In this podcast Bill Brooks covers the International Residential Code from the International Code Council (ICC), which are rules in addition to the NEC for installing ESSs in 1- and 2-family dwellings. Bill Brooks is instrumental in writing the material that we cover and sits on many different panels, such as the UL 9540 standards technical panel, and comes up with the rules. Stay tuned for another podcast where we will cover the International Building Code (IBC) and the International Fire Code (IFC), which are used for other than 1- and 2-family dwellings.   We cover here: UL 9540 (umbrella standard), UL 1973, UL 1741, 2018 IRC, 2021 IRC, 2024 IRC insight, LG Chem Battery, Tesla Powerwall, SolarEdge, SMA, BYD, Enphase, Sonnen, Inverters and sub-assemblies, lithium-ion and lead-acid battery preferred applications, using retired EVs to power your house according to the 2018 IRC, NEC 625 Bidirectional EV charging/discharging, battery locations, habitable locations, ventilation, hydrogen and flammable gasses, protection from impact, vehicle approved barriers, parking bollards, parking curbs, and more!   Although this podcast's focus is on residential ESS, we do mention some Utility-Scale ESS relationships with UL 9540.   To learn more about solar and energy storage, go to www.solarSEAN.com where we have NABCEP classes and all kinds of learning materials.

Building Integrated PV (BIPV) has been around forever as far as the solar industry is concerned (4 or 5 decades). It has never taken off like people think. There has always been a lot of hype around BIPV, especially amongst laypeople. Will Tesla change BIPV forever? I would think not, except I will never underestimate a guy that turned a small EV company into the world's most valuable automaker, lands reusable rockets routinely, and can make non-human primates play video games with their thoughts, all things which were considered impossible.    For more information and education on solar and storage, go to www.solarSEAN.com !

In this podcast we are going to go over NEC 706 with Bill Brooks, thy guy who wrote a lot of this material and was there every step of the way. Sometimes Bill does not agree with what ends up in the NEC and he will let you know it here first on this podcast.   To have fun and learn more about solar and storage, go to SolarSEAN.com

We are going to cover short circuit current rating of equipment with Bill Brooks. Bill Brooks has been in the solar industry for many decades and knows everything about solar and energy storage. He writes the codes, he does consulting, he's a busy guy and here he is on this podcast.    To have fun and learn more about solar and storage, go to SolarSEAN.com

In this episode, we are going to present a particular rumoured certification exam question and then get into the details of how you may install large central inverters with grounding electrode conductors. This is an advanced topic, but if you are a beginner, you can still be amazed at how these huge multi-million dollar PV systems are put together.   To have fun and to learn more about solar and storage, go to SolarSEAN.com

Solar PV shading can be worse than you think, since solar cells are connected in series. We will cover the Solmetric Suneye shading device, (note that Vivant Solar was bought by Sunrun since the recording of this podcast), we will cover some software that can digest shading information, such as Aurora Solar, Helioscope, Energy Toolbase, PVsyst, Albedo, Sketchup, Skelion, PVCAD, AutoCAD, and more. Then we talk about single-axis trackers, concentrated PV, seasonal tilting, concentrating PV, seasonal tilt and many more angles. 

In this episode, we are going to cover, air mass, global solar radiation, direct solar radiation, albedo solar radiation, diffuse solar radiation, bifacial solar, pyranometers, pyrheliometers and the solar constant.   To have fun and to learn more about solar and storage, go to SolarSEAN.com

This podcast covers the effects of temperature and irradiance on PV voltage and current and all different kinds of azimuth, which is what a compass reads. Did you know that the magnetic North Pole is moving from Canada to Russia?   To have fun and to learn more about solar and storage, go to SolarSEAN.com

When light comes from the closest star (the sun), it will give us solar power and solar energy. We are going to talk about the difference and how to quantify irradiance and irradiation. We also get into solar insolation, tilt angles, peak sun hours in different locations including Germany, the home of Hermann Scheer who kicked off the solar revolution!   To have fun and to learn more about solar and storage, go to SolarSEAN.com

Energy comes in many forms. From kWhs, to Joules, to cheeseburgers,  to a gallon of gas, see how you can convert these different energy containing forms.    We also will get into the speed of electricity, Ohm’s law, Horsepower, the NABCEP PVA exam and PV module level rapid shutdown for PV systems on buildings.   To have fun and to learn more about solar and storage, go to SolarSEAN.com

