Re: [RE-wrenches] RSS: Is it necessary?

Tyrone: You raise an excellent point. Wire guarding is required on ground mount arrays , although the language is vague and the industry does not provide many h

[RE-wrenches] Why are RSD devices burning up?

Wrenches: I came across this U-tube video that I think is relevant: https://www.youtube.com/shorts/Lyfdr1AWzU4 A factor that aggravates the arc producing and sustaining characteristics of solar circuits is the nature of the IV curve. One can short solar circuits and create a zero volts situa

Re: [RE-wrenches] RSS: Is it necessary?

As far as ground mounted arrays are concerned there is one clear protection mandated by the NEC-the requirement for protection from physical damage for all conductors under 8'.. although this isn't as specific or redundant as rapid shutdown requirements, it typically means conduit or at least some

Re: [RE-wrenches] RSS: Is it necessary?

Rebekah: Thank you for your post. I have looked at UL3741 over and over. Here is what I have gleaned: After module level RSS was mandated there was a reevaluation of what voltages were actually dangerous for firefighters to be exposed to. It turns out 80 VDC is not dangerous and, given all

Re: [RE-wrenches] RSS: Is it necessary?

Get the offgrid permit (PRETTY RARE) and then remove anything that makes the system less reliable. We use to be concerned with losing insurance offgrid but the cost is so high now that we (offgrid folks) often self insure. Do anything that can make it easier for a fire crew, if they stay. They

Re: [RE-wrenches] RSS: Is it necessary?

Too much 'fear over facts'. -GlennOn Feb 17, 2025 13:26, Rebekah Hren via RE-wrenches wrote:I read the wrenches post regularly, as does Brian Mehalic. We have both been on CMP-4  (responsible for Article 690) for the past three code cycles. I believe a few other CMP members probably read too. The

Re: [RE-wrenches] Inverter ratings exceeding 25kw fir battery backup

Wrenches, l have both single and 3 phase residential systems over a 100 k and we used the largest SMA's available and now 15 years later they are starting to fail so fewer bigger more efficient inverters are a plus. Now with PG&E NEM 3.0 Batteries are the only way to store and use later, and then t

Re: [RE-wrenches] SolarEdge refusing their bad inverters

Wrenches, Just wait till some of these start ups that are now gone have battery failures, already happening and when we got to pay per pound to do what ever is best, yup on our dime. Fun times. On Mon, Feb 17, 2025, 11:39 AM pieter offgridenterprises.org via RE-wrenches wrote: > That is an unfor

Re: [RE-wrenches] SolarEdge refusing their bad inverters

That is an unfortunate side effect from living in California. With a little bit of disassembly all be it not much, in most states the scrap yards will pay for E-waste. Pieter Huebner Project Manager Off Grid Enterprises From: RE-wrenches on behalf of david quat

Re: [RE-wrenches] Inverter ratings exceeding 25kw fir battery backup

400a residential service, all electric, 2 full 200a panels worth of loads, customer wants whole house backup...we want to design it for reliability. On Mon, Feb 17, 2025, 9:56 AM Dave Angelini Offgrid Solar via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Why is there a need for m

[RE-wrenches] SolarEdge refusing their bad inverters

Today I learned that Solaredge will not accept responsibility for the E-Waste they generate. They refuse to reimburse installers who are stuck with it. In my experience SolarEdge has a very high failure rate. My local e-waste facility doesn't accept solar inverters. -- David Quattro CA License # 9

Re: [RE-wrenches] RSS: Is it necessary?

At least some reasonable exceptions for off grid, smaller arrays, or arrays that don’t cover the entire roof.  Also module level shut down is just too much.   I definitely can see some type of remote  disconnect for larger, higher voltage arrays.Ray Walters Sent from my iPhoneOn Feb 17, 2025, at 1:

Re: [RE-wrenches] RSS: Is it necessary?

I read the wrenches post regularly, as does Brian Mehalic. We have both been on CMP-4 (responsible for Article 690) for the past three code cycles. I believe a few other CMP members probably read too. The International Association of Firefighters ("largest and most influential labor unions in Nort

Re: [RE-wrenches] UL3741

My understanding of UL3741 PV hazard control is that it is another way to meet 690 rapid shut down requirements without MLPE. As long as you can locate the inverter within the array boundary. A nice solution for commercial where locating the inverter on the roof is fairly easy. I'm interested

Re: [RE-wrenches] Inverter ratings exceeding 25kw fir battery backup

The same in NY we had to change existing equipment to stay within the 25k AC net metering limit. Regards, Lloyd Get Outlook for iOS From: RE-wrenches on behalf of Dave Angelini Offgrid Solar via RE-wrenches Sent: Monday, February 17, 2025

Re: [RE-wrenches] RSS: Is it necessary?

Seems like there has been talk of rescinding RSD requirements before on this forum. It also seems that it might gain some traction if a dedicated group of installers spoke up to the right people (Code Making Panel for instance) and put some time into it. I agree that at the very least we need

Re: [RE-wrenches] Inverter ratings exceeding 25kw fir battery backup

Why is there a need for more than 25KW for residential please? Just curious. In Nevada, 25KW is way into commercial. Dave Angelini Offgrid Solar "we go where powerlines don't" [1]https://offgridsolar1.com/ [2] [1] e-mail offgridso...@sti.net text 209 813 0060 On 2025-02-17 9:43 am, Tyrone

[RE-wrenches] Inverter ratings exceeding 25kw fir battery backup

Greetings wrenches, In Pacific Power territory we are coming up against roadblocks with regards to whole house battery backup systems with inverter ratings higher than 25kw. Even when the generation capacity is below the 25kw residential limit, net metering applications are being rejected based on

Re: [RE-wrenches] RSS: Is it necessary?

It seems anecdotal until it happens to you. My mention of civil disobedience has been answered clearly with a “No” in this forum, and I'm fine to hear that. I'll clarify a few points as to why I honestly think RSD has been a huge and costly mistake. I genuinely think RSD requirements should