My natural assumption is no. If you turn on the charger, the solar controller is probably just going to turn off or reduce output. The only thing to be concerned about is connecting or disconnecting the battery while the solar panels are connected. The load on/load off surge is probably not good for the controller. Many of them have a connection sequence stated in the owners manual. Usually its battery on first then solar on. Reverse the sequence to disconnect the controller.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On May 22, 2016 6:49 PM, "Charles Nelson via CnC-List" < cnc-list@cnc-list.com> wrote: > I am about to hook up a Morningstar Sun Guard SG-4 controller between a > solar panel and my battery #1. My plan is to use the NC sun to keep my > starting battery topped off between races without using the battery > charger/AC although if I am on board, I will use the charger. > > My question for the list is will the > Solar controller be damaged if I switch the battery charger on while the > solar unit is still connected to the battery? My SWAG is that it is > protected against such events with a diode but I prefer a confirmation of > this before it happens. > > Charlie Nelson > Water Phantom > C&C 36 XL/kcb > > > > > > > > > > Sent from my iPad > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! >
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