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My knowledge of the LN175 and Dolphin charger is limited, so I will not be of much help there. I can share with you our current approach for our charging and inversion plans, as we make the necessary upgrades, as equipment fails.
Our 2500W Mastervolt inverter failed at the end of the 2019 season. We would like to use the existing charger wiring in the engine room. We have replaced our inverter with a MV Mass Combi Ultra 24/3500. These inverter /chargers can charge
at 100A, provide 3500W 220V and have solar controllers built in. They can also be connected in series for additional charging and inversion output. We intend to have 2 in series, giving us 200A charging/7000 W inversion. We will still have our existing 40A
MV charger, for a total of 240A charging. I have not checked the existing 40A charging wiring size. It is possible to add a third combi Ultra for max of 300A charging and 10,500W of inversion. The Combi Ultra can also be programmed to limit the charge/inversion
output to match the wiring size. The plan is to be able to supply the entire 220V panel from the inverters.
We have not gone far down the design phase, as this is some time away for us. However, I like the small size (same appx footprint as the inverter we replaced) and light weight of combi/ultra. We should be able to fit 2 and possibly three
in the same footprint and location of the existing chargers. Minimal wiring and full integration, monitoring and control of the Lithium batteries, chargers, inverters and solar.
All of this is very preliminary. In the next 2-3 years that it will take for us to be ready to make the upgrade, I’m sure may thing have changed that will require changes to our basic design concept.
Mohammad and Aty
Amel 54 #099
On Behalf Of
Ian Fraser via groups.io
Friday, September 17, 2021 2:16 PM
Ian Fraser <keyproperties@...>
Re: [AmelYachtOwners] Shore - Generator Switch-over box on A54 #solution
Thank you for your insights on Lithium. We are in a similar situation and agree that Lithium is too early for us.
Will really appreciate your guidance on best solutions for changes to LN175 alternator (and Dolphin 100A Charger) when upgrading to 8AGM 105Ahr on AMEL54 #009.
On 17 Sep 2021, at 03:27, Mohammad Shirloo <mshirloo@...> wrote:
We are currently in the Med and, in my opinion, Lithium is not a huge advantage in our cruising style here. Also our AGMs that we installed in 2018, have been working better than expected and almost as good as when installed new.
I believe that Lithium technology for yachts is in its infancy and the improvement curve fairly steep. Our plan is to convert to Lithium in about 2-3 years, before leaving the Med, so we can benefit from all the advancement in technology
Thank you for the drawing which helped me a lot. Exactly this page was not in my documentation. Don’t know why?
I found in the 220V Panel drawing K1- and K2-source referenced, but without any detail about K1 and K2. Now everything is very clear and you are absolutely right with the priorities.
When there is Power from the Generator, K1 is interrupting the Shore supply and switching to Generator with the K1 Relay.
When there is any Power from any K1 source (GE or Shore), K2 is active and the Inverter is not switched because K2 is keeping the Inverter 220V output unswitched (offline).
Even if the inverter is ON, it can’t deliver 220V to the panel, because K2 is ON as long as K1 delivers power.
This sound a bit complicated but it’s finally the priority GEN, Sore, Inverter as you said.
BTW: What is your Lithium Project doing? You have changed KOKOMO to Lithium meanwhile?
Ruedi & Sabina Waldispuehl
Currently in Estepona heading to Gibraltar
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:
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