Electric propulsion is no longer an experiment. Offshore-capable systems from Torqeedo, Oceanvolt, and others are in serious ocean passage use. Solar energy budgets that once required compromise now run full liveaboard loads in the tropics. These guides cut through the marketing and give you the numbers, the tradeoffs, and the real-world experience from cruisers who have made these systems work.
Electric Inboard Motors for Sailboats
The case for going electric under sail — Torqeedo, Oceanvolt, ePropulsion, and Bellmarine compared, motor sizing by displacement, shaft vs. saildrive, and the range anxiety reality.
- 50–100kW offshore-capable systems
- Regeneration via folding prop
- 4–6 hours motoring range
Battery Systems for Electric Propulsion
LiFePO4 as the only viable chemistry, bank sizing for offshore vs. coastal use, BMS requirements, installation location, and the real cost of a full electric drivetrain on a 40–45ft boat.
- 20–100kWh depending on range goals
- $50,000–$150,000 full installation
- LiFePO4 only — NMC too risky
Going 100% Solar on a Cruising Sailboat
The math behind energy independence, bimini and hardtop mounting, shading analysis, flexible vs. rigid panels, pairing with a wind generator, and real-world liveaboard solar case studies.
- 400W solar = 100–200Ah/day tropics
- Flexible panels degrade faster
- Wind fills the night-time gap
Sustainable Cruising Practices
MARPOL waste rules, grey water management, composting heads, copper-free antifouling, eco-anchoring to protect seagrass, sustainable provisioning, and the growing eco-sailing community.
- MARPOL offshore discharge zones
- Air Head & Nature's Head composting
- Copper-free bottom paint options
About These Guides
These are editorial resources based on publicly available technical specifications, cruiser accounts, and manufacturer documentation. Electric marine technology evolves quickly — verify current product specs and pricing with manufacturers before making purchasing decisions. Regulations on waste discharge and antifouling chemicals vary by jurisdiction; always confirm current rules with local port authorities. Browse the marina directory for facilities with shore power and electric charging infrastructure.