Sally,
My guess on the Gensets is the DC genset is for charging the Propulsion Bank (PB) and the AC is for 120V systems however the added weight and redundancy doesn't offset the cost or (what appears to be) the added charge equipment to go from AC to DC since they state that "The above figures can be better if you run both generators at the same time, then you can get up to 37kw out of the genset for the 100v DC drive".
I have 1 AC,16kW genset (21kW would have been perfect) that is rectified to 164V DC to charge the batteries. Then off the Propulsion bank it goes to a 6kW inverter for the house 120V AC loads. IF I could have spected (afforded) a DC genset then all I would eliminate was the Rectifier. At the time, 2004, a DC genset would have cost 2 to 3 times what an AC genset cost would have been so I understand the reasoning for the AC Generator on my boat.
So guessing here they must also rectify the AC generator to get it to additionally charge the PB. Keeping part of the AC power to go to the House 120V power would be an interesting wiring diagram.
I wonder why 100V was selected to run the motors?...Might be a European thing…. 80)
I'll also mention my solar panels. I added 2-160W solar panels strictly for the 12V loads. The charging was done also off the PB to a 144V DC to 12V DC charger (hooked up but off). Since adding them to the system I haven't drawn 1A off the PB in 3 years for the 12V loads adding to the available travel time. Removing the loads off the PB was a priority to me.
Steve in Solomons MD
Lagoon 410 S2E
I can't imagine that cat sails too well, but some who buy these aren't really into sailing. Beside that point, I have to agree with Steve - the numbers are not clear. Also - why both a DC gen and an AC gen? And yes, large DC gens are very pricey! I've asked our Danish partners at Clean eMarine (manufacturer of Thoosa motor systems) if they know this company. Since EPTechnologies is doing tour boats and ferries in Denmark I imagine they do. They did the first electric canal tour boat in Copenhagen back in 2011. I'm glad to see more companies involved in electric propulsion, but they might do best staying in the large, commercial boat market and leave the electrification of pleasure boat craft to those companies like Thoosa (Clean eMarine), Electric Yacht, BellMarine and Oceanvolt among a few others who have perfected the technology.
Sally Reuther, CEO
Annapolis Hybrid Marine
Now celebrating 10 years providing electric propulsion solutions for sail and power!
On Tue, Aug 13, 2019 at 9:06 AM mike@electricyachtssocal.com [electricboats] <electricboats@yahoogroups.com> wrote:
You do not see too many sailing catamaran with a flybridge. They promote the motor but not the sailing capacity of the boat. Not sure of the market but it is good to see innovation.
Seems it will take the kind of significant government support including legal requirements for non-fossil fuels on the interior waterways and some government financial support to develop much of the products seen on their website. Noted that 123 and Valence are both part of EPTechnologies.
Mike
Electric Yacht Pacific
Posted by: "Steve Dolan" <sdolan@scannersllc.com>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (5) |
No comments:
Post a Comment