what happens if the fuse blows at the battery connection

[ontheroadagain]

I have a 20amp inline fuse between the batter bank and the mppt controller. I also have one on the other side of the controller between it and the solar panel.<br><br>My question (worry) is: what happens if the fuse blows at the battery.<br><br>The directions for the mppt controll has a warning to make sure you connect the battery side to the controller before connecting the solar panel to avoid damage. I'm guessing you don't want current flowing into the controller with no where to push that current (like the batteries).<br><br>So have I made a mistake by fusing between the controller and the battery??<br>If the fuse goes at the battery then I could have current coming in from the panel and no where for it to go.<br><br>Thoughts/Suggestions ??<br><br>thanks

 

[wrcsixeight]

I'm sure your Controller instructions said to include a fuse between controller and battery bank and told you the maximum fuse size to use. &nbsp;I'd not worry. &nbsp;Perhaps call/ e-mail the controller manufacturer and see you can talk to a tech instead of somebody to read the instructions back to you.<br><br><br>I put a 30 amp circuit breaker on mine that I can push the button to disconnect, and turn the lever to reconnect. &nbsp;I do this to reset my amp hour counter which is powered by the controller, but only at night.<br><br>Mine (BS 2512i) did not say to put a fuse between panel and controller.&nbsp;

 

[ontheroadagain]

mine didn't say to put a fuse between the panel and controller either.<br>I thought maybe it was a good idea in case of lightening or some weird surge

 

[Zil]

If the fuse between the battery and controller burns, if not the wire, it is probably a short in the controller. Bad controller, no charge.<br>No need for fuse from solar panel.<br>Note; always fuse at battery to protect the size of the wire.

 

[blars]

Fuses are way to slow to do any good against lightning.&nbsp; A nearby hit can damage electronics, and a direct hit will vaporize almost any wire.