When the grid goes down in a storm, heatwave or wildfire, you don't have time to book an electrician. A portable, plug-in battery is useful the afternoon it's delivered — charge it from the wall, roll it where you need it, and keep the things that matter on. No wiring, no fuel, no noise. Here's how to build a no-install blackout kit.
By the time the lights go out, a fixed battery is too late — it needs an electrician, a permit and often a panel upgrade you can't schedule mid-storm. A portable unit skips all of that:
| Portable LiFePO4 (PowerBox) | Petrol generator | |
|---|---|---|
| Indoor safe | Yes (fume-free) | No (CO risk) |
| Noise | Silent (≤75 dB fan only) | Loud |
| Fuel | None | Petrol, stored & queued |
| Start-up | Button / auto | Pull-start, refuel |
| Whole-house | Essentials via outlets | Can power more (outdoors) |
| Best for | Overnight, indoor, near-home | Days-long, outdoor, heavy loads |
For most households the battery is the primary blackout tool; a generator only earns its place for sustained, whole-house, outdoor use.
Prioritise loads by what an outage actually threatens:
| Priority | Load | Why it matters |
|---|---|---|
| 1 | Medical device (CPAP, oxygen) | Health & safety |
| 2 | Fridge / freezer | Food safety, cost of loss |
| 3 | Router + phone / laptop | Comms, work, emergency info |
| 4 | Lights | Safety, mobility |
| 5 | Small heater / fan / AC | Extreme weather |
| Model | Energy / Power | Essentials runtime* | At full rated load |
|---|---|---|---|
| PowerBox 4.02 kWh | 4.02 kWh / 500 W | 12–30+ h | ~7 h @ 500 W |
| PowerBox 8.04 kWh | 8.04 kWh / 1,000 W | 25–60+ h | ~7 h @ 1,000 W |
| PowerBox 16.08 kWh | 16.08 kWh / 1,500 W | 50–120+ h | ~10 h @ 1,500 W |
*Essentials ≈ 95 W average. Add solar panels and the unit recharges during the day for free — ideal for multi-day outages. Size exactly with the Home Battery Calculator.
| Spec | PowerBox |
|---|---|
| Capacity | 4.02 / 8.04 / 16.08 kWh |
| Power | 500 / 1,000 / 1,500 W |
| Charging | Wall / Solar / Generator |
| Chemistry | 314 Ah LiFePO4 (stable, safe) |
| Mobility | Wheeled (26 / 57 / 100 kg) |
| Noise | ≤75 dB(A), air-cooled |
| Certification | CE · UN38.3 · UL · IEC |
See the unit on the PowerBox product page.
A portable unit is also the only backup renters can use. See the apartment renter guide for sizing and landlord-friendly setup.
Read the apartment guide →A wheeled, plug-in LiFePO4 power station is the best no-install option for most homes. It needs no electrician and is ready the day it arrives — charge it from any wall socket, then run fridge, lights, router and medical devices off its outlets. NovaBESS PowerBox ships in 4 / 8 / 16 kWh (500 / 1000 / 1500 W) and is CE / UL certified.
For indoor or near-home use, a battery wins: silent, fume-free, no fuel to store or queue for, and safe to run overnight. A generator is louder, emits CO, needs fuel and can't run indoors. A generator only beats a battery for days-long, whole-house loads outdoors — and even then, many households pair both.
A 4 kWh unit runs fridge + lights + router + phone for 12-30+ hours; 8 kWh roughly doubles that; 16 kWh covers multi-day essentials and a small AC. Add solar panels and it recharges for free during extended outages. Size exactly with the Home Battery Calculator.
Yes — CPAP machines, oxygen concentrators and similar low-watt medical devices (typically 40-150 W) run comfortably on a portable LiFePO4 unit for many hours. Always keep the device's own backup battery as a final fallback, and confirm the unit's pure-sine-wave output matches the device before relying on it.
Specs and certification are from the NovaBESS manufacturer catalog; runtime figures are indicative 2026 estimates for planning. A portable unit powers appliances through its own outlets and must never be back-fed into a home panel (illegal and dangerous without a transfer switch). For medical reliance, keep the device's own backup and confirm pure-sine-wave compatibility. Confirm local rules and certification for your market.
Tell us the loads you must keep on and for how long — we'll match the right PowerBox and quote it with the certifications your market needs.
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