SKU: 69677062306

Genasun 8A MPPT Custom Voltage Boost (Lithium) Solar Charge Controller

$142.77 $158.63
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Description

Genasun 8A MPPT Custom Voltage Boost (Lithium) Solar Charge ControllerGenasun GVB 8 Custom Voltage Boost MPPT Solar Charge Controller for Lithium Batteries Advanced MPPT Boost Technology for Off Grid and Mobile Energy Systems The Genasun GVB 8 Custom Voltage Boost MPPT Solar Charge Controller is engineered for applications where the solar panel voltage is lower than the battery voltage. Unlike conventional controllers that step down voltage, this unit efficiently boosts power from a lower voltage panel to charge a

Genasun GVB-8 Custom Voltage Boost MPPT Solar Charge Controller for Lithium Batteries

Advanced MPPT Boost Technology for Off-Grid and Mobile Energy Systems

The Genasun GVB-8 Custom Voltage Boost MPPT Solar Charge Controller is engineered for applications where the solar panel voltage is lower than the battery voltage. Unlike conventional controllers that step down voltage, this unit efficiently boosts power from a lower-voltage panel to charge a higher-voltage lithium battery pack. This capability allows the use of larger, more cost-effective panels, reducing overall system expense while maintaining high performance.

Designed and manufactured in the USA, the GVB-8 is built for mission-critical reliability. It has been proven in the world’s most demanding environments—from years at sea to harsh Antarctic winters and high-altitude solar-powered aircraft. Each controller undergoes comprehensive electrical testing to ensure dependable operation when it matters most.

High-Speed MPPT: 15 Hz Tracking for Dynamic Conditions

Not all MPPT controllers are equal. Many use a slow sweep-and-sleep method, scanning the voltage range every 30 to 60 seconds. This approach is adequate for stationary panels under clear skies but falls short in mobile or variable conditions. The Genasun GVB-8 features a 15 Hz MPPT tracking speed, adapting to changing light 15 times per second. This ensures maximum energy harvest during cloud transients, on moving vehicles, and in partial shading—capturing power that slower controllers miss.

Precision Charging for Lithium Batteries

The GVB-8 employs a computer-controlled constant-current/constant-voltage (CC/CV) charge profile tailored for lithium batteries. This precise regulation optimises charge cycles, extends battery lifespan, and maximises usable capacity. The custom voltage output is factory-set to your specified level, ensuring a perfect match for your lithium battery bank.

Key Features

  • Boost topology enables charging from panels with voltage below the battery
  • 8 A rated panel input current supports panels up to 150 W (with ~155 mm cells)
  • 15 Hz MPPT tracking for superior performance in dynamic light
  • 95–99% typical electrical efficiency minimises energy loss
  • 99%+ tracking efficiency ensures near-perfect power point accuracy
  • Wide 5 V minimum panel voltage for flexible panel selection
  • Low night consumption (as low as 5 mA) preserves battery charge
  • Compact, lightweight design (14 x 6.5 x 3.5 cm) for easy integration
  • IP40 environmental protection suitable for protected installations
  • Made in the USA with full electrical testing for reliability

Durable and Reliable Construction

Housed in a robust black enclosure with integrated mounting flanges, the GVB-8 is designed for secure installation in a wide range of applications. Multicolour LED indicators provide clear status feedback for Standby, Charging, Full, and Error states, simplifying system monitoring and troubleshooting. Screw terminals accept up to 4 mm² (approx. 12 AWG) wiring for secure, low-resistance connections.

Versatile Applications

The Genasun GVB-8 is ideal for off-grid and mobile systems where panel voltage constraints exist. Typical uses include:

  • Charging 12 V lithium batteries from lower-voltage solar panels
  • Marine and RV installations with limited panel space
  • Remote monitoring and telemetry systems
  • Portable solar generators and field equipment
  • Custom voltage requirements for specialised lithium packs

With its advanced boost MPPT technology and proven durability, the Genasun GVB-8 delivers efficient, reliable charging in the most challenging conditions. Whether you’re powering a remote sensor, a marine electronics suite, or a mobile workstation, this controller ensures your lithium batteries receive optimal charge from every available watt of solar energy.

