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EnergyUME
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UMD’s Maryland Energy Extension (MEE) delivers unbiased and research-based programming to facilitate sustainable energy decisions throughout the state.
This institution is an equal opportunity provider. Accommodation request, contact your local UMD Extension Office.
This institution is an equal opportunity provider. Accommodation request, contact your local UMD Extension Office.
How to design and configure code-compliant solar grounding
Learn how to design and configure code-compliant solar photovoltaic grounding.
⏱️Timestamps:
0:05 Intro
1:01 Overview
--- 1:14 National Electrical Code (NEC®)
--- 1:58 Grounding terminology [NEC 100]
------ 2:18 ground
------ 2:29 grounded
------ 2:47 grounding electrode
------ 3:43 grounding electrode system
------ 4:06 grounding electrode conductor (GEC)
------ 4:27 grounded conductor
------ 4:56 ungrounded conductor
------ 5:30 equipment grounding conductor (EGC)
6:22 Configurations
--- 7:46 System Grounding [NEC 690.41]
--- 9:54 Equipment Grounding [NEC 690.43]
--- 10:38 Grounding Electrode System [NEC 690.47]
16:15 Sizing
--- 16:38 EGC [NEC 690.45]
--- 18:48 GEC [NEC 690.47(B)]
20:31 Other videos and res...
⏱️Timestamps:
0:05 Intro
1:01 Overview
--- 1:14 National Electrical Code (NEC®)
--- 1:58 Grounding terminology [NEC 100]
------ 2:18 ground
------ 2:29 grounded
------ 2:47 grounding electrode
------ 3:43 grounding electrode system
------ 4:06 grounding electrode conductor (GEC)
------ 4:27 grounded conductor
------ 4:56 ungrounded conductor
------ 5:30 equipment grounding conductor (EGC)
6:22 Configurations
--- 7:46 System Grounding [NEC 690.41]
--- 9:54 Equipment Grounding [NEC 690.43]
--- 10:38 Grounding Electrode System [NEC 690.47]
16:15 Sizing
--- 16:38 EGC [NEC 690.45]
--- 18:48 GEC [NEC 690.47(B)]
20:31 Other videos and res...
Просмотров: 4 822
Видео
How to ensure safe and effective solar grounding
Просмотров 26 тыс.Год назад
Learn how to ensure safe and effective solar photovoltaic grounding. ⏱️Timestamps: 0:06 Intro 1:13 Electrical reference 1:35 Zero volt reference 3:15 Phase voltage 3:40 Ground fault 4:05 Ground fault 5:52 Shock hazard 6:52 Ground fault path 8:45 Ground fault protection 10:02 External high voltage 10:20 Lightning protection 12:13 Arc and side-flash 12:43 Lightning path 13:23 Auxiliary electrode ...
How to wire off-grid and grid-tied solar inverters
Просмотров 38 тыс.Год назад
Learn how to wire and connect off-grid and grid-tied solar inverters. ⏱️Timestamps: 0:06 Intro 0:51 Reviewing a simple off-grid system 1:42 Battery connections 2:30 Solar connections 3:33 Small DC load connections 3:41 Charge controller settings 4:19 Connecting an off-grid inverter 4:47 Wires to the inverter 5:14 Fusing the positive 6:11 Wires to the battery 6:52 System overview 7:17 Connecting...
How to select and install a solar disconnect switch
Просмотров 28 тыс.Год назад
Learn how to select and install an a disconnect switch for your solar electric system. ⏱️Timestamps: 0:06 Intro 0:41 What is a disconnect switch? 1:18 DC disconnect 2:11 AC disconnect 2:33 Purpose 3:30 3:30 How to select a disconnect 3:30 Fused & unfused 4:29 Ampacity ratings 5:07 Fuse size calculations 7:12 Enclosure ratings 7:40 Locking security 7:52 How to install a disconnect 8:08 Location ...
How to size and select a solar inverter
Просмотров 27 тыс.Год назад
Learn how to size and select an appropriate inverter for your solar electric system. ⏱️Timestamps: 0:06 Intro 0:38 What is an inverter? 1:01 Electrical current 1:56 DC & AC power 3:58 Inverter waveforms 6:43 How to select an inverter 6:48 Types of inverters 8:12 Common features 10:28 Safety protection features 10:53 Idle consumption 11:24 Inverter efficiency 11:40 How to size an inverter 11:47 ...
