Unlock a 10% discount by using the code SAVE10 at checkout.
🏷️Lowest Price Guaranteed! Found a better price? Contact us , we'll match it! 🏷️
Powered by Your Pleasure! Exceptional service. Hassle-free 90-day returns!
MPN: 83304002
No Minimum Purchase Required
100% hassle free
The Mastervolt Charge Mate Pro 40 Electronics Relay is a current limited electronic charge relay with high efficiency and reverse current protection. It is designed to provide a dedicated charging solution for a secondary battery on board.
The Charge Mate Pro effectively distributes the charger or alternator current between two battery banks, such as a starter and a service battery. It connects both batteries during charging and keeps them isolated when discharging, reducing the risk of a flat starter battery.
This charge relay offers an advantage over mechanical charge relays by limiting the charge current to the second battery. The primary battery, like a starter battery, is charged with priority. The return current is automatically blocked even when the secondary battery has a higher voltage. An emergency start function is possible by connecting an optional bypass switch to the Charge Master Pro.
An example of a marine application for the Charge Mate Pro is the connection of a bow thruster battery to a service battery. It ensures that the service battery is always charged with priority and blocks the return current from the bow thruster battery, guaranteeing that the bow battery remains charged. The current limiting feature also prevents power dips in the onboard electrical network.
The Charge Mate Pro series consists of a 40 Amp and a 90 Amp version, both suitable for charger or alternator applications.
For more information about charge relays, you can visit the Wikipedia page on charge relays.
To learn more about Mastervolt, the manufacturer of the Charge Mate Pro 40 Electronics Relay, you can visit their Wikipedia page.
Product: Mastervolt Charge Mate Pro 40 Electronics Relay - 83304002
Brand: Mastervolt
Model: 83304002
Shipping Weight: 2.20 lb
Shipping Height: 3.00 in
Shipping Width: 6.00 in
Shipping Length: 9.00 in
Need to make a return? Visit our Return Policy page for all the information and guidance you need to ensure a smooth and hassle-free process
Did you know we're not just about tech?
Visit our marine adventures on Atlantis Showroom!
Unlock a 5% discount on exclusive tech selections by signing up
At CE Showroom, we are dedicated to providing a seamless and secure online shopping experience, offering a wide range of top-quality products at competitive prices. Our commitment to exceptional customer service and satisfaction remains at the forefront of our values as we strive to become your go-to destination for all your electronics and home essentials needs.
Our friendly and dedicated staff is available to assist you during the following office hours:
Monday - Thursday: 8:00 AM - 5:00 PM PST
Friday: 8:00 AM - 2:00 PM PST
Should you require any help or have questions, feel free to reach out to us:
Phone: (800)-890-8166
Email: support@ceshowroom.com
Address
2000 Opportunity Drive
Suite 110 Roseville,
CA 95678 United States
Tel: 1-800-890-8166
Fax: 1-800-701-3129
support@ceshowroom.com

© 2026, CE Showroom