On this page
A cold night in a van parked off the grid is the moment a diesel heater earns its place, and a diesel heater set up comes down to heater size, fuel tank, power and controls. Pick a heater whose stated heating area covers your space, a tank that runs the hours you need, a voltage your rig can feed, and a controller within reach of bed. The steps below walk through each choice.
SolarKitHQ earns a commission when you buy through links on this page, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.
The quick answer
Match the heater to the space, the tank to the night, the voltage to the rig and the controls to where you sleep. A 2KW heater covers 108 to 161 square feet, an 8KW heater 215 to 269 square feet, per the VEVOR listings. A 10L tank runs up to 38 hours and an 8L tank up to 70 hours on the lowest setting, per the VEVOR and AFHCN listings. All the heaters here run on 12V; the AFHCN and RDXTIK also take 24V. Set the temperature from the app, the remote or the LCD, and check the altitude mode at height.
Step 1: Match the heater to the space
Heater size is the first choice, stated as a heating area. The VEVOR 2KW lists 108 to 161 square feet, and the VEVOR 8KW lists 215 to 269 square feet. The AFHCN and RDXTIK listings state no heating area, so compare them on output and tank: the AFHCN title says 12KW and the RDXTIK says 8KW. A heater too small runs flat out and still leaves cold corners, while one too large cycles on and off. If you are new to these heaters, read what a diesel heater is first.
Step 2: Size the fuel tank by the night
Tank size and runtime decide how often you refill. The VEVOR 2KW (on Amazon) lists a 10L tank with up to 38 hours of continuous heat, and the VEVOR 8KW a 5L tank with up to 8 hours. The AFHCN lists an 8L tank with up to 70 hours on the lowest setting, and the RDXTIK an 8L tank with up to 24 hours.
| Heater | Fuel tank | Runtime stated | Amazon |
|---|---|---|---|
| VEVOR 2KW | 10L | Up to 38 hours | |
| VEVOR 8KW | 5L | Up to 8 hours | |
| AFHCN 12KW | 8L | Up to 70 hours on the lowest setting | |
| RDXTIK 8KW | 8L | Up to 24 hours |
Fuel use per hour: 0.12 to 0.26 L for the VEVOR 2KW, 0.16 to 0.62 L for the VEVOR 8KW and 0.18 to 0.53 L for the AFHCN. The RDXTIK states two ranges, 0.18 to 0.53 and 0.16 to 0.62 L per hour, so plan on the wider range. The VEVOR 2KW listing says less than 1 gallon per night, the VEVOR 8KW around 1 gallon per night, and the RDXTIK about 1 gallon of fuel per night.
Step 3: Feed it the right voltage
Every heater here runs on 12V. The AFHCN also takes 110 and 24 volts, and the RDXTIK takes 12V, 24V and 110 to 240V through an included transformer, so it runs at home as well as on the road. Match the heater to the voltage you have and follow the manual for the power connection.
Step 4: Set the controls and the altitude mode
Controls decide how you run the heater from bed. Both VEVOR heaters offer Bluetooth app control up to 98 ft, a remote reaching 32 ft, and an LCD. The AFHCN adds a wireless remote doubling as an indoor thermostat, sensing the temperature where you sleep. The RDXTIK has an LCD switch and a remote control, with no app control stated. Both VEVOR heaters and the AFHCN adjust for altitude: the VEVOR listings state compensation to 18,045 feet, and the AFHCN states adjustment to 18,000 feet. Set the temperature from the stated range and let the altitude mode work when you camp high.
Where to put the unit
Placement is part of the set up and the listings disagree on it, so read the manual for your unit. The AFHCN listing says to place the heater outside the RV and run the 3-meter heat duct inside, keeping the unit out of the living space. The VEVOR 2KW listing names RVs, trailers, campers, vans, boats and indoor use; the VEVOR 8KW listing calls itself an all-in-one needing no installation, suiting outdoor adventures. The RDXTIK listing says the unit needs no installation either, and includes two extra bases, one rubber-bottomed and one metal-bottomed. A diesel heater burns fuel, so follow the manual on placement. For background, read how a diesel heater works in RVs and vans.
Diesel heater set up: the gear
The heaters below cover the choices above: size for Step 1, tank and runtime for Step 2, voltage for Step 3, and controls for Step 4.
