Easy Inflatables · Viper
Easy Inflatables Viper 400 Sovereign Specs & Buyer Guide
Recommended power: 20–30 hp. Maximum rating: 40 hp.
Specifications
Easy Inflatables Viper 400 Sovereign Specifications
| Field | Value |
|---|---|
| Supplier | Easy Inflatables |
| Boat brand | Aerowave |
| Model family | Viper |
| Length overall | 4.00 m |
| Maximum power | 40 hp |
| Persons | 6 |
| Hull weight | 66 kg |
| Beam | 1.80 m |
| Tube diameter | 51 cm |
| Maximum load | 750 kg |
| Recommended power | 20–30 hp (not a maximum rating) |
| Construction | 1500 GSM / 1.2 mm German VALMEX Heavy Plus; thermo-welded seams |
| Market | Inflatable Catamaran Tenders |
| Type | Inflatable Catamaran Dinghy |
| Australian status | Australian market |
| Country of origin | Australia / International |
Supplier specification update · 2026-10-26
Specifications supplied by Easy Inflatables; recorded 26 October 2026. Weight is boat-only, not the complete operating package. A dash means no figure was recorded in this update; it does not mean zero. Recommended power is separate from maximum power, and payload is separate from passenger capacity.
One of 580 dinghies, tenders and RIBs in the BuyDinghy Australian database, scored against inflatable catamaran tenders rather than the market as a whole.
Where this model fits
At 4.00 m, this model sits at the larger end of the inflatable catamaran tenders. That helps define the comparison set, but storage, total package weight and local support still decide whether it belongs on a shortlist.
Its published maximum power is 40 hp; confirm the maximum engine weight and shaft length before treating that as an engine recommendation. The published capacity is 6 people, but real usable payload also has to include fuel, equipment and the conditions in which the boat will operate.
Before you request a quote
- Ask the seller to identify the exact Viper 400 Sovereign model year and included configuration in writing.
- Build a ready-to-use weight from the 66 kg published hull figure and the exact engine and equipment quoted.
- Request the complete delivered price, including unavoidable freight, preparation and registration costs.
- Confirm warranty and parts support for this exact model under Easy Inflatables's current Australian arrangement.
Fit scores
Each score is Easy Inflatables's editorial score for that job, scaled by how well a 4.00 m hull suits it. A superb manufacturer still makes boats that are wrong for your job — the curve is what says so. How this is calculated.
Estimated ready-to-use weight: about 228 kg
Published hull weight is 66 kg. Our estimate adds a typical four-stroke outboard at maximum rating, a full portable fuel tank, anchor, rode, safety gear and a lifting bridle. It is an estimate, not a specification — but it is far closer to what your davits will carry than the brochure figure. See the full calculation.
Rest of the Viper range
Compare every variant on the Easy Inflatables Viper range guide.
| Model | Length | Max power | Persons |
|---|---|---|---|
| Viper 330 | 3.30 m | — | — |
| Viper 365 Open Bow | 3.65 m | 40 hp | 6 |
| Viper 400 Open Bow | 4.00 m | — | 6 |
| Viper 430 Open Bow | 4.30 m | — | 7 |
| Viper 450 Open Bow | 4.50 m | — | 7 |
Cross-shop against
Other Inflatable Cats within 25 cm of this length.
| Model | Brand | Length | Max power |
|---|---|---|---|
| Island 4.0 Cat | Island Inflatables | 4.00 m | — |
| T380LX | Takacat | 3.80 m | — |
| T420LX | Takacat | 4.20 m | — |
| Discovery 400 | True Kit | 4.00 m | 20 hp |