Recent content by sparklehunt

I think we are agreed about protecting at it’s rating. So the original question still stands does a OCPD at every individual parallel battery constitute “protection of the wire” after the combination of the parallel batteries?

Yes agreed. But then what do you size the wire to? This implies that we size wires based on what the battery bank can output. I don't think so. Example: what if you have 100 batteries in parallel, you're not going to size the wire to what the battery can output. You can't You size it to the...

This seems like a long time, but I need some experience with how fast wire get hot get when used at different multiples of their rating. Non-sinusoidal, as in DC?

I'm understanding that the fuse rating is for not tripping but for normal operation, and one must exceed it by a safety margin to blow. Then why do normally we add that 1.25 or 1/0.8 nuisance factor if the fuses account for that already?

I know class T is preferred for it's 10kA+ AIC blah blah... but I was just curious about ANL fuses and looking at the Eaton Bussman (reputable brand) datasheet for their fuses. See anything weird? The labelled nominal fuse Amperage doesn't trip at that nominal!

Why after the bus bar? "Total output of all batteries" makes no sense. That threshold is very high and is not the determining factor in highest current in a system. Did you mean if the wire can safely carry the max load current, as calculated by Wattage * 1/efficiency * 1/batt voltage * 1.25...

if you fuse each parallel battery, I would think that the fuse after the bus-bar to the inverter is unnecessary. Each battery is already protected. There is no situation where any individual fuse would fail to trip, when your hypothetical combined battery fuse would trip. In other words, the...

I had this experience when you waste more money overall trying to save...should just pony and get the best from the start So in place of a contactor you have a what?

Also have NEW Cerbo GX (bought for $340 + tax) selling for $300 And NEW GX Touch 50 (bought for $232 + tax) selling for $200

From San Jose, CA. Selling because I'm going to 24V system. Purchased for $1,570.80 + tax. Selling for $1420.

What is the best known practice of connecting these? A fuse and switch for each parallel string? Or only switch on every string and a large T-class fuse rated for the total combined after the combination node.

So you have the ACin wired up to a 50A RV plug style (with L1,L2,N,PE)? What happens when you encounter a 30A style plug? Can you physically have two styles of female plugs wired in parallel on ACin (so L1,N,PE branch off to another plug)? Also can you explain what the transfer switch lets you...