About the Product
Longest lifespan in the lineup
Your fridge never skips a beat
Stretch 6 hours to ~18
+ Lifetime U.S. Support
Impossibly thin. Incredibly reliable. The only battery backup built for your fridge.
Most backup power solutions ask you to do something when an outage hits — wheel out a generator, run extension cords, plug something in. GenBox 1200S doesn’t. It lives behind your refrigerator, mounted to the wall or tucked on a floor stand, always plugged in, always charged, always monitoring the grid.
The moment power fails — day or night, whether you’re home or not — it switches to battery power in under 20 milliseconds. Your refrigerator never knows there was an outage.
Mounts behind your refrigerator in 10 minutes. No electrician. No wiring. No fuel. Just quiet, automatic backup that’s there when it counts.
The Problem With Every Other Refrigerator Battery Backup Option
During a power outage, most homeowners face one urgent question: how do I keep my food from spoiling? A full refrigerator represents hundreds of dollars of groceries. A chest freezer might hold a family’s meat supply for months. And food spoils after just 4 hours in an unpowered fridge.
| Gas Generators | Portable Power Stations | GenBox 1200S | |
|---|---|---|---|
| Automatic switchover | ❌ Manual start required | ❌ Must be plugged in manually | ✅ Under 20ms, automatic |
| Indoor safe | ❌ Carbon monoxide risk | ✅ Yes | ✅ Zero fumes, zero noise |
| Catches brief outages | ❌ Often missed | ❌ Usually stored elsewhere | ✅ Every outage, every time |
| Works while you’re away | ❌ Requires someone present | ❌ Requires someone present | ✅ Yes — automatically |
| Fuel & maintenance | ❌ Ongoing fuel + service | ✅ None | ✅ None |
Switches in 20 Milliseconds. Your Fridge Never Knows.
When the grid fails, GenBox 1200S detects the drop and switches to battery power in under 20 milliseconds — faster than any appliance can register a change. Your refrigerator keeps cooling. Your CPAP keeps running. Your Wi-Fi stays connected.
During normal operation, GenBox passes grid power straight through to your appliance via a smart bypass circuit — no battery drain, no inverter wear, no extra electricity cost. The battery sits full and ready. When power fails, it activates instantly. When power returns, it recharges automatically and resets.
You could leave for a two-week vacation and come home to a full refrigerator after three outages. You’d never know.
Built to Last 13+ Years.
1,382Wh LiFePO₄ battery rated for 5,000 cycles to 70% capacity. Install it once. Rely on it for a decade — or two.
- Set it up once and rely on it for 10–15+ years
- No battery replacements — ever
- Lower total cost of ownership than any portable power station in its class
- Engineered for continuous plug-in cycling — won’t degrade from being left plugged in long-term
Eco Smart Cycle: Stretch 6 Hours to ~18 With One Setting.
Facing a multi-day outage? Eco Smart Cycle puts you in control. Using the free Ionic GenBox app (iOS or Android), program custom on/off intervals. During run cycles, GenBox delivers power. During rest cycles, it conserves battery, and well-insulated modern refrigerators stay cold for hours with the door closed.
Example: set GenBox to run for 2 hours, rest for 4 hours, repeat. Instead of ~6 hours of continuous runtime, you stretch the same charge to approximately 18 hours of protection — without touching anything after setup.
| Strategy | Interval | Extension |
|---|---|---|
| Conservative | ON 2 hrs / OFF 3 hrs | ~2.5× longer |
| Balanced | ON 2 hrs / OFF 4 hrs | ~3× longer (~18 hrs) |
How to set it up:
- Download the free Ionic GenBox app (iOS or Android)
- Connect via Bluetooth — works even when Wi-Fi is down
- Enable Eco Smart Cycle
- Set your run/rest intervals
- GenBox manages the cycle automatically
Eco Smart Cycle controls GenBox’s power delivery intervals. It does not directly control your appliance, monitor food temperature, or guarantee specific food safety outcomes. Actual results vary by refrigerator model, ambient temperature, and door-open frequency.
Expandable to 5.5kWh. Build Your System.
The GenBox 1200S base unit powers a full-size refrigerator for approximately 6 hours — owner-verified. Need more? Stack up to 3 GenBox-1.3B Expansion Modules (sold separately) to scale your battery system to 5.52kWh and 24+ hours of continuous runtime. Start small. Expand as your needs — or budget — grow.
| Configuration | Capacity | Full-Size Fridge | With Eco Smart Cycle |
|---|---|---|---|
| Base unit only | 1.38kWh | ~6 hours ✓ | ~18 hours ✓ |
| Base + 1 module | ~2.76kWh | ~12+ hours * | ~36+ hours * |
| Base + 2 modules | ~4.14kWh | ~18+ hours * | ~54+ hours * |
| Base + 3 modules | ~5.52kWh | ~24+ hours * | ~72+ hours * |
✓ Base unit runtime (~6 hrs full-size / ~18 hrs with Eco Smart Cycle) is owner-verified. * Expanded configuration runtimes scale proportionally from the verified base unit figure and are estimated. Actual results vary by appliance model, ambient temperature, and usage. Smaller refrigerators and chest freezers may run significantly longer.
Impossibly Thin. Mounts Anywhere.
At just 3.8 inches deep — less than the width of your hand — GenBox 1200S fits in spaces no other battery backup can reach. Mount it vertically behind your refrigerator, above your freezer, or on any wall near an essential appliance. Floor stand included if you’d rather not wall-mount.
