Brands & Models / Sunreef / 70 Power Eco-Option
Sunreef 70 Power Eco-Option Review: Electric Catamaran with 3,000 Sq Ft of Space
Silent hybrid propulsion meets 72 feet of voluminous catamaran layout. Solar-powered autonomy, transatlantic range options, and fully custom interiors for owners who prioritize efficiency over speed.
The Essentials
| Feature | Specifications | |
|---|---|---|
| Overall Length | 72 ft 2 in | |
| Beam | 37 ft 3 in–37 ft 9 in | |
| Draft | About 8 ft 2–3 in at full load | |
| Displacement (Unladen) | Not fully published; described as a voluminous composite cruising power cat with 3,000+ sq ft of living area and substantial tankage, plus Eco features like a large battery bank and solar skin | |
| Engines | Diesel: twin 300–850 hp diesels (2 × 300 hp to 2 × 850 hp MAN or CAT); Eco: twin electric motors (power level not fully disclosed) with Sunreef Solar Skin 3.0, ultralight batteries, and range-extender generators | |
| Fuel Capacity | Eco spec: 4,000–8,000 L; Yachts Croatia tests: up to 8,000–12,000 L depending on tank options | |
| Water Capacity | 1,600 L (about 423 US gal) | |
| Cabins / Heads | Fully custom; typical layouts 4–6 guest cabins (8–12 guests) plus 3–4 crew; Eco/AmberOne/Sea Bass examples show 4–5 guest cabins and up to 11–12 berths with all guest cabins en‑suite | |
| Max Speed | Diesel: 19–20 knots with twin 850 hp MANs; Eco: electric/hybrid speeds not publicly quoted | |
| Cruise Speed | Diesel: ~9.5–12 knots; Eco: similar mid-single- to low-double-digit speeds with solar/battery support |
Source: Spec & Photo Credit courtesy of Sunreef Yachts.
“
Sunreef has been building custom catamarans long enough to know what works at this size. The 70 Power Eco is not a concept boat. It’s a production platform with over 20 hulls delivered since 2021, and the build quality reflects a yard that understands composite construction and systems integration. The Solar Skin 3.0 is embedded in the composite, not bolted on top, which matters for both performance and longevity. The battery technology is proprietary and ultralight, which means it doesn’t eat into interior volume the way retrofitted lithium banks often do. This is a serious boat, not a marketing exercise.
This boat is for the owner who plans to use it heavily and values operational flexibility over outright speed. If you’re doing Bahamas seasons, Mediterranean summers, and you want the ability to anchor in marine reserves without running generators, the Eco version makes sense. If you’re covering long distances regularly or you need to keep pace with faster boats in your fleet, the diesel version is the better choice. The Eco system requires engagement. You need to understand state of charge, solar input, and generator management. If that sounds like work rather than interest, this is not your boat.
The resale market for electric catamarans is still forming, which means early buyers are taking some risk. But Sunreef’s reputation is strong, and the yard has been around long enough to support boats long-term. Used 70 Power diesels from the first generation are trading in the €2 million range. Second-generation models with newer systems are listed closer to €7 million. The Eco version will likely hold value better than standard diesels as fuel costs rise and environmental regulations tighten, but that’s a five-to-ten-year bet, not a two-year flip. Maintenance costs on the electric system are lower than twin diesels, but battery replacement is a future expense that needs to be factored in. If you’re planning to keep the boat and use it, the economics work. If you’re planning to trade up in three years, the diesel version is safer.”
Our Take
The Strategic View
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