The Offshore Voyaging Reference Site

Choosing The Right Alternator, Part 2—Other Criteria

In Part 1 we took a deep dive into alternator efficiency and concluded that we have to be careful to separate attainable alternator efficiency from marketing hype.

So are we all done? Nope, there are two other criteria to consider when selecting an alternator, and then two other system issues to take into account before pulling out the credit card.

And if we are considering an alternator with very high output instead of a stand-alone generator, we need to, once again, evaluate rationally and separate marketing claims from reality.

Alternator Selection Criteria

Let’s start with the two more selection criteria:


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More Articles From Online Book: Electrical Systems For Cruising Boats:

  1. Why Most New-To-Us Boat Electrical Systems Must Be Rebuilt
  2. One Simple Law That Makes Electrical Systems Easy to Understand
  3. How Batteries Charge (Multiple Charging Sources Too)
  4. 5 Safety Tips For Working on Boat DC Electrical Systems
  5. 7 Checks To Stop Our DC Electrical System From Burning Our Boat
  6. Cruising Boat Electrical System Design, Part 1—Loads and Conservation
  7. Cruising Boat Electrical System Design, Part 2—Thinking About Systems
  8. Cruising Boat Electrical System Design, Part 3—Specifying Optimal Battery Bank Size
  9. Balancing Battery Bank and Solar Array Size
  10. The Danger of Voltage Drops From High Current (Amp) Loads
  11. Should Your Boat’s DC Electrical System Be 12 or 24 Volt?—Part 1
  12. Should Your Boat’s DC Electrical System Be 12 or 24 Volt?—Part 2
  13. Battery Bank Separation and Cross-Charging Best Practices
  14. Choosing & Installing Battery Switches
  15. Cross-Bank Battery Charging—Splitters and Relays
  16. Cross-Bank Battery Charging—DC/DC Chargers
  17. Choosing The Right Alternator, Part 1—Efficiency
  18. Choosing The Right Alternator, Part 2—Other Criteria
  19. Right Sizing an Alternator
  20. Making Large Alternators Safer With Whitespace Programming
  21. 18 Tips To Install A Cruiser’s Alternator
  22. Stupid Alternator Regulators Get Smarter…Finally
  23. Wakespeed WS500—Best Alternator Regulator for Lead Acid and Lithium Batteries
  24. AC Chargers For Lead Acid Batteries
  25. Efficient Generator-Based Electrical Systems For Yachts
  26. Replacing Diesel-Generated Electricity With Renewables, Part 1—Loads and Options
  27. Replacing Diesel-Generated Electricity With Renewables, Part 2—Case Studies
  28. A Simple Way to Decide Between Lithium or Lead-Acid Batteries for a Cruising Boat
  29. Eight Steps to Get Ready For Lithium Batteries
  30. Why Lithium Battery Load Dumps Matter
  31. 8 Tips To Prevent Lithium Battery Black Outs
  32. Building a Seamanlike Lithium Battery System
  33. Lithium Batteries Buyer’s Guide—BMS Requirements
  34. Lithium Batteries Buyer’s Guide—Balancing and Monitoring
  35. Lithium Batteries Buyer’s Guide—Current (Amps) Requirements and Optimal Voltage
  36. Lithium Battery Buyer’s Guide—Fusing
  37. Lithium Buyer’s Guide—Budget: High End System
  38. Lithium Buyer’s Guide—Budget: Economy Options
  39. 10 Reasons Why Hybrid Lithium Lead-Acid Systems are a Bad Idea
  40. 11 Steps To Better Lead Acid Battery Life
  41. How Hard Can We Charge Our Lead-Acid Batteries?
  42. How Lead Acid Batteries Get Wrecked and What To Do About It
  43. Equalizing Batteries, The Reality
  44. Renewable Power
  45. Wind Generators
  46. Solar Power
  47. Watt & Sea Hydrogenerator Buyer’s Guide—Cost Performance
  48. Battery Monitors, Part 1—Which Type Is Right For You?
  49. Battery Monitors, Part 2—Recommended Unit
  50. Battery Monitors, Part 3—Calibration and Use
  51. Battery Containment—Part 1
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Mark Hamstra

I count more than just two issues with 48v on a cruising boat: https://panbo.com/abyc-examines-the-48-volt-boat/