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  RDXTIK 8KW Diesel Heater | 9.6/10 | Buy on Amazon |
| 2 |  VEVOR 2KW Diesel Heater | 9.6/10 | Buy on Amazon |
| 3 |  VEVOR 8KW Diesel Heater | 9.5/10 | Buy on Amazon |
| 4 |  AFHCN 12KW Diesel Heater | 9.4/10 | Buy on Amazon |
RDXTIK 8KW Diesel Heater
An 8KW all-in-one diesel heater with an 8L fuel tank, multi-voltage support and a muffler, rated for up to 24 hours.
Pros
- 8L fuel tank, up to 24 hours of continuous heating stated
- 12V, 24V and 110 to 240V support with a transformer included
- Overheat protection at 518 F stated, plus an anti-oil-leakage design
- 1 year warranty in the spec table
Cons
- Bullets state two fuel consumption ranges, 0.18 to 0.53 and 0.16 to 0.62 L per hour
- 17.72 by 15.75 by 13.78 inch body is the largest here
- No Bluetooth app control is stated
- Muffler listed but no noise figure stated
Detailed Review
RDXTIK lists this 8KW all-in-one diesel heater with an 8L fuel tank, an LCD switch, a remote control and a muffler, for 12V, 24V and 110 to 240V with a transformer included. The listing states 46.4 to 96.8 F, up to 24 hours of continuous heating, and overheat protection at 518 F. The bullets state two fuel consumption ranges, 0.18 to 0.53 and 0.16 to 0.62 L per hour, so plan on the wider range. The spec table gives 17.72 by 15.75 by 13.78 inches and a 1 year warranty.
Who it's for: RV and truck owners who want multi-voltage support, a muffler and 24 hours from an 8L tank. Who should skip it: anyone who wants app control, which this listing does not state.
Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 21/25, safety 5/10 and warranty 2/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Output | 8KW, 8000W |
|---|---|
| Fuel tank | 8L, up to 24 hours |
| Voltage | 12V, 24V, 110 to 240V |
| Controls | LCD switch, remote control |
Taken from the seller's listing on 13 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Overheat protection at 518 F stated, plus anti-oil-leakage design, so safety scores 5 of 10. 1 year warranty. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
VEVOR 2KW Diesel Heater
A 12V 2KW diesel air heater with a 10L fuel tank, Bluetooth app control, a remote and an LCD, for 108 to 161 square feet.
Pros
- 10L fuel tank, up to 38 hours of continuous heat stated
- Bluetooth app control up to 98 ft, plus a 32 ft remote and LCD
- Automatic altitude compensation to 18,045 feet stated
- Overheat protection at 270 C stated
Cons
- No warranty term is stated
- Heating area of 108 to 161 square feet is the smallest here
- Remote range of 32 ft is shorter than the 98 ft Bluetooth range
- No carry handle is stated for the 11.0 pound unit
Detailed Review
VEVOR lists this diesel air heater, a 12V 2KW unit with a 10L fuel tank, Bluetooth app control, a remote control and an LCD. The listing states 108 to 161 square feet, fuel use of 0.12 to 0.26 L per hour, up to 38 hours of continuous heat, and automatic altitude compensation to 18,045 feet. The temperature adjusts from 46 to 96.8 F, with overheat protection stated at 270 C. The spec table gives 13.4 by 4.5 by 5.5 inches and 11.0 pounds, with no warranty term stated.
Who it's for: van and camper owners who want a small diesel heater with app control and long runtime from a 10L tank. Who should skip it: anyone heating more than 161 square feet, or anyone who wants a stated warranty.
Its Solar Score of 9.6/10 comes from performance 30/35, build 21/25, value 21/25, safety 5/10 and warranty 0/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Output | 2KW, 12V |
|---|---|
| Fuel tank | 10L, up to 38 hours |
| Heating area | 108 to 161 square feet |
| Controls | Bluetooth app, remote, LCD |
Taken from the seller's listing on 13 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Overheat protection at 270 C stated, plus constant temperature control, so safety scores 5 of 10. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
VEVOR 8KW Diesel Heater
A 12V 8KW diesel heater with a 5L fuel tank, Bluetooth app control, a remote and an LCD, for 215 to 269 square feet.
