6,144Wh
battery capacity
4,200W
continuous output
8,400W
surge
4,000+
charge cycles
T4 Wave
When the power goes, the house carries on.
The T4 Wave is our biggest power station, built to keep a home running rather than just a few gadgets. 6,144Wh of storage keeps the fridge-freezer, Wi-Fi, lights and TV going for days, and 4,200W of output handles the kettle, the microwave or an electric oven while it does.
It rolls on wheels with a telescopic handle, so 63kg is easy to move, and it’s built for the long haul: over 4,000 charge cycles, a 10 to 15 year design life and up to 80% recyclable components.
Who it’s for
Built for the whole house.
Home backup
Days of essentials, not hours.
A fridge-freezer, router, a few lights and phone charging use around 150W between them. A full T4 runs that lot for about a day and a half, and much longer if you’re careful.
Fitted with a changeover switch by a qualified electrician, it can feed selected circuits directly, so there’s no tangle of extension leads round the house.
Working from home
A power cut doesn’t have to mean a lost day.
Laptop, monitor, router and a desk lamp keep going for days, not hours. Pure sine wave output means your kit gets clean, mains-quality power.
If you rely on powered medical equipment such as a CPAP machine, the T4 can run it for well over a week of nights. Talk to your equipment supplier too, so you know exactly what it needs.
Off-grid and solar
The battery for a garden office or cabin.
Pair it with solar panels and it becomes the battery for a garden office, a workshop or a cabin with no mains supply.
It’s modular, so you can add battery packs as your needs grow. Ask us which panels and how many suit your setup.
What will it run?
Approximate runtime on a full charge. We work it out as 6,144Wh × 85% ÷ the appliance’s watts. The 85% allows for inverter losses, so these are realistic figures, not best-case ones.
Anything up to 4,200W continuous will run. Very large loads, like an electric shower at 8–10kW, are too much. Running a gas boiler needs a changeover switch fitted by an electrician.
Recharging
Mains or solar. Your choice.
Mains: fast charging from any standard UK socket.
Solar: plug in solar panels and top up for free, wherever you are. Ask us which panels suit it and we’ll make sure they match the input.
The app: check the charge and see what’s drawing power from your phone.
Battery safety
LiFePO4, the same chemistry as home batteries.
Lithium iron phosphate is far more thermally stable than the NMC lithium-ion found in phones and older power stations, and it lasts many more cycles. That’s why every pack in our range uses it, the T4 Wave included.
Lifespan
4,000+ full cycles.
Charged and emptied twice a week, that’s decades of cycling. In practice, calendar age and storage set the limit long before the cycle count does, so look after it and it’ll look after you.
Compare the range
Every pack is LiFePO4 with pure sine wave output. Swipe the table on a phone.
| BP300 | BP600 | BP1500 | BP2400 | T4 Wave | |
|---|---|---|---|---|---|
| Capacity | 296Wh | 614Wh | 1,536Wh | 2,560Wh | 6,144Wh |
| Output | 300W | 600W | 1,500W | 2,400W | 4,200W |
| Surge | 600W | 1,200W | 3,000W | 4,800W | 8,400W |
| Weight | 3.5kg | 7kg | 16kg | 26kg | 63kg, on wheels |
| Best for | Camping, phones, power-cut basics | Weekends away, laptops, stalls | Campervans, power cuts, DIY | Home backup, trades, events | Whole-home backup, business |
Specification
- Battery capacity
- 6,144Wh
- Chemistry
- LiFePO4
- Cycle life
- 4,000+ cycles
- AC output
- 4,200W continuous, 8,400W surge, pure sine wave
- DC outputs
- Multiple USB-A and USB-C, 12V car socket, DC5521
- EV
- EV charger adaptor
- Solar charging
- Yes
- Fast charging
- Yes
- App control
- Yes
- Weight
- 63kg
- Portability
- Wheels and telescopic handle
- Expandable
- Yes, with extra battery packs
- Design life
- 10–15 years
- Recyclability
- Up to 80% of components
Questions
Can it power my whole house?
It runs the essentials and most big appliances, one or two at a time, up to 4,200W. To feed your house circuits you need a changeover switch fitted by a qualified electrician. Very large loads like electric showers are too much.
How long will it keep the fridge going?
A typical fridge-freezer averages around 60W, so a full T4 runs it for about three and a half days on its own.
How do I move it?
It has wheels and a telescopic handle, like a heavy suitcase. At 63kg you’ll want two people for steps or lifting it into a vehicle.
Can I add more capacity?
Yes. The T4 is modular and takes extra battery packs. Ask us how much backup you want and we’ll work out the right setup.
Can I charge it with solar panels?
Yes. Ask us which panels and how many suit your roof or garden, and we’ll make sure they match the input.
Can I use it indoors?
Yes. There’s no combustion, so there are no fumes and no carbon monoxide. Keep the vents clear and don’t cover it while it’s running.
How should I store it?
Somewhere dry between 0°C and 25°C. If it’s not in daily use, keep it around half charged and top it up every few months.
T4 Wave for business
Already powering mobile bars, music stages and DJ booths.
Running events, hospitality or anything on the move? See how businesses use the T4 Wave instead of a generator.
Delivery and returns
Shipped from our UK warehouse.
Because of the size of its lithium battery, the T4 Wave travels by a specialist carrier. Returns are accepted within 14 days.
Support
A UK company you can phone.
Sleemans has supplied engines, generators and parts for nearly 70 years. Talk to us on 01626 778 266 or sales@sleemans.com.
