Sailboat hydrogenerator 7147

for cruising sailboatsfor boatsaluminum

Overview
Transom-mounted hydrogenerator system to produce onboard electricity while sailing. The SWI-TEC Hydro Charger combines water-driven generation and optional solar input to maintain battery charge on cruising and passagemaking yachts.

Videos and demonstrations

• Installation and operation videos available on the product page.

Charger / Converter

• Recommended total system power: 1000 W (recommended mix: hydrogenerator 600 W + PV 400 W).
• Compatible with 12 V / 24 V systems (automatic detection).
• Programmable voltage limits (e.g. 14.4 V / 28.8 V).
• Maximum charging current: 40 A (20 A at 24 V).
• Quiescent current: ≤ 45 mA.
• Default charge voltage: 12.44 V (adjustable).
• Battery full voltage programmable (example: 16 V / 32 V).
• Minimum disconnect voltage: 11 V / 22 V.
• Programmable charger-converter with digital display.
• Solar panel input up to 400 W / 16 A.
• 12 V user output for inverter (220 V / 50 Hz) to charge portable devices.
• Electronic overload/regeneration braking of the propeller programmable when batteries are full.

Generator

• Quiet operation, virtually inaudible in the water.
• Low minimum rpm requirement thanks to optimized gearing and transformation.
• High efficiency from special conversion and hydrodynamic profile.
• Clutch separates propeller from drivetrain: no transmission wear or propeller vibration.
• Sealing: two O-rings each side.
• Anodized aluminium housing with special plastic cover.
• Optimized aluminium profile; all fasteners in A4 stainless steel.
• Easy to disassemble for maintenance or repair.
• Starts charging from approximately 4 knots (depends on boat type and blade setting).

Propeller

• Main components in special engineering plastic.
• Aluminium blades fixed with hot lacquer.
• Pre-set pitch according to boat type and speed.
• Individual blades replaceable (e.g. after collision).
• MFN-calculated blade geometry for optimal shape and twist.

Electronic regulator

• Adjustable up to 16 / 32 V to compensate voltage drop.
• Integrated freewheel: propeller spins freely when max voltage reached.
• Additional input for solar panel or small wind generator.
• Direct-use connection (automatic engagement when charge sufficient).
• Features: digital display, optional freewheel switch, alarm for fully charged battery.

Transom mount and brackets

• Robust stainless steel construction (V4A / AISI 316 for key parts).
• Adjustable mount to match transom angle so the generator enters water vertically.
• Base plate and heavy-duty counterplate (also available separately).
• Locking system allows secure locking/unlocking of the support.
• Demultiplied lowering system for deployment and retrieval while sailing (e.g. 1:4 reduction, locking in the water).
• Generator locks in working position without load on the lifting line; can be released quickly by a secondary red line for retrieval or in case of collision.
• Side stops prevent contact with the hull; ergonomic shape.
• Mounting options: standard transom bracket, additional transom plate (approx. 260 x 70 x 30 mm, ~2 kg), platform mount (stainless steel, approx. 290 x 64 x 254 mm), pivoting bracket to keep unit perpendicular to the water.

Performance and dimensions

• Electrical output: approximately 50–600 W depending on boat speed and battery state of charge.
• Main unit (without bracket): 1100 x 100 mm; propeller diameter: 360 mm.
• Charger unit dimensions: 278 x 133 x 75 mm; charger weight: 1.6 kg.
• Complete system weight (generator, charger, propeller and main bracket): approx. 15 kg.
• Operating environment: ambient temperature 10°C to 50°C; relative humidity 0–90%.

Delivery contents

• Complete set: generator, charger, main transom bracket, connector, propeller and transom support.

Available accessories

• Set of 3 replacement blades.
• Platform mounting kit.
• Stern bracket dedicated model (Art. No. 7220).
• Additional brackets and accessories for adaptation and optimization.

Technical specifications / characteristics

• Compatible systems: 12 V / 24 V (automatic detection).
• Recommended total power (hydro + PV): 1000 W (hydro 600 W + PV 400 W).
• Produced power: ~50–600 W depending on speed.
• Maximum charge current: 40 A (20 A at 24 V).
• Quiescent current: ≤ 45 mA.
• Default charge voltage: 12.44 V (adjustable); battery full: 16 V / 32 V (adjustable).
• Minimum disconnect voltage: 11 V / 22 V.
• Main unit dimensions: 1100 x 100 mm; propeller diameter: 360 mm.
• Charger dimensions: 278 x 133 x 75 mm; charger weight: 1.6 kg; total weight: ~15 kg.
• Operating temperature (charger): 10°C–50°C; humidity: 0–90%.
• Article EAN (main model Art. 7147): 8436568322469.