Many people in the solar and storage industry do not know much about electricity and now is the time to have fun and learn. In this episode, we will introduce you to people with names like Volta, Ampere and Ohm, get ready to power your brain cells with all of that stored energy from last nights tacos.   This podcast includes both basic and advanced material and this episode is on the basic side. If you are advanced, you still can learn something, such as how to explain things to normal people.   To have fun and to learn more about solar and storage, go to SolarSEAN.com

One of the most difficult things to do with the NEC, is to understand how to use it to properly size wires. You can get 10 of the top experts in the world in a room and if you talk about how to properly size a wire, you can be sure there will be exciting conversations (disagreements). The best article I ever read on the subject was in the now retired SolarPro Magazine, where you can still access old articles at www.solarprofessional.com. May SolarPro someday be resurrected!   Wire sizing is very uniform throughout the NEC, so if you truly understand this article, you will be able to wire size about anything, including an energy storage system or a circuit to an air conditioner on the roof.   As I read this article that is based on the 2011 NEC, I make comments and update how to comply with the 2020 NEC. A few differences are that we no longer have 1A fuse increments below 15A (we skip from 10A to 15A now) and we no longer derate for conduit in sunlight on a rooftop.   Warning: This information is difficult, so do not expect to understand it in a day. You are welcome to skip this podcast, or you can do what I did when I first read NEC Article 690. I did not understand it, but got familiar with it and the terminology and after reading it 1000 times or so, I wrote some books on it.   To find out more about solar and storage, checkout www.SolarSEAN.com !

The most misunderstood PV label (“terminals on line and load side may be energized in the open position”), DC and AC disconnects, Capacitors, PV is on when the Sun is up, Pocket Voltage Indicator, Hot Stick Voltage Detectors (only work with alternating current), Lockout Tagout (LOTO), Material Safety Data Sheets (MSDS), 6-feet = Fall Protection, Guardrail Fall Protection, Safety Net Fall Protection, Personal Fall Arrest Systems (PFAS), Anchor, Harness, Lifeline, Shock Absorbing Lanyard, Ladders Safety, Fiberglass vs. Aluminum Ladders, Working Around Power Lines, 3 points of contact, Tool Backpack, Yoyo (self-retracting lifeline) and Sun Exposure!

NEC, too much current on a wire, OSHA (Occupational Safety and Health Administration) for employees, NFPA, Battery Bank Locations, AHJ (Authority Having Jurisdiction), NABCEP, Hydrogen and Ventilation with Lead-Acid Batteries, Guarding Live Parts, Working Spaces NEC 110.26, Panelboards, Personal Protective Equipment (PPE), Fall Protection, Arc-Flash Protection, Skylights, Ergonomics, Staging, Preventing Lumbar Disc Injuries, Volt Meter Testing, First Aid Kits and Eye Wash Stations.

AC-Modules, Direct PV Systems, Water Pumping with PV, Self-Regulating PV, Hybrid PV Systems vs. Hybrid Inverters, Solar Living Institute (RIP), Pumped Hydro Storage, Utility Scale Solar Farms, Large Scale PV Electric Supply Stations (NEC 691), PV Feed-in-Tariff’s, NexTracker Single Axis Trackers, Distributed Generation (DG), NABCEP, Community Solar, Community Choice Aggregation (CCAs), SEIA Houses per MW, 6kW per house average, Energy Efficiency, Resistance Heater 100% efficiency vs. Heat Pumps that are 3x better than 100%, Spectrolab Space Solar.

Utility Interactive PV Systems, Direct Current, Alternating Current, 5-minute UL 1741 anti-islanding requirements, PV the anti-load, net-metering, residential and commercial voltages, 120/240V, 120/208V, 277/480V, Delta, Stinger, Medium Voltage, High Voltage and Ultra High Voltage Connections, Nikola Tesla, Utility Scale PV, NEC Article 691, Charge Controllers, Stand-alone (off-grid), Rectifier (ac-to-dc), Tesla Powerwall, AC-Coupled PV, DC-Coupled PV and SolarEdge.   Stay tuned for Part 3 of PV Markets and Applications Next Week!

