Ninja Double Stack XL SL400UK 9.5L Air Fryer

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Product guide

Ninja Double Stack XL SL400UK 9.5L Air Fryer

SL400UK: The Ninja Double Stack XL is a 9.5-litre air fryer with two independent drawers and six cooking functions. Its stacked layout provides four cooking levels with the included racks, while the two drawers can be used with Sync and Match functions.

At a glance

Two drawers and two racks provide four cooking levels in a stacked design.
Six functions cover Max Crisp, Air Fry, Roast, Bake, Reheat and Dehydrate.
The two drawers have independent cooking zones, with Sync and Match functions listed.
The listing claims capacity for up to eight portions and a space-saving design compared with the AF400. These are manufacturer claims, not independent measurements.

Price

£179.00Save 34%

Reference price: ~~£269.99~~

Price checked: 12 Nov 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

100PCS Ninja Double Stack XL 9.5L Air Fryer Liners, Dual Air Fryer Paper Liners for Ninja SL400UK, AF400UK, AF300UK, DZ400UK, Air Fryer Liners Disposable for Ninja, Keplin, Tower, Other Dual Airfryer

£9.89

BYKITCHEN Silicone Liners for Ninja Double Stack SL400UK, 2 Count | 2 Perforated Gray Silicone Air Fryer Liners,Fit for Ninja Double Stack XL SL400UK 9.5L, Air Fryer Accessories

£7.99

Pros and cons

Pros

The 9.5-litre capacity and two drawers suit preparing food for a larger household or cooking different items separately.
The supplied racks add two cooking levels above the drawers, allowing more food to be arranged within the stacked design.
Dishwasher-safe parts and non-stick coating may make routine clean-up easier.

Cons

At 10.3kg, it is a substantial appliance to move around or store away between uses.

Technical specifications

16 specifications

Identity
Brand	Ninja
Model	Ninja Double Stack XL

Capacity and cooking
Capacity	9.5 litres
Cooking functions	Max Crisp, Air Fry, Roast, Reheat, Dehydrate, Bake
Cooking zones	2 independent cooking zones
Temperature range listed	80 Degrees Celsius to 190 Degrees Celsius
Air frying technology	Rapid Air Circulation

Power and controls
Wattage	2470 watts
Output wattage also listed	1500 Watts
Voltage	240 Volts
Control method	Touch

Dimensions and installation
Dimensions listed	47D x 28W x 38.5H centimetres
Weight listed	10.3 Kilograms

Materials and care
Material listed	Aluminium, Plastic
Non-stick coating	Yes

Appearance
Colour	Grey

What to know before buying

Listing details to confirm

The listing gives two different power figures, 2470 watts and 1500 Watts, so confirm which applies to this model. It also separately lists a maximum setting of 190 Degrees Celsius and a feature claim of cooking up to 55% faster than fan ovens based on fish fingers and sausages. The speed and energy-saving percentages are test-specific manufacturer claims, not general guarantees.

Who is it for?

A good fit for

Households wanting a large-capacity air fryer with two separate drawers and rack-based cooking levels.
Buyers with limited counter width who prefer a stacked layout, provided the listed 47D x 28W x 38.5H centimetres dimensions fit their space.
People who want air frying alongside roasting, baking, reheating, dehydrating and Max Crisp functions.

Less suited to

Buyers who need a lightweight appliance for frequent lifting or compact storage.
Shoppers who need one definitive power rating before choosing, as two wattage figures are listed.

Ninja Double Stack XL SL400UK 9.5L Air Fryer · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 1,297 ratings

5 stars83%83%
4 stars10%10%
3 stars2%2%
2 stars1%1%
1 star4%4%

Customer feedback describes the appliance as space-saving for its capacity, useful for larger households and easy to clean, with reports of reliable performance. Cooking results and value are mixed, including reports of uneven cooking alongside praise for how it cooks. For buyers using both drawers and racks, those differing cooking experiences matter when planning meals across multiple levels. The overall rating distribution is mostly five-star but includes a smaller spread of low ratings, which does not establish why customers rated it that way.

Positive themes

Customers describe it as space-saving and suitable for larger households.
Customers mention ease of cleaning and reliable performance.

Mixed feedback

Cooking performance receives mixed feedback, including reports of uneven cooking.
Value for money is also assessed differently by customers.

Frequently asked questions

How many cooking functions does the Ninja Double Stack XL have?

The listing names six: Max Crisp, Air Fry, Roast, Bake, Reheat and Dehydrate.

Can the drawers cook independently?

The product details specify two independent cooking zones. The listing also names Sync and Match functions across the two drawers.

What comes with the air fryer?

The listing claims a UK-plug air fryer, two 4.75L drawers, two non-stick crisper plates and two racks. Confirm the selected listing's package details before ordering.

Are the parts dishwasher safe?

The listing says the parts are dishwasher safe and specifies a non-stick coating.