Power Your System with Confidence

Choose the Genasun GVB-8 Custom Voltage Boost MPPT Solar Charge Controller for your next project and experience the difference that high-speed tracking and precision charging make. Order today to keep your lithium batteries performing at their best, wherever your installation takes you.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 69677062306

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4.9 ★★★★★
Based on 6 reviews
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Product Reviews
C
Cart Curator
Pawtucket, US
★★★★★ 5
Comfortable for daily use!
Color: Dark, Color: Dark
After using this chair for work and general desk time, I think it does a nice job balancing comfort, adjustability, and overall build quality without feeling overly bulky or cheap. It feels designed for people who spend long stretches at a desk and want something supportive but still comfortable enough to relax in occasionally. Assembly was straightforward. The instructions were clear, the hardware was organized well, and all the holes lined up properly during setup. I put it together by myself in around 20 minutes without needing extra tools. Once assembled, the chair immediately felt sturdy and stable rather than wobbly. The overall quality is solid for this price range. The PU leather has a soft feel and doesn’t have the stiff plastic-like texture some office chairs use. The stitching looks clean, the armrests feel secure, and the rolling base moves smoothly across the floor. The chair also feels durable overall, especially around the frame and base where cheaper chairs sometimes feel weak or shaky after a few weeks of use. It's very comfortable. The seat cushion is thick and supportive without feeling overly hard, and it stays comfortable during long work sessions. I’ve spent multiple hours at a time sitting in it without constantly adjusting positions or feeling pressure points. The mesh section in the backrest also helps airflow a bit, which keeps it from feeling too hot during extended use. The lumbar support is great. The backrest naturally follows the curve of your spine and provides good lower back support while still feeling relaxed enough for casual sitting. I also liked the higher back design since it supports the upper back and shoulders well during longer periods at the desk. The flip-up armrests ended up being more useful than I expected. They make it easy to slide the chair under the desk when not in use, and they also give more room if you like sitting cross-legged occasionally. Solid chair overally. It has a good mix of comfort, support, ease of use, and practical features without feeling overpriced.
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Reviewed in the United States on May 26, 2026
T
theman
Birmingham, US
★★★★★ 4
Comfortable, easy to assemble, but no adjustable armrests
Color: Dark, Color: Dark
The Marsail Executive Office Chair Ergonomic Desk Chair with Flip-up Armrests PU Leather was an easy to assemble chair; I was done within 15 minutes with the included tool. Extra screws were included which was nice as the main pack had broken open and I couldn't find one of the primary screws in the larger box (my guess is I probably tossed it on accident with the packaging material) but had the backup so all was well. The instructions were well written and clear. I've now had the chair in my office for over a week. For context; I work from home and also am a PC gamer so I spend a sizeable portion of my time at my desk in the chair. I also live in the southeast US and its April when I am writing this review. With that said; its been in the 70s/80s regularly so feel like I can comment fairly on its performance in warmer temps; though I'll have to try and remember to comeback and update it for the summer season when AC is on full blast and humidity is higher (and the inevitable "swamp butt" sets in). In the first week I've found the chair to be comfortable to sit in. It is wide enough and the arm rests to the side enough that I can sort of lean left and right without much trouble. I like this wider seat and armrests compared to chairs with more narrow span as I tend to shift and move a lot while sitting. The PU leather material feels nice against my clothes and does "grip" the clothing which helps with my tendency to want to slide forward when sitting. At first I thought the "grip" would be annoying but I sort of like it after a week of using the chair. The cushion material is comfortable for sitting and rebounds well after I've been sitting in it for a long period of time. The armrests feature the same sort of cushion and PU leather material which makes them comfortable to sit back and lean on. For the price I think this is a solid office chair and a comfortable option. Longevity will only be tested over time so I'll see if I can remember to update this review over time. I am happy with the chair in my office. A few downsides about the chair that I have: - The wheels are very stiff and don't roll as smoothly as I'd like. They stay put when I am sitting at the desk but when I need to push away they take a bit of force. - The arm rests can't be adjusted for height. They are one height and can only be moved out of the way completely. For someone like who likes to lean or shift sides this is less than ideal as I'd normally make adjustments to the armrests. With that said it is nice to be able to move them out of the way completely when I don't need them. - Lumbar support could be better. I will be using additional support in the chair for my back.
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Reviewed in the United States on April 13, 2026
S
Sal
Cuba, US
★★★★★ 5
Good for sitting on it daily. Not that soft as expected
Color: Dark, Color: Dark
