I have a modern charger. ProMariner P-Nautic 1260. Granted my batteries are big and not failing.
For unknown reasons I have blown a Xantrex True Charge 40 amp(modern). Refunded under warranty. Could have been bad luck but I'm leaning towards the idea that it is bad engineering. Under the exact same conditions I've never had a problem with the P-Nautic. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Wed, Oct 30, 2019, 1:27 PM Steve Thomas via CnC-List < cnc-list@cnc-list.com> wrote: > Ok, so I have read the other responses and what your experience means to > me is that you have been doing this with reasonably good batteries and or > older battery chargers. I too have never had a problem with the charger in > a boat but I have personally killed 4 or 5 of the modern chargers with > electronic voltage regulation by attempting to start cars and tractors with > the chargers still hooked up. Here is what I think is happening: When the > starter relay opens the starter motor circuit, there is a high voltage > inductive kick-back from the collapsing magnetic field in the motor that is > "clamped" to a lower voltage by the low impedance through a good battery. > If because of a bad battery or wiring or whatever that energy is not > clamped down to a low enough voltage then it kills the voltage regulator > electronics. The rectifier diodes themselves have survived. I have > installed a shorting wire around the circuit board in a couple of the > affected chargers and they still work but they are anything but regulated > now. > > A suitably large rectifier diode installed across the starter motor could > prevent this from happening. > > Steve Thomas > > > > ---- Edd Schillay via CnC-List <cnc-list@cnc-list.com> wrote: > Listers, > > I’m seeing conflicting opinions on the web and would like to know from the > collected wisdom of the group. > > Is it OK or not OK to start your engine while your battery charger is > running? > > I was surprised to see some people say it is not, as people have been > jump-starting their car engines for decades, but am interested in seeing > what you all have to say on this. > > All the best, > > Edd > > > Edd M. Schillay > Captain of the Starship Enterprise > C&C 37+ | Sail No: NCC-1701-B > Venice Yacht Club | Venice, FL > > Starship Enterprise's Captain's Log <http://enterpriseb.blogspot.com/> > > > > > > > > > > > > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
