Watt&Sea Cruising 300 + CV-03 Converter (12 V) wiring diagram

This entry combines the H-300-03 Cruising 300 hydrogenerator with its required CV-03 converter, configured for 12 V batteries. The generator's 300 W nameplate and the converter's 600 W / 44 A capacity describe different parts. Water speed and propeller conditions determine generation; the planner does not report 44 A as the output of this 300 W turbine. See 300 W and converter specifications, PDF p. 22 (printed p. 56).

The generator connects to the converter through its three-phase cable. For runs under 10 m the manual calls for 3 × 1.5 mm², increasing to 3 × 2.5 mm² for longer runs. Follow the connector drawing: the indicated GND position on the green generator connector is not used. The battery-side drawing provides two isolated positive outputs and one common battery-negative connection; connected banks must have matching voltage and battery type. See generator cable, PDF p. 14 and battery outputs, PDF p. 16.

Protect each connected bank with a 50 A fuse and use the prescribed 10 mm² battery positive and negative conductors, locating the converter within 2 m of the batteries. These requirements reflect the converter installation; a smaller apparent generator output does not justify silently substituting another fuse. Mount the converter dry with the manual's cooling clearance and accessible connections.

Check the configured charge voltages against the batteries before deployment, especially for lithium and its BMS disconnect behavior. Verify the mechanically secure mount and unobstructed deployment/retrieval before testing in water. Measure charging at known boat speeds; lifting the generator removes its water input. The optional solar input is limited to 50 V and 14 A, and hydro has priority, so its capacity cannot simply be added to hydro generation. The manual's operating and charge-configuration instructions begin at operation, PDF p. 18.