I’ve been using this chair for a few days now and overall it’s pretty solid for a home office setup, especially for the price range. Assembly took me about 30–40 minutes alone and all the parts were labeled clearly. Nothing arrived damaged and the instructions were easy to follow, though attaching the backrest was a little awkward with one person. Once assembled, the chair looks clean and professional. The PU leather feels smooth and the cushioning is definitely thicker than cheaper office chairs I’ve tried. It’s comfortable for working several hours at a time, although I wouldn’t describe it as super plush or “sink-in” soft. The seat has a firmer feel, which may actually be better for posture during long work sessions. The ergonomic support is decent. The backrest follows the shape of your back fairly well and gives noticeable lumbar support compared to flat office chairs. I spend a lot of time at my desk and this chair helped reduce some lower back discomfort. The reclining and rocking feature is also nice for quick breaks between meetings or while watching videos. It doesn’t recline extremely far, but enough to relax a bit without feeling unstable. One feature I ended up liking more than expected was the flip-up armrests. They make it easy to slide the chair completely under the desk and also give more room if you like sitting cross-legged occasionally. The chair rolls smoothly and feels stable even when leaning back. A couple downsides though. The faux leather can get warm after extended sitting, especially in a warmer room. The mesh section helps airflow a little, but not enough to fully prevent heat buildup. Also, while the chair is comfortable, it doesn’t quite feel “premium executive” level in terms of materials. Some of the plastic components and armrests feel more mid-range than luxury. Overall, I’d say it’s a good value office chair with solid comfort, decent back support, and practical features. Great for everyday work or study use, just keep expectations realistic if you’re looking for a super high-end executive chair feel.
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Reviewed in the United States on May 6, 2026
R
Rose Petal
Lowell, US
★★★★★ 5
Comfortable chair constructed with good quality materials
Color: Dark, Color: Dark
Having purchased several chairs from Amazon over the years, I would rank the Marsail Executive Office Chair Ergonomic Desk Chair as one of the better quality options I've received. Here is a breakdown of my experience: Build Quality & Aesthetics I was immediately impressed by the quality of the base. It is crafted from brushed metal and has a substantial, premium feel that sets it apart from cheaper plastic alternatives. Additionally, the pneumatic height adjuster was easy to install and operates very smoothly. Comfort & Ergonomics -- Padding: The padding is not quite as thick as I expected, but it has proven to be very comfortable to sit in so far. Sometimes I am in the chair as much as 10 hours per day, and the foam in the seat holds it's form all day. -- Support: The chair does not include built-in lumbar support, so I am using a lumbar pillow. However, I actually find this preferable; it allows me to adjust the pillow to my exact needs or remove it entirely depending on how I'm feeling. -- Head support and tilt: I like to work in an upright position, but I sometimes i like to lean back for a rest. The chair leans back just enough to allow me to rest my head, but not so much that I feel like it will tip over. The head support is subtle too - it doesn't hurt my neck or force me to rest in an awkward position. Functionality -- The mobility of this chair is excellent. The wheels are high-quality and roll very smoothly on my hardwood floors, which is often a pain point with other office furniture. Final Verdict Despite the thinner padding and lack of integrated lumbar support, the superior materials and smooth mechanics make this a decent value for the money. It’s a sturdy, well-made piece of furniture.
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Reviewed in the United States on April 12, 2026
B
Birdie, Las Vegas, Nv.
Massapequa, US
★★★★★ 4
Good quality office chair with movable arms
Color: Dark, Color: Dark
This chair was relatively easy to put together. After unboxing and laying out all of the parts, my husband and I built it in 22 minutes. We noticed how the instructions have you put the tilt mechanism bracket on after putting the back and arms on. Another chair we built was the opposite, which made attaching it to the base actually easier. That way just made more sense. This way, you put the back and seat together using the arms, then you attach the tilt mechanism to the bottom of the seat, but the seat is at an angle when you do this. Then you lift the whole chair and place it down onto the legs. I'm glad there were two of us to do that part. We also noticed one of the holes for screwing in the arm bracket was not lined in metal like the rest of them were. It still worked, though. It does rock a bit back and forth. The height adjusting rod also locks the chair in place for when you don't want the chair to lean back. There is a knob underneath that allows you to loosen or tighten how much it moves when you lean back or rock. The material is faux leather. It looks like real leather and feels pretty good. This makes it easy to clean. The arms can be raised level with the back of the chair to make it easy to slide out of the side of the chair. Overall this chair has a pretty classic look to it and is comfortable to sit in. It even has some lumbar support. The way the back of the chair and the seat of the chair connect together leaves a little bit of a gap. Nothing major, but you could lose coins or keys through the gaps between the cushions. If you have a cat, this would be a great way for them to poke their paws through and say hello.
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Reviewed in the United States on May 20, 2026

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