Boat Generators

[marshmat]

Cyclops is right about the frequency thing. If you're using North American-built appliances, you need from 110-125 volts at 60 Hz. Many devices will not run safely (or at all) on 50 Hz. (The opposite is true of many 50 Hz European devices.)
If you need "clean" power for electronics, you need a sinusoidal inverter. Step inverters are not useable for computers etc, although they are fine for most appliances. Xantrex is probably your best bet if you want really good charging and inverting equipment, http://www.xantrex.com/ for more. It's not exactly cheap, but they make incredibly reliable units that can easily be adapted to pretty much any boat installation; some will also frequency-match with your shorepower line so you can switch between batteries, generator and shorepower with no interruptions.

[yhxaig]

Cooling

4420 BTU/h

Cooling

9000 BTU/h
Compressor

: DC Airco 22 cc rotary

Compressor

: DC Airco 37 cc rotary
Consumption

: 300 watt 12 or 24 VDC

Consumption

: 470 watt 12 or 24 VDC(10000btu)
Dimensions

: 920L x700W x265H mm/

Dimensions

: 990L x760W x344H mm/



: 36,20L x27,55W x10,43H inches




: 39L x30W x12,40H inches
Weight

: 30 kg/79 pounds

Weight

: 45 kg/88 pounds



Cooling Agent

: R134A Ozone friendly

Cooling Agent

: R134A Ozone friendly
CONTACT Distributor Ian Haig 305-896-1696 Miami. This product made in Northern Europe

[scubajohn]

i was on a dive boat the guy had the 4 roof air units like in a suburban he ran 2 off each engine had the hoses made and used 134-a coolant as for the big altanators they can produce a lot of power while eng. is running and charge the batts. at a good rate not to much this is why cars with lots of loads for windows and ac blower ect use 120 amp alt's. not just for charge

[yhxaig]

DC AIRCO of hollarnd sells a 12 vold ac. 3 amp draw

[StianM]

DC power is something I'm not a big fan off. If you get a isolation faliure your metal components are eaten up by corosion in notime.

AC generators don't have to runn on konstant RPM.
That is only required for maintaining the corect Hz.

If you runn a AC generator at variable RPM you can runn the power trough a frekvensy converter that is driving a electric engine with genertor.
www.elmarin.no has ben delivering something called "clean power" for rolls royce in the past.

I have heard about a electromagnetic clutch witch increase it's slip when RPM is increased so it will produce constant RPM.