62' Sailing Yacht Refit with Lithium Battery Powered Air Conditioning - How Does it Work!? 

They are full of shit

Thanks Ben!

Thanks Jesse! Back at ya!

You know it!

Hi Richard! Sorry for the late reply. We will be at both the Annapolis power and sailboat shows if you want to chat!

#truth

Hi Roland, Yes he will run the main engines to charge the batteries. The intermittent engine runtimes during the normal underway operations of the yacht will store sufficient charge in the batteries to run all of the onboard systems, including the HVAC, around the clock. When necessary, the engine can also be run at anchor for a couple of hours, loaded by the alternators, to charge the batteries which provide energy for the rest of the day. Would you rather run a generator 24/7, or run your mains for a couple hours a day to have power all of the time? The horsepower available from the main engines far exceeds the needs for power generation. There is a total of 28kw of DC changing power available from the 48v Integrel generators and APS alternators with wakespeed regulators, mounted to each engine. As far as DX being more efficient than chillers, we agree with you! If you watched the video you've listened to us explain the nature of this "VRV" air conditioning system. Variable refrigerant volume is a form of direct expansion cooling. Those are 51v 16kWh batteries and there are three of them for a total of 48kWh. For those that prefer to think in 12 volts, that's 4,000 amp hours.

@@boatrx Well answered, thank you. But I would rather charge my house bank from a dedicated generator than a main engine any day. With the main engine used for propulsion and auxiliary charging. Re cooling unit, if the gas is not expanding directly in an evaporator in the room being cooled then it is not DX by definition. All the best

@@momosworld7312 - why a dedicated genset? Surely the benefit of less diesel motors onboard, and the high amp alternators at each motor, makes the use of a dedicated generator redundant? The whole industry is fast moving to this model, and often in combination with a electric drive too….

@@robbief1 the “the whole industry” is not the real world… Using your mains as your primary charging system mean a lot more hours on a system that is there for emergencies and maneuvering and that is much more expensive to replace. The propellers are spec for the HP of the engine. The charging system being described will take significan HP (20-40hp) . I cruised for years with a 165HP Volvo Penta that had a 200A alternator. When the batteries where low and alternator at full throttle the boat( Hallberg Rassy 53) would not have sufficient power to maneuver efficiently in situations with strong currents etc.

@@momosworld7312 - Good points, thanks for sharing. I see some are just opting for either Hybrid Drive (In-line electric motor in combination with Diesel engine - see HH44), or even just going fully electric (sailing Uma). Would you consider either? I think it’s great that there is an array of people trying all different options, it’s pushing the whole industry forward :)