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hi youtubers jeff cote here with  uh ask pys our little series about  figuring out making sense of all this  complicated stuff on both  so we've got a question from a fellow  boater and he's asking jeff i'm  installing solar panels on my boat  good choice it's not a gimmick solar  panels definitely work  can you tell me where the fuse is before  the battery or after the controller  so the solar controller itself is going  to be connected to the battery  and the fuse needs to be connected  right at the unswitched distribution  remember that concept we bring it all  the time  effectively if you had a no one switch  distribution then you would actually put  the fuse from the solar controller to  the battery  at the battery why because the battery  has  unlimited power i mean not unlimited but  certainly more than anything can handle  on your boat  right you can have a dead short having a  thousand apps  between a positive and negative post on  a battery so what's really important  here is you want to make sure that the  positive wire leaving the positive post  or the unswitched  positive distribution has a fuse that is  size appropriately  for the wire the controller and the  panel  right and so you've put the fuse right  at the beginning of the circuit  and the beginning of the circuit on a  solar panel install  is actually the battery not the solar  panel some controllers  actually have a fuse right in it so in  this instance there's a fuse here but  that fuse is between the controller and  the panel so there's actually two fuses  one between the controller and the panel  and another one from the battery  to the controller so it's important to  put the fuse  to the unswitched distribution or the  positive post on the battery that was a  good question from nono  thank you for watching this video if you  have any questions please ask it below  or use our contact form on our website  and don't forget to  subscribe  so that you can keep having these weekly  and we're producing almost four videos a  week now  and thanks again for watching