The Remoran Wave 3GS starts charging at 3 knots of boat speed, and each Wave 3 model covers its working range with a single three-blade turbine. Mounted on the transom, it feeds a 300 W charger that delivers up to 25 A at 12 V — battery charging under sail, with no fuel and no engine hours.
Watt & Sea's Cruising range is the nearest alternative, and the comparison below uses each maker's published figures. On configuration, handling, and price, those figures favour the Remoran.
One turbine across the range
The Wave 3 comes in two versions: the 3GS, with a maximum operating speed of 12 knots, and the 3GD, with a maximum of 20 knots. Each runs a Ø24 cm three-blade turbine across its whole band, so there are no propeller sizes to choose at purchase or swap at sea.
Pick the model for the boat's sailing speeds — the 3GS up to 12 knots, the 3GD up to 20 — and the turbine question is settled.
On a rail: slide, lift, or take it inside
The Wave 3 slides onto a short rail bolted to the transom, and its telescopic leg sets immersion depth in 10 cm steps across the 68–98 cm range. Mounting angle adjusts from 0° to 40° in 5° steps, and the head swims 20° to either side.
The optional EasyLift raises and lowers the unit from the deck at speeds below 10 knots, so it retracts clear of the water without reaching down the transom.
And the unit simply lifts off the rail, with the leg retracted to its shortest — the whole hydrogenerator stowed below in harbour or over winter, with only the rail left on the transom.
Light hardware at both ends of the cable
The outboard unit weighs 7.5 kg and the charger 620 g. The charger auto-detects 12 V or 24 V systems, works with lead-acid, AGM, and lithium banks, and draws 20 mA on standby.
Charge data is available to view in the Remoran app over Bluetooth, and the warranty is two years.
Proven offshore
"We've done 31,000 miles without touching it — apart from once clearing some polyprop from the propeller." That is Mike Hutchinson on the Wave 3GS that has powered Distraction around the world.
A Wave 3GS with EasyLift is also aboard Gunnar Christensen's Golden Globe Race 2026 entry — solo, non-stop, around the world, with AYS supporting the campaign.
Remoran and Watt & Sea, side by side
Watt & Sea publishes the following figures for its Cruising 300 and Cruising 600; here is how they sit against the Wave 3 range.
| Remoran Wave 3GS / 3GD | Watt & Sea Cruising 300 / 600 | |
|---|---|---|
| Maximum output | 300 W | 300 W or 600 W |
| Speed coverage | 3GS to 12 knots, 3GD to 20 knots, one turbine each | 11 knots with the standard 240 mm propeller, 13 knots with the optional 200 mm |
| Propeller / turbine | One Ø24 cm three-blade turbine | 240 mm standard; 200 mm and 280 mm optional |
| Leg | Telescopic, 68–98 cm in 10 cm steps | Fixed, 610 mm or 970 mm, chosen at purchase |
| Mounting | Slide-on rail; unit lifts off, leg retracts for stowage below | Transom bracket; removable mounting kit sold separately |
| Transom angle | Adjustable 0–40° in 5° steps | Universal support bracket available separately |
| Weight, outboard unit | 7.5 kg | 7.05 kg or 8.0 kg (300), 8.1 kg or 9.05 kg (600), depending on leg length |
| Charger / converter | 620 g | 1.4 kg |
| Warranty | 2 years | 2 years |
| Price, at time of writing | £2,270.00 excl. VAT — £2,724.00 inc. VAT (3GS or 3GD) | £3,691.00 at Rowlands Marine (300) and £4,992.28 at Fox's Chandlery (600), both inc. VAT |
Watt & Sea's case is output headroom: the Cruising 600 reaches 600 W — Watt & Sea recommends it for boats over 35 feet — and its converter takes a solar panel input and offers a 48 V option.
Everything else a cruising owner handles sits with the Remoran: one turbine instead of three propeller options, a telescopic leg instead of a fixed leg length, a rail the unit slides off for stowage, a 620 g charger against a 1.4 kg converter, and a lower list price for either model at the time of writing.
The short version
Charging from 3 knots on the 3GS, one turbine per model, a rail it slides off to stow below, and £2,270.00 excl. VAT (£2,724.00 inc. VAT) at the time of writing: the Wave 3 settles its configuration at the design stage rather than on the options list — at the lower price.
Related reading: Marine Hydrogenerators: How Charging Under Sail Works and How to Choose
Advance Yacht Systems is the official UK & Ireland distributor for Remoran. The Wave 3GS and 3GD are available now in our hydrogenerator collection, with accessories and parts alongside.