Hello everyone. It’s Rick and Carolyn here from Snow Gum, which is now called Night Owl and owned by our friend Tom.
This video provides a quick rundown on the second alternator system which Tom has installed. We looked closely at the high performance alternators and regulators available on the market in 2024 and identified what we think are the best items, to provide impressive levels of battery charging performance. Please feel free to ask for further information in the Comments.
Note: At 3:40 – rather than using the Cerbo’s Ethernet port, the VE.Can port is the one to use.
Equipment details are:
Alternator – Electromaax Genmaax 250A-12V Remote Rectified. Choose the 1&7/8 inch pulley to get a 2.5:1 ratio with the pulley in the Volvo bracket kit. https://electromaax.com/products/genmaax/
Regulator – Arco Zeus High Energy Bluetooth Alternator Regulator. https://arcomarine.com/products/arco-zeus-high-energy-alternator-regulator
Bracket Kit – Volvo Penta Extra Alternator Bracket Kit, part 21384685. Some items in the kit are not needed, but this is the least expensive way to get the bracket, tensioner arm, pulley, spacer & nuts and bolts that are needed.
Alternator belt – Gates K050405 (a.k.a. Goodyear K050405). This belt has an outside circumference of 1035mm, which is slightly shorter than the belt in the Volvo bracket kit, being 1067mm. This works with a Genmaax 250A alternator with the 1&7/8” pulley, in the upper position on a Volvo Penta D2-75 engine, using the 119.1mm pulley included in the Volvo bracket kit.
Dealer locations are available from the manufacturers’ websites provided above. For this installation suppliers were:
Alternator – https://marinesmartenergy.com/
Regulator – https://www.imarineusa.com/search.aspx?find=Arco+Zeus+High-Energy+Alternator+Regulator
Bracket Kit – https://www.parts4engines.com/volvo-penta-d2-55-and-d2-75-additional-alternator-mounting-kit/
I’ll add some performance numbers once Tom has the system dialed in. Early indications are that the output from the ElectroMaax Genmaax 250A alternator and the Arco Zeus regulator is very impressive indeed. Stand by for news on this.
Regards, Rick.