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2023 NEC Article 690 PV Systems Part 3 Disconnecting Means can be fun!
We take something that can be boring and run it through the Sean White "boring-to-exciting converter" and out comes something sounding fun!
In this podcast we go over different ways of disconnecting solar circuits.
To learn more, go to www.solarSEAN.com or www.HeatSpring.com/sean
Sean White teaches in-person and on-demand online solar and storage courses everywhere. He is currently writing a book on the 2023 NEC with Bill Brooks.
This podcast was recorded at the COP27 climate conference in Sharm El Sheikh Egypt on November 16 2022.
COP stands for something boring, Conference of the Parties, which means that countries and other organizations are the parties. Sometimes I look at what our countries are doing and it is like we are having a big fossil fuel party! It is literally powering parties like Burning Man with flames of fuel! Anyway, this is the 27th year of COP, so it is called COP 27 and the more famous one was in Paris, when they made the Paris Accord or Paris Agreement, back when we had a very famous and likable Kenyan President at COP 21. This is where the US, China and all of the other big CO2 emitters made an agreement to do things to limit temperature rises to 1.5C over preindustrial levels. Being an American, I do not like the 1.5C number, since we use F for Fahrenheit and a change of 1C is the same as a change of 1.8F, so 1.5C x 1.8 = 2.7F. Anyone that uses F for the temperature of their house or the beach should not use C only when they are talking about climate temperatures, unless they are trying to downplay the emergency. Not since the rock that took out the dinosaurs (except for the birds, which are dinosaurs) has the climate changed so fast. Humans are extremely smart and can tell the temperature of the earth throughout the ages and the CO2 in the atmosphere. There have always been slow gradual changes, but nothing like this without an asteroid. We humans are so smart, that we can also fix this emergency very fast.
The big topic in the news this year is about having the rich countries that have contributed the most to CO2 in the atmosphere to help pay for the other countries that are too poor to do much about it. They have high interest rates, to the point where it is like financing things on a high interest credit card, which is financially impossible to make and investment world form.
The problem I see is that in the biggest polluting country of them all, my country, the USA, we have something called politics and there are enough people against paying for our original sin (we are in a biblical place here), that it is not going to happen on a big scale, no matter how bad the US President wants it.
So what is going to make this happen?
Here is my solution…
I see that humans and other organisms can grow like a virus (go viral). You see doubling rates and as many of you may know, of you double a dollar for a month, you have over a billion dollars. In fact if the month has 31 days, you get 2x more than a 30 day month.
Now we can translate this to a disruptive technology, such as solar, wind and storage. We are getting doubling rates and the trick here is to speed up the doubling rate. Not to accept a 4 year doubling rate, to go for a 1 year doubling rate. Some pessimists will have plenty of reasons why this cannot happen, and the answer is that the reason that this cannot happen is if we listen to pessimists.
We have to scale like we are putting the effort of a world war into it and the big thing here is instead of having a war and having a lot of people die, we have seen that wars can be good for the economy, so we can have a huge economic boom, without the war deaths.
It is inevitable that we will scale up solar, wind and storage, the question is how slow (or fast) are we going to go? If we go fast, there are many benefits, plus we are going to do it anyway, so let’s get it done.
Solar and Wind are already the cheapest forms of energy in the world. Energy storage is getting less expensive and in a few years, it will economically stupid to buy a new car that is not an EV and these EVs can easily be plugged in and wired for grid support, which will happen. The question is, are we going to sit around and whine, or are we humans going go get it done!
We are humans. We are the smartest thing in the universe. We can easily figure this out. If we put in an effort, we can pick a temperature and dial it in
2021 International Residential Code (IRC) and Energy Storage Systems (ESS) with Bill Brooks (BB)
2021 IRC requirements for ESS units to be less than 20kWh, 3-foot separation between ESS units, exceptions due to large-scale fire testing (UL 9540A), distance of ESS from garage window vs. window of living space, SolSmart.org PV, Future SolSmart ESS material Bill is developing, 2024 IRC Proposals, lithium-ion not good on the outside of a house in cold places and NFPA 855 Standard for ESS.
2018 International Fire Code (IFC) for Energy Storage Systems (ESS) with Bill Brooks and related topics
This video is based on the 2018 IFC and there are many places that are using the 2018 IFC, in fact I just taught an ESS class to inspectors based on the 2015 IFC. You will have to check your own state to see which version is adopted. At the time I am writing this, the 2018 IFC is the most widely used version, although the 2021 IFC has already been released. Additionally, most of the language between different versions is the same, so understanding one version means you mostly understand the other. Don’t be one of those people that overly worries about studying a different version of a Code.
Topics we cover include: Large-scale fire testing (UL 9540A), FMEA, container batteries/ESS, Lead-acid, NiCad, Lithium-ion, maximum sizes, maximum allowable battery quantities, UL 9540, UL 1973, EMS energy management systems, BMS battery management systems
2023 NEC Poetry Reading Article 690 Part 2 Circuit Requirements
The 2023 NEC has been released and it is time to see how voltage, current and rapid shutdown look in the future!
2023 690 Part 2 includes:
690.11 DC Arc Fault Protection
690.12 Rapid Shutdown
Reading the NEC can be heavy stuff, so if you do not get it the first time around, try listening to it backwards synced with Dark Side of the Moon. Then you will get the secret meaning.
Learn more and take happy classes on deciphering the Code at www.solarSEAN.com or www.HeatSpring.com/sean
UL 3741 Rapid Shutdown solution where the PV array can stay up to 1000V using SMA inverters with Sollega or Ironridge racks!
Rapid Shutdown has traditionally meant putting module level power electronics in the array for PV systems on buildings. There has always been this part of the NEC 690.12(B)(2)(1) that gave you an option to comply with rapid shutdown inside the array with a listed hazard control system. Surprisingly, we can now go back to having something to what rapid shutdown used to be in the 2014 NEC, which we called array level rapid shutdown. Let’s see if someone gets something like this listed for a residential roof.
To see a visual version, take these classes at www.HeatSpring.com/sean
40-Hour NABCEP Advanced PV Certification Training and CEUS
30-Hour NABCEP Advanced PV Certification Training and CEUS
2020 NEC PV, Energy Storage, Building and Fire Codes for PV System Inspectors