Built for Mobility Off-Grid Power Systems Supports 12/24/48V Systems up to 50A
MPPT
Up to 99.5% Tracking Efficiency
Up to 98% Conversion Efficiency
Compact for Mobility
Plug & Play
Expansion
Panel-Level
Optimization
Mix & Match Panels
Mix different brands, specs, types of
panels freely.
Anti-Shadow Optimization
Shade one panel, the rest still shine.
Tough & Robust
Automotive-Grade Aluminum Alloy Shell
-40°F to 149°F
IP68 Waterproof
Built to last
· 10-Year Warranty
· Fully Certified
OptiSolex SolexBrick S1:
Next-Gen MPPT Solar Charge Technology
The S1’s Quad-Channel architecture works like a V8 engine, processing four power streams simultaneously for higher conversion efficiency and reduced ripple. That's why it can fit full protection features into a body 1/6 the size of traditional controllers, while delivering stable output even in high heat or altitude.
Powered by InstantMax AI, each S1 acts like it has its own “brain”, optimizing each panel individually while coordinating with others to share load intelligently. This makes it easy to expand your system, mix different panels without efficiency loss, and maintain full output of unshaded panels even if one panel is shaded.
Compact Size, Flexible Mounting
At just one-sixth the size of a traditional controller, the SolexBrick S1 fits almost anywhere—mount it directly behind a solar panel or tuck it inside a portable solar suitcase. Free up valuable space in your RV, van, or overland rig for the gear you really want to bring, without compromise.
OptiSolex Solar System
No interior space needed – bring more gear
Other Solar Systems
Takes up interior space + needs cooling clearance
SolexBrick S1:
Smaller. Smarter. Stronger.
S1 Controller (50A)
Traditional Controller (50A)
$159.99
$250+
1/6 The size — saves space
Bulky — takes up interior space
Plug & play installation
Needs mounting & wiring
Smart communication between S1s
No communication between units
Auto-detects battery voltage
Manual voltage switching needed
Metal shell — heat & drop resistant
Plastic shell — fragile & heat-sensitive
IP68 waterproof
Not waterproof
10-Year Warranty
2–5 year warranty
Zero-Wire Hassle: Plug & Play
No wiring needed - just plug in to avoid loose connections and short circuits. Designed for complete beginners, with error-proof connectors.
10min
2+ hours. One mistake can kill the entire install.
No learning curve
Electrical skills needed
Screwdriver, banner
Screwdriver, wire stripper, drill, waterproof tape, cable ties, multimeter...
Foolproof design
Polarity/loose wire risks
3 steps setup
Cumbersome Steps
Scaling Made Simple
Effortless Portable Solar Expansion
The 440W SolarBag Kit gives you instant solar expansion—no roof space required. Just plug into the S1 controller and connect directly to your battery. No mounting, no rewiring, no extra charge controller needed.
Future-Proof Mountable Solar Expansion
Future-proof from day one. With the S1 as your controller, adding more rigid panels later is a breeze: just plug in another S1 to expand—series or parallel, no hassle, no rebuild, more power.
Mix & Match Different Panels
Add Panels Easily
Maximize Roof’s Potential
Compact & Space-Saving
Mix Brands
Use any brand to replace damaged panels – no brand restrictions, no upgrade headaches.
Mix Specs
Mix 100W and 200W panels seamlessly to utilize every inch of your RV roof - no wasted space, no compromise on power.
Mix Types
Combine rigid and flexible panels to create a custom energy solution that perfectly fits your unique space and power needs.
Anti-Shadow Optimization
Traditional controllers treat all panels as one, so if a single panel is shaded, the whole system slows down. The SolexBrick S1 changes that. By independently optimizing each panel, it keeps the rest producing at 100% output even if one is partially shaded—whether from changing sun angles or passing obstacles. The result: higher energy harvest from dawn to dusk, every single day.
Maximum Power,
Real Mobility Off-Grid Freedom
Where most solar setups struggle—with limited roof space, patchy shade, or desert heat—OptiSolex keeps delivering.
Together, this ecosystem gives you more watts, more freedom, and the peace of mind to travel further, stay longer, and wake up to views you'll never forget—knowing your batteries are always ready.
Built for Mobility Solar System
No manual adjustment needed—The SolexBrick S1 automatically detects and adapts to 12/24/48V battery voltage through its algorithm, making it worry-free.
Designed for All Tasks
The SolexBrick S1 delivers worry-free power from -40°F to 149°F (-40°C to 65°C), surviving Death Valley heat and Alaskan blizzards so you focus on conquering trails—not battery anxiety.
Multiple Protections for LiFePO4
The SolexBrick S1 delivers comprehensive lithium battery protection, guarding against overcharging, over-discharging, short-circuting, overloading, reverse current and lightning strike.
Certified & Reliable with 10-Year Warranty
Certified to meet FCC, CE, UKCA, RCM and RoHS standards. All backed by an industry-leading 10-year warranty for total peace of mind.
OptiSolex Ecosystem for Peak Performance
True performance isn't just about higher numbers—it's about harmony. The SolexBrick S1, 440W SolarBag, and 200W Mountable Solar Panel are engineered to fit together seamlessly, unlocking the system's full potential. From blazing efficiency in the sun to thoughtful storage and mounting design, this ecosystem doesn't just power your journey—it frees you to enjoy it.
One S1, Total Power Control
For peak performance, we recommend pairing each panel with its own SolexBrick S1. But even one S1 powering the whole array still beats most standard controllers in efficiency and control.
One S1 to One Panel
One S1 to Multiple Panels
Other Solar Systems
Nanosecond response time
Nanosecond response time
Slow & Unstable
✔ Easy Setup
✔ Easy Setup
✔ Anti-Shadow
✔ Mix & Match
More You Buy, More You Save
S1 (Single Unit)
S1 (2-Pack)
S1 (3-Pack)
$159.99
$287.99
$407.99
450W
2x S1 in series: 460W
2x S1 in parallel: 900W
3x S1 in series: 690W
3x S1 in parallel: 1350W
- ✔ Plug & Play Instation
- ✔ Future-Proof Expansion
- ✔ Plug & Play Instation
- ✔ Future-Proof Expansion
- ✔ Mix & Match Panels
- ✔ Anti-Shadow Optimization
- ✔ Plug & Play Instation
- ✔ Future-Proof Expansion
- ✔ Mix & Match Panels
- ✔ Anti-Shadow Optimization
Power That Experts Trust
ReeWray Outdoors
99.8K subscribers
Off-grid expert Reewray Outdoors shows how OptiSolex SolexBrick S1 unlocks higher real-world power from each panel. His tests prove major gains in mixed panel setups and shaded conditions — delivering more watts when they matter most.
Frugal Off Grid
100K subscribers
In this video, Frugal Off Grid, a 5-year off-grid homesteader, highlights the OptiSolex 400W Portable SolarBag and its SolexBrick S1 MPPT controller. He emphasizes how the S1 makes the 440W SolarBag kit more convenient by allowing direct connection to lithium batteries. He also highlights the kit’s compact, modular design and easy, plug-and-play setup.
Woodswalker 1965
25.1K subscribers
Camping lover Woodswalker hits the trails of the Pacific Northwest with gear that keeps every mile powered. See how 440W of compact and portable solar fits into real overlanding adventures.