A group of solar panels wired in series. Several strings can then be joined in parallel; 3 or more strings each get their own small fuse.
Grouping panels into series strings is how you build array voltage efficiently. Knowing where a string starts and stops also tells you where the fuses go.
A string is panels in series; several strings can then be paralleled. Three or more parallel strings each need their own fuse.
Design your van, boat, cabin or RV system in Wattonomy and it lays out your strings and adds a fuse to each one when three or more are paralleled — from the appliances you actually run, sized to the recognized standard for your region. You see it on the wiring diagram, in the sized parts list, and in a plain-English build pack that explains the reasoning behind every choice. No account, no email — about a minute to a complete, validated design.
A group of solar panels wired in series so their voltages add. Multiple strings can then be connected in parallel to raise current.
Once you parallel three or more strings, each needs its own fuse so a fault in one cannot be fed by the others.
It takes about a minute. No account, no email.