Pros
- 8KW output, stated heating area of 215 to 269 square feet
- Bluetooth app control up to 98 ft, plus a 32 ft remote and LCD
- Automatic altitude compensation to 18,045 feet stated
- Overheat protection at 518 F stated
Cons
- 5L fuel tank gives up to 8 hours, the lowest runtime here
- No warranty term is stated
- Spec table lists a weight with many decimal places, a conversion artifact
- No muffler is stated, unlike the RDXTIK
Detailed Review
VEVOR lists this diesel heater, a 12V 8KW all-in-one unit with a 5L fuel tank, Bluetooth app control, a remote control and an LCD. The listing states 215 to 269 square feet, fuel use of 0.16 to 0.62 L per hour, up to 8 hours of continuous heat, and automatic altitude compensation to 18,045 feet. The temperature adjusts from 46.4 to 96.8 F, with overheat protection stated at 518 F. The spec table gives 15.7 by 9.8 by 12.2 inches and a weight figure with many decimal places, with no warranty term stated.
Who it's for: owners of larger RVs and trailers who want 8KW of heat with app control and can refill a 5L tank. Who should skip it: anyone who wants a full night's heat without refilling; the stated runtime is up to 8 hours.
Its Solar Score of 9.5/10 comes from performance 28/35, build 20/25, value 19/25, safety 5/10 and warranty 0/5: 72 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Output | 8KW, 12V |
|---|---|
| Fuel tank | 5L, up to 8 hours |
| Heating area | 215 to 269 square feet |
| Controls | Bluetooth app, remote, LCD |
Taken from the seller's listing on 13 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Overheat protection at 518 F stated, so safety scores 5 of 10. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
AFHCN 12KW Diesel Heater
A 12KW diesel air heater with an 8L fuel tank, app control and a wireless thermostat, up to 70 hours on the lowest setting.
Pros
- 8L fuel tank, up to 70 hours on the lowest setting stated
- Wireless remote doubles as an indoor thermostat
- 110, 12 and 24 volt support stated
- 1 year warranty in the spec table
Cons
- Title says 12KW while the bullets repeatedly call the unit 8KW
- Bullets claim 36 percent better diesel efficiency with no baseline stated
- Listing calls the 8L tank larger than most competitors' 8L, saying nothing
- No overheat protection figure is stated
Detailed Review
AFHCN lists this 12KW diesel air heater with an 8L fuel tank, app control and a wireless thermostat, for 110, 12 and 24 volts. The listing states 46 to 97 F, fuel use of 0.18 to 0.53 L per hour, up to 70 hours on the lowest setting, and altitude adjustment to 18,000 feet. The title says 12KW, but the bullets repeatedly call the unit an 8KW heater, and the listing claims 36 percent better diesel efficiency with no baseline stated. The spec table states a 1 year warranty.
Who it's for: campers who want a large tank, a wireless thermostat and multi-voltage support, despite the mixed kilowatt figures. Who should skip it: anyone who needs a single clear output figure before buying.
Its Solar Score of 9.4/10 comes from performance 26/35, build 20/25, value 20/25, safety 0/10 and warranty 2/5: 68 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Output | 12KW per title, 8KW per bullets |
|---|---|
| Fuel tank | 8L, up to 70 hours |
| Voltage | 110, 12 and 24V |
| Controls | App control, wireless thermostat |
Taken from the seller's listing on 13 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. No safety listing, protection or rating is stated, so safety scores zero. 1 year. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
FAQ: power away from the grid
What size diesel heater do I need for a van?
It depends on the space. The VEVOR 2KW lists 108 to 161 square feet, and the VEVOR 8KW lists 215 to 269 square feet. The AFHCN and RDXTIK listings state no heating area, so compare them on output and tank.
How long will a diesel heater run on one tank?
The VEVOR 2KW lists up to 38 hours from a 10L tank, the VEVOR 8KW up to 8 hours from a 5L tank. The AFHCN lists up to 70 hours from an 8L tank on the lowest setting, the RDXTIK up to 24 hours from an 8L tank.
Can a diesel heater run on 24 volts?
The AFHCN supports 110, 12 and 24 volts, and the RDXTIK lists 12V, 24V and 110 to 240V with a transformer included. Both VEVOR heaters list 12V only.
How do I control a diesel heater from inside?
Both VEVOR heaters offer Bluetooth app control up to 98 ft and a remote that reaches 32 ft, plus an LCD. The AFHCN adds a wireless remote that doubles as an indoor thermostat. The RDXTIK has an LCD switch and a remote control, with no app control stated.
Related solar guides
More: camping and emergency gear guides, diesel heater maintenance, diesel vs propane heaters and best portable power station for camping.
