For a DIY, I would not be too confortable with such high voltage because of arcing and fire risk, I would prefer running two strings of 250V.In the end it should be far simpler to run a single or maybe two pairs of PV wires back from the barn. Run at something close to 500v and you’re miles ahead.
I suppose everyone has to operate within their comfort zone. I don’t personally have any qualms regarding higher voltage, I sure as heck don’t work on it live.For a DIY, I would not be too confortable with such high voltage because of arcing and fire risk, I would prefer running two strings of 250V.
But this depends also of how much current and voltage your SCC(s) can handle.
Do you plan to use rapid auto-shutdown devices at the panel level?
I am mounting solar array on my Barn that is 200 foot from my house.
I use high voltage DC to run to my house 420 feet from the array.Should I mount the Hybrid inverter in the barn and transmit AC instead of running the DC current to my house from the array?
You and I are in agreement on this.PV wire is cheaper than 4 conductor UF wire. Try to use higher voltage strings, use the max voltage input for the charge controller rating and run the PV the long distance.
Do RSD transmitters have signal integrity for this distance of run? Looks like APSystems says 1000ft out & back distance.Rapid shutdown at panel level is required.
I can't say as I do not use roof mounts. I prefer to not have to implement RSD and add to costs.Do RSD transmitters have signal integrity for this distance of run? Looks like APSystems says 1000ft out & back distance.
It all depends on personal preference and skills. I am using strings with about 500 vdc VOC in cold weather for 3 years now and have no regrets whatsoever.For a DIY, I would not be too confortable with such high voltage because of arcing and fire risk, I would prefer running two strings of 250V.
Is the fire risk that bad if the wires are, upon reaching structure, encased in SCH80 or EMT?
If the 500V wires arc and burn up in the ground, I don't think it would cause an issue except with an extreme freak accident.