charge voltage. The GVB-8-WP is different. It is a voltage-boosting controller, allowing a lower-voltage panel to charge a higher-voltage battery when the panel and battery remain within the controller’s specifications. This can help simplify small vehicle and mobile solar layouts by reducing the need to series-connect smaller panels just to reach the required battery voltage.

The controller supports a maximum recommended panel power of 350W for this 54.2V lithium model, with a rated panel input current of 8A, a recommended maximum panel Vmp of 43V and a recommended maximum panel Voc of 50V at STC. The input voltage range is 0 to 60V, with charging able to begin from a minimum panel voltage of 5V.

Why choose the waterproof GVB-8-WP?

  • True MPPT boost design: Steps up lower panel voltage to charge compatible higher-voltage battery packs.
  • 48V 13S lithium profile: Factory configured for a 54.2V CC/CV charge profile.
  • Waterproof construction: IP68 environmental protection with potted electronics for exposed mobile and marine-style installations.
  • Fast tracking: 15Hz MPPT tracking speed helps the controller respond to changing light conditions.
  • Efficient operation: 96% to 99% typical electrical efficiency for the 54.2V lithium model, with 99+% typical tracking efficiency.
  • 12 AWG flying leads: Newer GVB-8-WP units from serial number 188100 use 12 AWG tinned, pre-stripped flying leads.

Built for compact mobile solar systems

The GVB-8-WP’s sealed construction and flying-lead wiring make it well suited to applications where terminal blocks may be less desirable, including roof-mounted solar charging on golf carts, e-bikes, small EVs and marine equipment. The built-in multicolour LED provides straightforward charging, standby and error indications, while the external in-line fuse helps protect the battery connection wiring when installed as directed.

Genasun specifies no fans and no relays in its controller design, helping keep the unit compact and simple. The controller’s low night consumption of 5mA is also useful in smaller battery systems where parasitic draw matters.

Important battery and installation considerations

Because this is a lithium charge controller with a fixed 54.2V CC/CV profile, the battery pack’s charge voltage, cell count and chemistry must match the controller. Genasun also recommends using lithium batteries with a Battery Management System capable of disconnecting the solar charge controller if any cell is outside its rated temperature, current or voltage range.

For a compact, waterproof MPPT boost solution for compatible 48V 13S lithium battery systems, the Genasun GVB-8-Li-54.2V-WP provides a technically strong way to harvest solar from lower-voltage panels in mobile and off-grid DC applications.

Shipping Notes
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SKU: 22076908283

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ART
Grantham, US
★★★★★ 1
Nothing i wrote my comments above a statement above
Size: XX-Large, Color: Navy Blue
This item was not good quality, so I decided to not not use. It came pretty much wrinkled and folded in some package. And once again, it was not good quality was all wrinkled up you had to Send it to the cleaners to straighten it out and it didn't fit very well. It just wasn't there very good quality, kind of heavy, so so\n I'm not sure if I'll return it or just donate it to the local church. Thank you art cruz
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Reviewed in the United States on April 5, 2026
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Popa Rabbit
Charlottesville, US
★★★★★ 5
Fantastic product... fantastic fit !
Size: X-Large, Color: Black
First off, China got this product from their country to ours, then to my hometown.... faster than my own post office could get it across town after much bickering. So... thank you to the Chinese. Complaints about America being better... then start doing better. Secondly the coat was far superior than I even suspected. It fit well and I cannot wait until cooler weather to break it out ! Again... thank you China ! Highly recommend this product.
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Reviewed in the United States on August 25, 2021
J
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John In NC
Cuba, US
★★★★★ 5
Once You Try Them, You'll Buy More!
Size: 46W x 36L, Color: Stonewashed
I'm tall (6'3"), and when I was young, I used to be thin as a rail (though decades of three squares a day has changed that). So finding jeans that fit well has always been challenging. A long inseam (36") made purchasing jeans at retail stores an exercise in futility. So for many years, I bought my jeans from cataloger Eddie Bauer. Oh sure, I would try other mail order firms from time to time, but never found a pair of jeans that fit comfortably. I'm no longer young (Daddy was feeling his oats when Ike was in the White House) and much of the vanity that plagued me in my youth has dissipated. Be forewarned as you continue reading, that comfort, not appearance, now tempers all my purchasing decisions. It was time to purchase a couple pairs of jeans, and because Eddie is getting awful pricey, I decided to see what was being offered here on Amazon. The price was right, and the reviews were good, so I ordered a pair of these "just to see". Boy, I'm I glad I did!! These jeans are designed for guys who want comfort over a full range of movement. First, the material; although the description says "flex denim", it is not "stretchy" (remember double-knit?). I think they may be referring to the fact that the material is a bit lighter weight than your average jeans, thus avoiding much of the stiffness. The material reminds me very much of some painter's pants I owned years ago; soft and very pliable. Now for the fit; generously cut (though not baggy) in the seat and crotch. No binding of your manhood when you sit or squat! Plenty of room in the legs too. The waste is cut high enough so your belt sits comfortably above your hips, avoiding the embarrassment of plumber's crack when you're on your hands and knees, bent over without your glasses, looking for that damned little screw you dropped. Finally, the inseam length is also generous. When you're sitting with your legs crossed, these pants won't be jacked half-way up your calf. So, in conclusion, if you're trying to make a fashion statement with hip-hugging, tight-legged, twig & berry squeezing pants, you will be sorely disappointed with these jeans. But, if you're a working man, looking for a well-fitting, comfortable pair of britches, I'll bet you a fresh tin of Shinola and a Moon Pie, that you will appreciate slipping into a pair of these jeans!! I just ordered two more pair!!
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Reviewed in the United States on January 14, 2015
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Buster B
Waukegan, US
★★★★★ 5
Wranglers fit me better than most denims.
Size: 46W x 28L, Color: Stonewashed
Nice fit and lighter weight denim than any jeans.
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Reviewed in the United States on January 26, 2026
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Suzanne J
West Palm Beach, US
★★★★★ 4
Comfortable but Baggy Legs
Size: 42W x 36L, Color: Stonewashed
My husband thinks the jeans are comfortable. However, the thigh portions are sort of baggy looking on him compared to other straight leg stretch jeans by other companies such as Levi and Lee. At least I think these are straight legs. It did not say, "relaxed Fit" in the ad anyhow. They are always more baggy. Otherwise, the jeans are fine.
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Reviewed in the United States on October 31, 2013

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