PV Markets and Applications, Grid-Tied PV with and without Batteries, Voltage Sags and Peaks, California Rule 21, Energy Storage, Smart Electronics, Bidirectional EVs, UL 1741, UL 1703, CE, NEC, Anti-islanding, Stand-alone, Multimode Inverters, Microgrid Interconnect Device (MID), Interactive Inverter, Solar in Space, Space Based Solar Power (SBSP), Portable Solar Power, Hybrid, Utility Scale PV, Distributed Generation (DG), Concentrated PV, Concentrated Solar Thermal, Solar Thermal vs. Solar PV. Stay tuned for Markets and Applications Part 2 of 3 next week!

PV Markets and Applications, NABCEP Exam, Edmund Becquerel, Photovoltaic Effect, Einstein’s Photoelectric Effect, PV Flash Testing, Bell Labs, Vanguard 1 Satellite, World Installed Capacity of PV, 1 TW of PV Installed, Hockey Stick PV Growth, Space Based Solar Power (SBSP), Dyson Sphere, Swanson’s Law, PV $77/watt in 1977, Solar PV and Eclipses, Guerrilla Solar and Perpetual Solar Flight with the Solar Impulse.

What makes different battery technologies better for different applications, primary and secondary batteries, state of charge (SOC) vs. depth of discharge (DOD), voltage vs. charge, battery open circuit voltage, battery internal resistance, lithium vs. lead acid, battery nominal voltage, 3.6V, 3.2V and 2V, cycle life factors, energy per weight, energy per volume, power per weight vs. energy, arbitrage, self consumption, max discharge current vs. continuous current, charge voltage vs. nominal voltage vs. float voltage, BMS,  algorithms,  NiMH, NiCad, recycling batteries. To find out more about everything solar and storage, go to solarSEAN.com

Article 705 applies to PV and ESS. Everything we say here is going to apply to anything backfeeding the grid or a microgrid, however we will use ESS examples. We cover anti-islanding, Microgrid Interconnect Devices (MID), IEEE, Microgrid System definition, 705.11 Supply-Side Connections, 705.12 Load-Side Connections, 705.13 Power Control Systems (PCS), Article 705 Part 2 AC Microgrids. To find out more about everything solar and storage, go to solarSEAN.com  

In this podcast we cover material in Chapters 6 & 7 in the NEC (not including 706 ESS in detail, which we covered in a previous podcast) from an ESS point of view, including 625 EV Power Transfer Systems, EVSE=EV supply equipment, 692 Fuel Cells, 702 Standby Systems, ATS (automatic transfer switch), MID (microgrid interconnect device), 705 Interconnected Power Production Sources, 706 Energy Storage Systems (ESS), 710 Stand-Alone Systems, 712 DC Microgrids, 750 Energy Management Systems, Power Control Systems, Chapter 8 Communication Systems, Chapter 9 Tables, Conduit Fill Tables, Voltage Drop Tables. To find out more about everything solar and storage, go to solarSEAN.com

Article 90 Introduction, Art. 100 Definitions, Art. 110 Requirements for Electrical Installations, Art. 200 Use and Identification of Grounded Conductors, Art. 240 Overcurrent Protection, Article 250 Grounding and Bonding (& Soares book), Art. 310 Conductors for General Wiring, Art. 358 EMT, Art. 480 Storage Batteries and Chapter 5 Special Occupancies, including aircraft hangers! To learn more about energy storage, go to www.solarSEAN.com

In this podcast we will go over and explain NEC Article 706 Energy Storage Systems Part III “Installation Requirements”, Part IV “Circuit Requirements”, Part V “Flow Battery Energy Storage Systems” and Part VI “Other Energy Storage Technologies”. To learn more about energy storage, go to www.solarSEAN.com

In this podcast we go over: ESS and the NEC, 2020, 2017 and 2014 NEC, 706 ESS, 710 Stand-Alone Systems, 712 DC Microgrids, 690 PV, NABCEP, 1897 NEC, 1984 NEC, Statistics, NEC Chapters 1-4, 5, 6, 7, Article 705 Interconnected Power Production Sources, Chapter 8 Communications, Chapter 9 Tables, NFPA 855 Standard for the Installation of Energy Storage Systems, 2020 NEC pdf, Article 480 Storage Batteries, NECA, UL 1973, UL 1989, UL 9540, UL 2436, Flywheels, Inverters, Converters, Gravity ESS, UPS, Flow Battery, AHJ, Qualified Person, Details of Sections 706.2 through 706.16 (Parts I and II of 706). Part I of Article 706 is “General” and Part II is “Disconnecting Means”. To learn more about energy storage, go to www.solarSEAN.com

