Looking for a long range expedition aluminum power catamaran design

Where I live we get a lot of cruising sailors coming through every year and this year I saw something interesting that might be suitable. It was an older gent with his somewhat younger wife cruising in a production 55 ish foot catamaran but with a cut-down rig, so much so that I initially thought it was a jury rig. I heard the story that they don't feel competent handling full sized sails for that size of boat but still wanted the ability to put out some sail area on easy downwind legs. This makes a lot of sense for economy, redundancy, using the mast and boom to hoist toys over the side, and the fact that most ocean passages are downwind. The reduced top hamper would result in increased efficiency under motor as well as the ability to motor sail or set a steadying sail.
So maybe a used production catamaran with a cut down rig would fit the bill.

 

Catamaran boat, China catamaran boat, catamaran boat Manufacturers, China catamaran boat catalog https://www.made-in-china.com/productdirectory.do?subaction=hunt&style=b&mode=and&code=0&comProvince=nolimit&order=0&isOpenCorrection=1&org=top&keyword=&file=&searchType=0&word=catamaran+boat&log_from=1&bv_id=1j7v1vfdp4dc

 

Why? There is now Hummer EV / Silverado EV 206 kWh battery available for less than 15k$
Even if you have to pay someone 10 k$ to hack and control them, that max 25k$
Example of control for EV battery: Dala's Battery-Emulator https://secondlifestorage.com/index.php?threads/dalas-battery-emulator.12471/

 

Are those new batteries?

 

No, used!
Is that cause some illogical consequence like for someone in marine world it's better to buy poor quality new Chinese battery than high quality used GM battery?

 

Do the vendors test the batteries for reduced capacity, or are they sold "where is, as is"?

 

Of course it's as is.
Scrap yard don't have knowledge, time and tool to test EV battery capacity.
Event they can't know battery voltage without opening the case and don't know if pyrofuse is blow or not.
Still, knowing the vehicle odometer could be useful.

But between you and me, who care is you can put your hand on high quality battery for 30-60$ per kWh?

Edit: just saw a Rivian 141 kWh battery for 3600$. That 26$/kWh.

 

Are there vendors that test them? I understand you are gambling on it being good, but there are no guarantees. My concern would be more on the safety side. Battery fires are difficult to put out.