No assumption needed. When we have several days in a row that are rainy and overcast (like lately) my 300 watts of solar panels can’t keep up with our (livaboard) needs and I have to turn on the battery charger. There are no ill effects since the controllers only allow electrical power flow in one direction.
Bob > On May 22, 2016, at 7:02 PM, Josh Muckley via CnC-List > <cnc-list@cnc-list.com> wrote: > > 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 > <mailto: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! > _______________________________________________ > > 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! Robert Boyer s/v Rainy Days C&C Landfall 38, Hull #230 2501 Boston Street Mailbox #505 Baltimore, MD 21224
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