Solar On The Farm Webinar
Просмотров 1,2 тыс.2 года назад
University of Maryland (UMD) Extension Specialists and industry representatives discuss opportunities for farms and businesses with an interest in solar electricity. Learn about the opportunities, challenges, and practical applications of solar energy in Maryland. The webinar covers important topics to help you decide if solar is right for you, and how you can install a solar electric system th...
How to wire a solar charge controller and battery bank
Просмотров 95 тыс.2 года назад
Learn how to wire a solar charge controller and battery bank for your solar electric system. ⏱️Timestamps: 0:06 Intro 0:34 What is a battery bank? 0:42 Nominal battery voltage 1:02 Series configuration 1:27 Parallel configuration 2:02 Improper connections 2:43 How to wire the system? 3:05 Controller ↔ Battery 5:57 Controller ↔ Motor 7:13 Controller ↔ Solar 10:03 Completed system 10:28 Other vid...
How to select and size a solar charge controller
Просмотров 144 тыс.2 года назад
Learn how to select and size a solar charge controller for your battery-integrated solar electric system. See how charge controllers work and explore the differences in PWM and MPPT controllers ⏱️Timestamps: 0:06 Intro 0:40 Why are charge controllers needed? 1:05 Nominal battery voltage 3:15 Battery charging stages 4:12 Types of controllers 4:21 PWM controllers 5:43 MPPT controllers 7:15 Compar...
How to design and size a solar battery system
Просмотров 137 тыс.2 года назад
Learn how to calculate the battery capacity, or battery size, for your solar electric system. ⏱️Timestamps: 0:06 Intro 0:53 Why are batteries needed? 1:10 What batteries are available? 1:40 What is the useable energy? 2:16 What is the battery longevity? 3:06 How to assess your energy demand 5:57 How to estimate system losses 6:23 round trip efficiency 7:07 wiring losses 7:32 conversion efficien...
How to wire different sizes of solar panels together
Просмотров 108 тыс.2 года назад
Learn how to wire different sizes of solar panels together using different combinations of series and parallel configurations. ⏱️Timestamps: 0:06 Intro 0:49 Same panels in series configuration 2:12 Same panels in parallel configuration 3:29 Same panels in mixed configuration 4:37 Same panels but inefficient design 5:58 Different panels in series 7:36 Different panels in parallel 8:45 Different ...
How and why to wire solar panels in parallel
Просмотров 146 тыс.2 года назад
Learn how and why to wire solar panels in parallel. ⏱️Timestamps: 0:06 Intro 0:51 Current and voltage 1:51 Benefits with damaged or shaded panels 3:08 Downside of high current and low voltage 4:13 Overview of wire connections 5:15 Parallel connections with branch couplers 8:43 Parallel connections with combiner boxes 11:15 Measuring voltage and current 12:43 Other videos and resources For more ...
How and why to wire solar panels in series
Просмотров 57 тыс.2 года назад
Learn how and why to wire solar panels in series. ⏱️Timestamps: 0:06 Intro 0:53 Current and voltage in series 2:16 Shaded or faulty cells in series 2:58 Reviewing bypass diodes 3:43 Impact of shading in series 5:10 Advantage of series connections 5:58 Nominal voltage requirements 6:41 Mismatching voltage in series 7:04 Wiring panels in series 9:07 Positive and negative output and extension wire...
How to wire a solar combiner box or pass through box
Просмотров 37 тыс.2 года назад
Learn how to wire a pass through box or a combiner box for your solar electric system. ⏱️Timestamps: 0:06 Intro 0:42 Reviewing pass-through and combiner boxes 2:35 Reviewing over current protection 3:13 Importance of electrical enclosures 4:14 Reviewing PV wires and safety 5:22 Cutting and stripping PV wire 5:38 Selecting an electrical enclosure 7:21 Installing strain reliefs and wiring 7:56 Fu...
