The PowerMax High-Output Alternator should be the first item to consider when expanding or upgrading your charging system. The PowerMax delivers incredibly high output even at idle or low engine RPM.

In combination with our basic 2-step voltage regulator, or matched with a smart 3-step regulator, you can be sure that your PowerMax alternator represents one of the most efficient methods of charging your batteries. With 5-6 times more charging power than standard alternators, a PowerMax provides reduced engine running time which will save on fuel consumption, noise, heat, and main engine wear and tear.

NOTE: All Powermax Alternators (except the Powermax LTS) require the use of an external regulator (sold separately) to operate.




The new Powermax LTS alternator is a 100 amp high output, internally regulated alternator. These cost effective alternators are a perfect solution for Yanmar engines requiring MORE POWER than the stock engine alternator can provide, but do not need the charging capability of a Powermax that requires an external, smart regulator system to operate.


Fast, simple installation and plug in compatability with Yanmar marine engines, makes the PowerMax LTS a great choice for the weekend D-I-Y or anyone wanting an easy, cost effective power system upgrade.


A PowerMax high-output alternator driven from a main engine on a boat, RV or other vehicle can serve as your primary charging source, or as a powerful backup to renewable chargers. Either way, you will increase your power systems charging efficiency, dramatically. Choose the PowerMax that is right for your engine, then select the other components you will need for a professional installation. Or consider a Powermax packaged system.


  • Compatible with AGM, Wet & Gel batteries
  • Marine and USCG certified
  • Available with single or dual mounting foot
  • Available with single or dual pulley
  • A connection for electrical tachometers
  • A drop-in replacement for most alternators



All PowerMax Alternators Offer:


  • Faster charging
  • Less engine running
  • Incredible charging efficiency
  • Highest quality components & construction
  • Lowest cost overall  

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