DuoGen Cruises the World
Many of our customers are currently enjoying extended cruises. Some are island-hopping in the Caribbean, and quite a few have passed through the Panama Canal and are heading for the Gallapogas Islands and beyond.
We recently had a message from DL in the Grenadine Islands, and he had these comments to pass on about his DuoGen:
“Some marina owners out here are not allowing owners to run their wind generators while on the dock as they are too noisy and neighbours complain. The DuoGen is so quiet that there are no restrictions on its use."

ZEILEN Review
DuoGen’s performance is reviewed in the June edition of Zeilen, Holland’s premier sailing magazine.
Dutch journalists had a DuoGen machine to fit and test for the last few weeks, and found that the installation was ‘easy’ and outputs were in line with our published figures.
We’ll have to wait until we get a translation before we know what else has been said!
Please remember, for Dutch and Belgian customers, DuoGen is available from De Rietpol in Spaarndam, who have a machine on display.

Tel: 023 – 537 1470
www.rietpol.nl

Using Several Charging Sources
It makes sense, on an extended cruise, not to rely on only one source for battery charging. Many yachtsmen fit solar panels as well as DuoGen, and also install smart charge devices and up-rated alternators on their main engine.
We are frequently asked if there are problems associated with operating these systems simultaneously. The short answer is ‘yes’ and ‘no’. There should be no risk of one system damaging another. However, they all rely on monitoring battery terminal voltage to determine the state of battery charge. Where you have multiple charging sources, the output from one will raise the voltage read by the regulator of a second, and this elevated reading can cause the second regulator to assume the batteries are in a higher state of charge than they actually are.
This may cause dump regulators to dump prematurely, or smart charging systems to apply a less than optimal charging regime. There are simple strategies to deal with these interactions. Firstly, keep the number of regulators to a minimum. For example, DuoGen’s regulator will also handle the output of solar panels up to 140 watts. Secondly, dump regulators can be fitted with a bypass switch so that when you are on board, have maximum demand for power and can monitor the system, you can switch the regulators out. Finally, when starting the main engine specifically for battery charging, you can stop DuoGen and isolate the solar panels.
On the positive side, premature operation of regulators usually only occurs when the banks are in fairly good state of charge anyway.

Playing with the Big Boys
The Wind Energy International Trade Fair was held in Hamburg from 11th – 14th May. This is the second year the fair has been held, in response to the dynamic growth of this market of the future.
DuoGen was promoted on the WindSupply stand, where the contribution of UK manufacturers to the growing British and global wind energy market is ‘showcased’.
Many UK companies were represented at the Fair, most of these operating in the fields of large-scale on- and off-shore wind turbines.

Safe Sailing!

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