What’s the cost estimate for a marine solar installation?

System Components and Cost Estimate

A typical marine solar installation consists of flexible solar panels, a charge controller, a battery bank, a wiring system, and a monitoring system. The cost of these components can vary widely depending on the quality, size, and brand. For a basic system with a 200-watt flexible panel, a 20-amp charge controller, and a 100Ah battery bank, the total cost can range from $5,000 to $10,000.

Considerations for a Salt Environment

When designing a solar installation for a marine vessel, it’s essential to consider the harsh salt environment. Flexible solar panels are a good choice as they can withstand the corrosion and expansion/contraction caused by the salt. However, the wiring system and other components must also be designed to withstand the salt environment. A good rule of thumb is to use marine-grade components and to ensure that all connections are sealed and protected from the elements.

System Sizing and Performance

To determine the cost estimate for a marine solar installation, it’s essential to size the system correctly. The system should be sized to meet the daily energy requirements of the vessel, taking into account the amount of energy used by the boat’s appliances, lights, and other systems. A good rule of thumb is to use a system that produces at least 10-20% more energy than the daily energy requirements to account for loss due to the charge controller, wiring, and other inefficiencies. For example, a 1,000-watt system might be required to meet the daily energy requirements of a small sailboat, but a 1,200-watt system would be a better choice to account for losses and ensure reliable performance.