- 25.4″ tall  · 3.8″ deep  · 12.0″ wide  · 33 lbs
- No tools beyond a standard drill
- No electrician required
Plug your appliance into GenBox, plug GenBox into your wall outlet, and you’re protected.
Compared to typical portable power stations (often 12″ × 12″ × 9″ or larger), the GenBox 1200S nearly disappears into permanent installation.
Solar Ready. Charges While Your Fridge Runs.
GenBox 1200S includes a built-in MPPT solar input accepting up to 400W of panels (11–50V DC). With a 400W panel, the battery charges while your refrigerator continues running — extending your backup window through every daylight hour without any grid connection. That’s efficient.
For off-grid cabins or extended outages, connect two 200W panels in parallel for full daily cycling: refrigerator runs overnight on battery, panels recharge it through the day. Silent. Fuel-free. Sustainable.
Solar panel sold separately. “Charges while running” verified for 400W panels. Smaller panels provide supplemental charging at slower rates.
Pure Sine Wave. Safe for Every Appliance.
GenBox 1200S delivers 1,200W continuous power with 1,350W peak surge capacity, using pure sine wave AC power — the same waveform as grid electricity. Variable-speed compressors, electronic controls, and sensitive medical equipment all operate exactly as they should.
| Within 1,200W — Compatible | Exceeds Capacity — Consider GenBox 2400 |
|---|---|
| Full-size refrigerators (150–200W) | Microwave ovens (1,000–1,400W) |
| Chest or upright freezers (80–150W) | Space heaters on high (~1,500W) |
| Refrigerator + freezer simultaneously (250–350W combined) | |
| Sump pumps (500–800W during operation) | |
| Home office: router, modem, laptop (200–400W combined) | |
| Medical: CPAP, oxygen concentrators (50–200W) |
Fully Recharged in 1.5 Hours.
Among the fastest recharge times in its capacity class. After an outage, plug it in — GenBox 1200S is ready for the next one in about 90 minutes.
Generator Hybrid Strategy: Run your generator for 1.5 hours to fully recharge your GenBox. Shut it down. Run silently on battery for the rest of the day. Repeat as needed.
- Fuel consumption reduced by 90%+
- Generator noise limited to ~1.5 hours per day
- Extended generator life (hundreds of hours instead of thousands)
- Quiet nights and days with only brief generator runtime
Start with one unit. Add more as budget allows. Each unit is independent — one needing a recharge or service doesn’t affect any of the others.
How Customers Use GenBox 1200S Backup Battery Power
Refrigerator & Freezer Protection
Install GenBox 1200S between your wall outlet and your refrigerator. It stays plugged in, monitors the grid automatically, and switches over the moment power fails — whether you’re home or away. Your food stays cold. You don’t have to do anything.
Multi-Appliance Protection
One GenBox 1200S per appliance — no extension cords, no single point of failure. Many customers run one at the kitchen refrigerator, another at a basement freezer, and a third at the home office router. Each unit protects its appliance automatically.
Medical Equipment
GenBox 1200S includes true UPS functionality — the sub-20ms transfer is seamless for devices that require uninterrupted power. With base + 2 expansion modules, runtime extends to 18+ hours on a full charge.
Sump Pump Protection
Heavy storms knock out power precisely when your sump pump needs it most. GenBox 1200S with one expansion module provides 12+ hours of sump pump runtime — keeping your basement dry when it matters most.
What’s in the Box
- GenBox 1200S Slim unit (pre-charged to ~30%)
- AC charging cable
- Wall-mounting bracket and floor stand
- Installation hardware
- Quick-start guide and user manual
Expansion modules (GenBox-1.3B) and solar panels sold separately.
Warranty & Support
| 3-Year Limited Warranty Covers | Lifetime U.S.-Based Support For |
|---|---|
| Manufacturing defects | Installation questions |
| Battery capacity degradation within rated specifications | Troubleshooting |
| Electrical component failures | Optimization and expansion planning |
| BMS and inverter issues |
Call us at 704-360-9311 or message support directly from inside the Ionic GenBox app.
Technical Specifications
| Model | GENBOX-1200S |
| Dimensions (L×D×H) | 25.4 × 3.8 × 12.0 in (645 × 96 × 306 mm) |
| Weight | 33.0 lbs (15.0 kg) |
| Color | Black or White |
| Portability | Built-in lift handles |
| AC Output | 1,200W continuous · 1,350W peak · 120V 60Hz · Pure sine wave (single-phase L-N) |
| AC Outlets | 2 × 120V |
| UPS Transfer Time | <20 ms |
| AC Round-Trip Efficiency | ~90% |
| AC Input | 1,200W (L-N), 60Hz |
| DC Solar Input | Max 400W, 11–50V DC, MPPT |
| Battery Energy Capacity | 1,382Wh |
| Battery Chemistry | LiFePOâ‚„ |
| Cycle Life | 5,000 cycles to 70% SOC |
| Scalability | Up to 4 units total (base + 3 expansion modules) = 5.52kWh |
| Certifications | UL1642, UL1973-Cell, UN38.3, FCC |
| Ingress Protection | IP54 |
| Charging Temperature | 32°F to 122°F (0°C to 50°C) |
| Discharge Temperature | -4°F to 122°F (-20°C to 50°C) |
| Storage Temperature | 41°F to 95°F (5°C to 35°C) |
| Operating Humidity | 5%–90% |
| Operating Altitude | Up to 6,560 ft (2,000 m) |
| Warranty | 3-year limited factory warranty |
