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diy solar

Fuse, is it required to a Jackery?

linecaster

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Jan 1, 2021
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I was advised by a friend to place a fuse from the 200 watt solar panels to the Jackery. Is this required?
 
Follow up question, what size fuse should be used between two 100 Watt solar panels and a jackery?
 
Recent re-education on my part of NEC required over-current-protection (OCP) for solar panels yields that for less than or equal to 2 panels/strings in parallel, no OCP is needed.

2S, 6S, xS2P = none of these need fuses/breakers. As soon as you parallel 3 or more, you need a fuse/breaker on each parallel string.

TL;DR
you don't need one.

If you want to use one, the panel label likely lists a maximum fuse for a single string. If they are in series, you need only one. If they are in parallel, you could use 1 fuse that's 2X the panel stated fuse.
 
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