Collection: Solar Water Heating System

Enjoying warm water for showering and dishwashing while anchored for an extended period can feel like a luxurious treat for sailors. At Custom Marine Products, we've developed a simple and convenient solution to bring this luxury to you: harnessing radiant energy from the sun to heat water.

Here's how it operates:

Solar panels absorb significant warmth on sunny days, with temperatures on the backside reaching 150°F or higher when tilted toward the sun. By attaching a heat exchanger (collector) to the back of a solar panel, we can capture radiant heat passing through. Water from the heater is circulated through this exchanger, gradually heating up inside the water heater, effectively turning it into a heat storage vessel. This circulation process is powered by a low-draw circulation pump designed for efficiency, minimizing electrical energy consumption. Interestingly, the circulating water also helps cool the solar panel, boosting its power generation efficiency. Under optimal sunlight conditions, our system can heat water to over 110°F, eliminating the need to run your engine solely for water heating while anchored.


Premium Marine Solar Panels/Systems and Lithium Iron Batteries

Improve your cruising experience with the highest efficiency solar panels available. 

  • Shipping

    Products ship day after payment domestically. International takes longer. We do not add tariff charges.

  • Custom Designs

    Our engineers will work with you to design a solar system specific to your needs including Lithium Batteries if you like. (Batteries are 10% off w/ solar system purchase).

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  • Doug Heath - Santa Fe, NM

    Customer Service and Product

    Very pleased with the performance of the rigid solar panels purchased in 2022. Customer service also has been consistently excellent both before the sale regarding product selection and after the sale regarding installation and maintenance concerns.

  • William Roth - Kodiak, AK

    Heavy Duty Panels For The Win

    Installed 1200watts of panels on my 56' commercial fishing boat in Kodiak Alaska, with salt spray and harsh winters I hardly run my genset. Installation was a breeze with using silicone to mount them. Most the boats in my family fleet have them now and we are all saving big on the fuel bill! Couldn't be happier with the purchace.

  • Hartwell C - Bellingham, WA

    Easy Install - Great Performance

    I worked with Tom last year to design a system for my sailboat; the dialog and information was very detailed and helpful in helping determine my system needs and completing the installation. Once ordering, the kit arrived in a timely manner and very complete. The install was very straightforward and Tom provided additional information as needed. After the install I took off on a 7 month cruise of British Columbia. The system worked perfectly during my trip. I’m very happy with the equipment and support from CMP and Tom. I highly recommend !

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