Re: Shore - Generator Switch-over box on A54 #solution

Mohammad Shirloo

Hi Ruedi;


There are electrical schematics in the original AMEL operator’s manual in the Appendix section, that came with the yacht, that show how they are wired. Attached is the schematic for the K1-K2 switchover relays.


I believe K1 and K2 switch/relays make the selection of power source.  Power first  goes through K1 which selects the source between shore power and generator. I believe that generator has priority over shore power. Once this source is selected, it goes through K2, which selects between the output of K1 and the inverter, with the output of K1 having higher priority.


I am fairly certain that the priority is:


  1. Generator
  2. Shore power
  3. Inverter





Mohammad and Aty

B&B Kokomo

Amel 54 #099


From: <> On Behalf Of Rudolf Waldispuehl via
Sent: Wednesday, September 15, 2021 8:31 PM
Subject: [AmelYachtOwners] Shore - Generator Switch-over box on A54 #solution


Hello Amelian's


I tried to find out how the Shore/Generator Switchover Box in the Engine room of my Amel-54 is exactly working. I do have in addition a 2500W MV inverter installed originally from AMEL. Last few weeks the Switch-over is doing strange things and fuses are blowing. 


I have not found any accurate information (drawings) electric scheme of that AMEL specific switch-over mechanism. I don’t know how it detects either one or all 3 of the 240V sources, and which is the master over-ruling the Generator or Shore and/or Inverter. How it protects the Inverter when Shore or Generator is running, etc… 
Does anyone out there have any detailed information how these system works and may have an Electric scheme with in dept knowledge how it works?


Thanks a lot for investigation and best regards
Ruedi Waldispuehl

WASABI A54. #55

E-MAIL: mail@...

Join to automatically receive all group messages.