296Wh
battery capacity
300W
continuous output
3.5kg
to carry
3,000+
charge cycles
BP300
Small enough to grab. Big enough to matter.
The BP300 is the one you keep by the door. It charges phones, cameras and laptops, runs LED lights and a router, and keeps a 12V cool box going, all without a sound.
Take it camping, fishing or down the allotment, or keep it charged in a cupboard for when the power goes. Its LiFePO4 battery is rated for over 3,000 cycles, so it’ll keep going long after a cheaper pack has faded.
Who it’s for
Little pack, lots of jobs.
Camping and festivals
A weekend of phones, lights and music.
One charge covers a group’s phones for the weekend, a string of LED lights every evening and a speaker round the fire.
At 3.5kg it goes wherever the tent does.
Power cuts
Stay online when the lights go out.
Plug in the router and fibre box and you’ll stay connected for the best part of a day. Often that’s all you need to keep working, keep in touch and keep the kids happy.
Keep it charged in a cupboard and it’s ready the moment you need it.
Days out
Fishing, the allotment and the beach.
Charge a camera, run a small fan or keep the cool box cold. It’s the easy way to add a socket to anywhere you can carry a bag.
What will it run?
Approximate runtime on a full charge. We work it out as 296Wh × 85% ÷ the appliance’s watts. The 85% allows for inverter losses, so these are realistic figures, not best-case ones.
Anything over 300W, like a kettle or a hair dryer, is too much for the BP300. Need more? The BP600 doubles the output and the BP1500 runs a microwave.
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 display: shows the charge left and what’s going in and out at a glance.
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 BP300 included.
Lifespan
3,000+ 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
- 296Wh
- Chemistry
- LiFePO4
- Cycle life
- 3,000+ cycles
- AC output
- 300W continuous, 600W surge, pure sine wave
- DC outputs
- USB-A, USB-C, 12V car socket
- Solar charging
- Yes
- Fast charging
- Yes
- Display and app
- Built-in display, basic app control
- Weight
- 3.5kg
- Portability
- Highly portable, one-hand carry
- Expandable
- No
Questions
Will it run my CPAP overnight?
Most CPAP machines draw around 40W without the humidifier, so a full BP300 gives about six hours. The humidifier uses a lot more. Check your machine’s rating, or ask us and we’ll help.
Can I charge it with solar panels?
Yes. Ask us which panels suit it and we’ll make sure they match the input.
Can I take it on a plane?
No. Airlines don’t allow lithium batteries over 160Wh on passenger flights, and the BP300 is 296Wh.
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.
Is it safe for laptops and TVs?
Yes. The output is pure sine wave, the same clean power as a mains socket, so it’s safe for laptops, TVs and other sensitive electronics.
How should I store it?
Somewhere dry between 0°C and 25°C, at around half charge, and top it up every few months. LiFePO4 cells won’t charge below freezing, so bring it in from a cold van or shed before charging.
Delivery and returns
Shipped from our UK warehouse.
The BP300 goes out from our UK warehouse by standard tracked courier. 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.
