In the Panel Accessories product group, you will find the parts needed to install and connect a solar panel system: Pro Supply MC4 connectors for solar panels, Scanstrut Deckseal Horizontal double cable gland 5-6mm, Sunwind MC4 pliers for installing connectors, Sunwind PeakPower MPPT charge controller 10A, solar panel MC4 extension cable 5m, and Pro Supply MC4 splitter with one female and two male connectors.
What does it take to install a solar panel on a boat?
The MC4 connector is a standardized plug in the solar panel industry that allows panels, extension cables and controllers to be connected together safely and watertightly – the right MC4 pliers are essential to ensure that the connector is pressed into the cable reliably without leaving a weak contact. The charge controller (MPPT type, such as Sunwind PeakPower) is the brain of the system, adjusting the current coming from the panel to suit the battery and preventing the battery from overcharging – MPPT technology is more efficient than the older PWM technology because it utilizes the panel power better in varying light conditions. The Scanstrut deck feed-through allows the cable to be routed through the deck without water penetrating the interior. A splitter is necessary if several solar panels are installed on the boat in the same system for parallel connection. Always size the charge controller's amperage according to the total power of your panel system to avoid overloading the controller.
It is important to check the polarity (plus and minus) of the MC4 connectors during installation, as a wrongly connected connector can damage the charge controller or panel. It is advisable to choose a location for the charge controller that is protected from direct sunlight and moisture, as the electronics work most reliably in a cool and dry area, even if the panel itself is outdoors.
The length of the extension cable (5m) allows the panel to be placed further away from the charge controller, for example on the deck, while the controller itself remains protected indoors. Sunwind products are a popular, cost-effective choice for smaller and medium-sized solar power systems for boat use.
The compatibility of solar system components with the MC4 standard makes expansion and maintenance easy in the future.
The quality of the solar panel system accessories directly affects the reliability of the entire system – a cheap or incorrectly installed MC4 connector can cause power loss or even a safety risk in the long term. Scanstrut's deck feed-through is designed specifically for marine use and can withstand repeated exposure to salt water and UV radiation without becoming brittle.
Regular inspection of the system, especially the tightness of the connections, ensures reliable operation throughout the sailing season.
A well-designed and properly sized solar energy system can significantly reduce the need to go to port to charge batteries on longer trips.