My 175w and 50w are fused for the gauge of the cable, directly adjacent to the controller. This is per the renogy manual I believe. 12 awg solar cable would be likely fused at 20a (assumes 105deg rated insulation) which at our 20vdc would translate to a BIG 400w panel. (C&C 65?) These bigger panels are typically 48vdc I believe so the current stays modest. anyway - no need to fuse at the solar panel.
The batteries are connected in parallel with copper bus bars and the positive wires are protected with cube fuses at the battery. (Both solar and shore power Chargers and the cables to the battery switch) Dave 33-2 Dave Sent from my iPhone > On Aug 29, 2021, at 7:47 PM, Marek Dziedzic via CnC-List > <cnc-list@cnc-list.com> wrote: > > > I have that end covered. Proper fuses right at the battery terminals. And the > solar panel is tied to the controller, not the batteries themselves. But > there is some 25’ of cable from the panel to the controller and I always > wonder if that part should be protected as well. The solar panel is only 50 > W, so it cannot produce too much current (and too much heat). But I wonder > what it the proper way to connect it and protect it. > > Marek > > From: Ken Heaton via CnC-List <cnc-list@cnc-list.com> > Sent: Sunday, August 29, 2021 6:26 PM > To: Stus-List <cnc-list@cnc-list.com> > Cc: Ken Heaton <kenhea...@gmail.com> > Subject: Stus-List Re: Another Solar question > > Really, should there be a short or other electrical failure, the big source > of current that would heat up and burn up the wires and possibly set the boat > on fire, would be the boat's house or starting battery bank. So the fuse > should be as close as possible to where the wires from the solar panels tie > into larger wires or bus bars (or the batteries if wired direct to the > battery bank). As close as 6 inches if possible. > > Ken H. > > On Sun, 29 Aug 2021 at 19:19, Marek Dziedzic via CnC-List > <cnc-list@cnc-list.com> wrote: > I have a simple question - the fuse is there to protect the wire; so, the > fuse should be as close to the solar panel as possible, shouldn't it? Where > would you put it? Outside, next to the panel? Or inside, as soon as the wire > goes through the deck? > > I bet there are some rules of thumb. > > Thanks > > Marek > 1994 C270 Legato > Ottawa ON > > > Thanks to all of the subscribers that contributed to the list to help with > the costs involved. If you want to show your support to the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
