System at a Glance
This 1978 Custom is an electric Workboat / Utility from Homebuilt, powered by a 10 kW ePropulsion motor and a 20 kWh battery pack, offering a quiet and eco-friendly boating experience.
| Length (LOA) | 9 m (29.5 ft) |
| Beam (BOA) | 2.5 m (8.2 ft) |
| Hull Draft | 1 m (3.3 ft) |
| Hull Config | Monohull |
| Hull Type | Displacement |
| Displacement | 2,500 kg (5,512 lbs) |
Boat Specifications
Overview
- Make
- Homebuilt
- Model
- Custom
- Year
- 1978
- Hull type
- Displacement
- Configuration
- Monohull
Hull & Dimensions
- Length overall
- 9.00 m
- Beam overall
- 2.50 m
- Beam at waterline
- 2.50 m
- Draft
- 1.00 m
Weights
- Displacement
- 2,500 kg
- Motor & battery
- 243 kg
- Total weight
- 2,743 kg
Electric Propulsion System
Performance Tests
Test details
- Test date
- 2025-11-20 22:02:00
- Testing personnel
- Adam Wrightson
- Persons onboard
- 2 (total 80 kg)
- Location
- Auckland, New Zealand
- Temperature
- 16 °C
- Weather
- Fine , light winds
Recorded speed
Test results
Top Speed6.2 knots
Cruising5 knots
Estimated Range13–36 nm
| Power | Actual speed | Runtime* | Range* | Energy use |
|---|---|---|---|---|
| 2.5 kW | 4.4 knots | 8h 12m | 36.1 nm | 0.57 kWh/nm |
| 3 kW | 4.6 knots | 6h 50m | 31.4 nm | 0.65 kWh/nm |
| 4 kW | 5 knots | 5h 07m | 25.6 nm | 0.8 kWh/nm |
| 5 kW | 5.4 knots | 4h 06m | 22.1 nm | 0.93 kWh/nm |
| 6 kW | 5.6 knots | 3h 25m | 19.1 nm | 1.07 kWh/nm |
| 7 kW | 5.9 knots | 2h 56m | 17.3 nm | 1.19 kWh/nm |
| 8 kW | 5.9 knots | 2h 34m | 15.1 nm | 1.36 kWh/nm |
| 9 kW | 6.1 knots | 2h 17m | 13.9 nm | 1.48 kWh/nm |
| 10 kW | 6.2 knots | 2h 03m | 12.7 nm | 1.61 kWh/nm |