In this podcast, we will cover: Solid Oxide Fuel Cells, Bloom Energy, Bloom Box, Hydrogen from Natural Gas, Server Module, Ethanol, Lithium vs. Lead-Acid, Solar Family Reunion, Nameplate Capacity vs. Usable Capacity, Round Trip Efficiency, Cobalt, Graphite Anode, NMC, LFP, LifePo, NCA, Reactive Power (Q), Black Start, VRLA, AGM, NiMH, Silicon Graphite Anode, Tesla batteries, Sodium Sulfur, UL 9540, UL 1973, LG and more To learn more about energy storage, go to www.solarSEAN.com

In this podcast, we will cover Energy Storage Systems (ESS) growth rates, Lithium and other markets, Concentrated Solar Power (CSP), Molten Salt Storage, Fly Wheel Storage, Compressed Air Energy Storage (CAES), Ternary Batteries (NMC or NCA vs. LFP), Energy Density vs. Specific Energy, Battery Memory Myths, Protection Circuits, Lead-Acid Deep Cycle Batteries, Maintenance, Equalization, NiMH, NiCad, Lithium vs. Lithium-Ion Batteries, Lithium Air Battery, Lithium Polymer, Microporous Electrolyte vs. Porous Separator, Tesla battery cost advantage rumors, Vanadium Redox Flow Battery, Anolyte, Catholyte, Oxidation, Zinc Bromine Flow Batteries, NEC and more!  To learn more about energy storage, go to www.solarSEAN.com

In this podcast, we will focus on the following manufacturers: Samsung, LG, Mitsubishi and Sungrow. (In another podcast we will cover other manufacturers) Some of the topics included here are: Diversified manufacturers and bankruptcy risks, warranty insurance, distributed energy storage, UPS, residential and telecom smaller scale comparisons, virtual power plants (VPP), cells, racks, containers, peak shifting, smoothing, power vs. energy applications, frequency regulation, pouch, prismatic and cylinder cells, capacity, specific energy, energy density, software, PLC, state of charge, power control systems (PCS NEC 705.13), artificial intelligence (AI), grid stabilization, voltage control, monitoring, voltage drop (rise), UL 1741, C-rate, supervisory control and data acquisition (SCADA), lithium vs. sodium sulfur battery, and energy management systems (EMS).  To learn more, go to www.solarSEAN.com where you can find classes, flashcards, consulting and everything under the sun.

In this podcast, we will cover: battery charging and discharging, voltage levels, coulomb counting, data, temperatures, loads, warranties, battery management systems (BMS), smart batteries, dumb batteries, self discharge, rubber band effect, button battery dangers, FAA battery rules. To learn more about batteries go to www.solarSEAN.com

Topics covered: Transportation of batteries, lithium metal dendrites, lithium ion, International Air Transportation Association (IATA), surprise thermal events, recycling lithium batteries, battery aging, rock content, cutoff voltage, battery sweet zone, stratification, faded, 2nd hand EV batteries used for stationary ESS and data science. For more excitement and to grow your brain and to increase your value as a human being, go to www.solarSEAN.com

In this episode Sean talks about virtual power plants, which is the aggregation of many small energy storage systems together to end up with the energy storage capacity of a large utility scale energy storage facility. This distributed energy storage, working in harmony with each other can provide many benefits to the grid and to consumers. To find out more about energy storage, PV and everything else, go to solarSEAN.com.

In this podcast, we will cover, C-rates, hour rates, E-rates, comparing lithium to lead-acid batteries, DOD, battery cells, modules and packs, series and parallel connections, cylindrical, prismatic and pouch batteries, cathodes, anodes, electron flow vs. conventional current direction, electrolytes and the graphite anode. To learn more, go to solarSEAN.com

This is the fourth and final part of an interview with Greg Smith of Sonnen Battery. In this podcast we cover Greg’s opinion against rapid shutdown (RSD) requirements of the NEC, a book he is writing, whole house backup and how fast a Sonnen can react to a grid outage, which is 100 milliseconds.   To find out more about everything solar and storage, go to solarSEAN.com

When you connect PV to Energy Storage, you have to decide if you are going to have them connected together via ac or dc electricity. There are benefits to each for different applications. We will talk about the nuances of ac coupling and dc coupling and give you the benefits and drawbacks of each.   To find out more and expand your knowledge, go to solarsean.com  

In this podcast, we will learn about the basics of electricity, from voltage to the speed of electricity. We will even get inside of the heads of Charles Coulomb and Henry Ampere. Did you know that 1A is about 6 x 10^18 electrons passing by in a second? And that that many electrons, besides being a lot is also called a coulomb and some batteries do charging by coulomb counting. How can anyone count that high?   For more interesting facts, listen to Sean's podcasts, go to solarsean.com and sign up for Sean's HeatSpring classes or hire him live!

