Solenoid drives systems are not supported by the NavPilot 300 by design. Solenoid drive requires three conductor SOL-A, SOL-B, and a common ground between them. The Navpilot 300 has two wire reversible output for driving a pump. While you might attempt to use it for what it isn't intended, it wouldn't be supported and bound to run into problems. The bottom line is it wasn't designed for Solenoid drive, Sailboats, Clutch drives and very large boats. The Navpilot 300 was designed for the small boat market centered around the center console market. The Navpilot 711c supports these other installs while offering both 0183 and 2000 support.