# Sunster 8 kW Toolbox Diesel Heater, Dual Power, App

Source: https://www.ranked10.co.uk/home/best-diesel-heaters/sunster-8kw-toolbox-diesel-heater
Ranked #8 in "Best Diesel Heaters 2026: 10 Ranked, and Why the kW Claims Don't Add Up": https://www.ranked10.co.uk/home/best-diesel-heaters

- Price: £105.99 (checked on Amazon UK on 2026-09-16)
- Amazon rating: 3.9 from 105 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0D63L6KZJ?tag=ranked10-21

The Sunster 8KW Toolbox Diesel Heater is number eight in our guide to diesel heaters. It costs £105.99 and carries 3.9 out of 5 from 105 ratings. It is the all-in-one shape: a sealed metal toolbox case with the fuel tank built in, a metal buckle lid and a sealed upper cover, and a dual input that takes either 12/24V DC or 110-240V AC and switches between them automatically, so it can run from a vehicle or from a mains socket. Sunster claims a 38% gain in combustion efficiency from a reinforced aluminium heat exchanger, full heat output up to 5,500 metres, and 3-5 minutes to feel the heat.

The 3.9-star average is doing a lot of hiding. The star breakdown on the page adds up to 100 rather than the 105 ratings quoted above it, and inside those 100, 64 are five-star against 19 one-star — more one-star ratings than four-star (9). The efficiency figure is the other number worth pausing on: this listing claims 38%, while Sunster's other 8 kW listing credits the same reinforced aluminium heat exchanger with 28%. One reviewer reports running the unit from a 300W power station at 123 watts of draw, on a heater sold as 8 kW. Everything below is taken from the Amazon listing and the ratings on it, not from testing by us.

## Specification

| Field | Value |
|---|---|
| Price | £105.99 |
| Rating | 3.9 out of 5 from 105 ratings |
| Claimed heat output | 8 kW (as listed) |
| Claimed combustion efficiency gain | 38% from a reinforced aluminium heat exchanger (as listed) |
| Power input | 12/24V DC and 110-240V AC, automatically switched |
| Claimed altitude ceiling | 5,500 m (as listed) |
| Package dimensions and weight | 46.79 x 38.2 x 32.1 cm; 9.88 kg |
| Best Sellers Rank | 2 in Car Ignition & Heating Systems |

## Questions people ask

**What exactly is the Sunster TB10 sold as?**

The Sunster 8KW Toolbox Diesel Heater, dual power 12/24V DC and 110-240V AC, model Sunster-TB10.

**How much does the Sunster TB10 cost?**

£105.99, with a rating of 3.9 out of 5 from 105 ratings.

**What efficiency gain does Sunster claim for the Sunster TB10?**

38%, credited to the reinforced aluminium heat exchanger, alongside a claim of 3-5 minutes to feel the heat.

**Can the Sunster TB10 be used at altitude?**

The listing says it auto-adjusts its combustion for full heat output and fuel economy up to 5,500 metres.

**What power sources does the Sunster TB10 accept?**

12/24V DC and 110-240V AC, switching automatically between vehicle and household supply.

**How big and how heavy is the Sunster TB10?**

The package is listed at 46.79 x 38.2 x 32.1 cm and 9.88 kg.