In this series of Podcasts we are going to take an unbiased look at different popular Energy System Components. In this podcast we will cover Solar Generac/Pika, Sonnen, Solis, Sol-Ark, Fortress, KiloVault, Trojan Trillium, Rolls, Sunverge, Schneider, SimpliPhi, SMA, BYD and Victron. To find out more about Sean White, solar and energy storage classes, NABCEP exam Prep, books and customized projects, or even solar installations, go to solarsean.com

In this series of Podcasts we are going to take an unbiased look at different popular Energy System Components. In this podcast we will cover Solar Edge StorEdge, LG Chem RESU, Enphase and Tesla. In upcoming podcasts in this series, we will cover Generac/Pika, Sonnen, Solis, Sol-Ark, Fortress, KiloVault, Trojan Trillium, Rolls, Sunverge, Schneider, SimpliPhi, SMA, BYD and Victron. To find out more about Sean White, solar and energy storage classes, NABCEP exam Prep, books and customized projects, or even solar installations, go to solarsean.com

Upon finishing this podcast, you will forever remember the top three lithium-ion battery chemistries, which are LFP, NMC and NCA, also known as Lithium Iron Phosphate, Lithium Nickel Manganese Cobalt Oxide and Lithium Nickel Cobalt Aluminum Oxide. We will cover more about lithium batteries, such as including the definition of specific energy, which is energy per weight, rather than energy density, which is energy per volume. To learn more about solar and energy storage, classes and Sean White, go to solarSEAN.com!

Greg used to be the face of SMA America training and now is the face of Sonnen battery education in the US. This episode, we talk about energy storage self-consumption, energy storage without backup being common in Germany, PG&E public safety power shutoffs and demand for backup in the us, autonomy, ac-coupling, frequency control, module level power electronics, and some companies overestimating the shading losses with string inverters, which Greg is passionate about. To find out more about solar education and the easiest way to pass NABCEP exams, go to solarSEAN.com

In this part of my interview with Brian Hayden, we discuss drones, space, making online class content, how COVID effects the solar industry, a view of the solar industry stepping back and blurring out the ups and downs and what does good online training look like. To find out more about this podcast or HeatSpring online training, where Sean has now had 15k students sign up for his online classes, go to solarsean.com

This is a reading from the 2020 NEC of Article 705 Interconnected Power Production Sources, which features 705.11 Supply-Side Source Connections, 705.12 Load-Side Source Connections and the new in 2020 705.13 Power Control Systems (PCS). 705.13 is new and will be very useful for making interconnections, so that we are not limited by the options in 705.11 and 705.12. When we have very smart electronics coordinating the currents, such as with smart load centers, CTs and smart inverters, PCSs can make sure our busbars do not melt. Artificial Intelligence anyone? For someone who is just learning about PV or energy storage and has no idea about the NEC, this might be overwhelming, or at least a way to get familiar with the terminology while falling to sleep. For those of you that are familiar with the NEC, dive into island mode! For more information about Sean White, Solar and Energy Storage, such as online classes or hiring Sean to teach at your company for NABCEP credit, go to solarsean.com.

This week, we discuss the importance of software, artificial intelligence, controllable breakers, 2020 NEC 690.13 Power Control Systems, home automation platforms, blockchain, benefits to ac coupling, a 10,000 cycle warranty, Shell’s purchase of Sonnen and Shell’s renewable energy history. To find out more about Sean White’s, online classes or to hire Sean for live trainings for NABCEP credit go to www.solarsean.com.

Greg Smith is a micro-Celebrity in the Solar and Storage industry. He has been the top US technical training manager at two of the top German renewable energy companies. Sonnen is perhaps the most mature lithium ion company in the world that has just celebrated its 10th birthday. If you have been to a big solar show in the US in the last 10 years, you have passed Greg, probably with a crowd around him, as he is excited about the technology he espouses. This is part 1 of a series of podcasts with Greg. In this episode we cover Virtual Power Plants (VPPs), Lithium Iron Phosphate (LFP) Lithium-ion batteries, UL 9540 listing of complete Energy Storage Systems and what the inspectors sometimes look for. To find out more about Sean White, go to solarsean.com

This week we learn how HeatSpring came to be by two MBA candidates from Boston based Babson College’s entrepreneur program. Their recipe is to find the best instructors, who are SMEs that like to teach and many often write books. HeatSpring has been a success story. We also discuss Grid Alternatives, which is an organization that compliments online solar training very well and is often described as the Habitat for Humanity for solar, where people, including our students get free hands-on experience installing solar on real houses, and at the same time getting that feel good feeling for helping people in need get away from under their monthly electricity bills. To learn more about Sean White or his classes, go to solarsean.com

Brian Hayden discusses how HeatSpring started as an offshoot of two HS co-founders trying to get educated in renewable energy with the idea of becoming integrators. They were unsuccessful at finding the education they wanted, so they started HeatSpring, with the idea that they would get the best instructors in the world who are often authors. They would let the instructors use their own material and split the revenue rather than getting cheap instructors to make curriculum, teach classes and taking most of the profits for their organizations, google add-words and high pressure sales people, which is what they found in the industry. Sean learns in this podcast how HeatSpring started out with live trainings in Boston and evolved to go at your own pace 100% online education. Find out more about the “most excellent” free and not free HeatSpring classes at solarsean.com

Sean White gets interviewed as he was getting ready to interview Brian Hayden. They were having a conversation which fortunately was recorded where Brian Hayden, a podcaster himself seemed to be interviewing the interviewer. This part 1 of a multiple part series of conversations with Brian Hayden. Brian has a podcast of his own, which goes well with his Entrepreneurship course at the world renowned University of Michigan Center for Entrepreneurship. Brian's podcast is called Finding Your Venture and can be found at FindingYourVenture.com. To find out more about Sean, to sign up for his courses or to hire him, go to solarsean.com. Stay safe!

In this podcast, we go off on the EV manufacturers for not having a good enough excuse to let us connect our cars up for bidirectional purposes. Rather than blaming it on the warranty only being for 100,000 miles or 10 years, why not add 33,000kWh to the mix and then if you overused your battery powering your house, that could be another way for your battery warranty to expire. Bill picked 33MWh and if it is good enough for Bill, it is good enough for the EV industry.   Let's start a movement and agree to buy the first EV that offers this technology. We know they can all easily do it and it is not an engineering problem. Perhaps the battery industry is more interested in selling batteries for your car and your home separately. EV to grid is also known as V2G.   This podcast is part of a free class titled "Solar Building Codes, Fire Codes, EVs, Rapid Shutdown and Energy Storage Systems", which you can find the link to by going to www.solarsean.com

In this episode, we talk about 2020 NEC Article 625 Electric Vehicle Power Transfer System. It is ok with the NEC that we can use our cars to feed the grid and power our homes, so what is the hold up with the EV manufacturers? We will cover more of this answer in our next episode, but this time we will get into the details, and focus on 625.42 Rating, which will allow us to 4000A of EV chargers (and bidirectional EV Power Transfer Systems) on a 1000A feeder as long as we have the load management to make everything safe. 625.42 was the inspiration for 2020 NEC 705.13 Power Control Systems! You can also learn more about these topics in our online Heatspring classes, some of them free. Find your way there and to many good places at the address of solarsean.com!

The 2018 International Residential Code (IRC) now allows for 18 inches from the ridge instead of 3 feet. Bill was involved in the process of making these rules and explains how the 2018 IRC works. This is very important for those of you involved in rooftop solar markets in the US. In some states you can go all the way up to the ridge, other states you can go up to 18 inches from the ridge and yet in others it is 3 feet. With the price of solar PV so low, people are wanting to put as much PV as they can on their roofs, including on the north side. This podcast contains material from a recently released Heatspring free online class entitled: Solar Building Codes, Fire Codes, EVs, Rapid Shutdown and Energy Storage Systems. This free online course counts for 2 hours of NABCEP continuing education credits and prerequisites. You can find out more by going to www.solarsean.com.