How to wire a solar junction box and assemble PV cables
Просмотров 25 тыс.2 года назад
Learn how to repair, replace or rewire a solar junction box, as well as how to assemble PV wire for the rest of your solar electric system using MC4 connectors. ⏱️Timestamps: 0:06 Intro 0:33 An overview of junction boxes 0:46 Cutting and stripping PV wire 1:22 Connecting PV wire in a junction box 2:51 Introduction to MC4 connectors 3:13 Components of an MC4 connector 3:29 Positive and negative ...
How to navigate renewable energy options
Просмотров 2442 года назад
Learn about Maryland's energy supply and explore some renewable energy options for your home during this segment from our Home Energy Webinar series.
How to implement energy efficient landscaping
Просмотров 3962 года назад
How to implement energy efficient landscaping
How to size wires and fuses for a solar electric system
Просмотров 34 тыс.2 года назад
How to size wires and fuses for a solar electric system
How to navigate heating and cooling options
Просмотров 2262 года назад
How to navigate heating and cooling options
How to size and evaluate heating and cooling systems
Просмотров 2032 года назад
How to size and evaluate heating and cooling systems
How to read your electric utility bills
Просмотров 7122 года назад
How to read your electric utility bills
How to estimate the size of your solar electric system
Просмотров 6 тыс.2 года назад
How to estimate the size of your solar electric system
How to perform a site assessment and shading analysis for solar
Просмотров 6 тыс.2 года назад
How to perform a site assessment and shading analysis for solar
How to perform a load assessment for a solar electric system
Просмотров 4 тыс.3 года назад
How to perform a load assessment for a solar electric system
Please how do you identify an MPPT charge controller.
Excellent Videos
I'm curious that if I ground my roof mounted solar array, doesn't that create the potential to attract lightning to the higher grounded point now?
How do I hookup my 2 series strings to those switches? Do I ignore the 3rd pole?
TLDR: Use the same panels.
My panel have low amps 2 diodes reading and 0.971 how I should know if the functioning properly
Grounding systems are a blessing and a curse. They are a blessing because if a piece of equipment in your house fails you are much less likely to have enough current flow through your heart. They are a curse in that they actually make your home a more susceptible to damage from a lightning strike NOT less. If a lightning bolt strikes the physical Earth in your neighbor's backyard there is a MUCH higher chance of that voltage coming back up through the the grounding system than not. During a lightning event my home would be better served if I could implement an isolation switch temporarily isolating my system from the earth ground. The problem is I would probably forget to put it back to normal after the storm passed. Also, in the unlikely event that I would also have an equipment failure inside my house I would not be protected from electric shock. The truth is: MOST LIGHTNING DAMAGE ENTERS THROUGH THE GROUND SYSTEM. THE GROUNDING SYSTEM DOES NOT PREVENT DAMAGE FROM LIGHTNING IT OPENS A BACK DOOR ALLOWING IT TO HAPPEN.
It's an excellent explanatory video. Thanks!
100w is so 2019, we got 64w panel in 2000, took long time to go over 400w, they had solar panels in 1924
This makes no sense
On the Ball 👍
😀👍
I'm always so impressed with electricians' ability to quote and cite code off the top of their heads. Wish I could quote the Bible with that kind of alacrity.
such a nice explanation
Question: Is having a higher output voltage solar panel pointless in a 12V battery charging system? The one I'm looking at is 475W and 40 something voltage. Is that extra voltage "wasted" because the charge controller reduces it anyway?
Hello, DoI need separate earth rod for dc and ac in case of a solar system installation?
Thanks for the education. Are you still available for a solar RV question?
What was the wire size or gauge used to connect the controller to the battery?
ruclips.net/video/iYYqpgTNav0/видео.htmlsi=W4eRvqHy5ulLR8Yr
Excellent video, but I would also like to see the solution to be applied in case of necessity. For example, I have panels of the same model and specifications. due to space limitations, I have to mount them in 3 areas of different sizes. I want to place the maximum number of panels in each area. In this case, 3 different strings will generate electricity at 3 different output voltages/amps. Can I connect these 3 strings to the mppt after making parallel connections in the combiner box? Or in such a necessity, considering the minimum cost and maximum efficiency, what would be your solution?
Is 5565kwh the annual energy demand or daily? I guess the design should be based on dsily demand
thanks
how to conect solar 480w to selirs
Iam confused! Why can't you just wire all of them in parallel and let the voltage intact? If all the panels have the same voltage and u wired in parallel ur simply adding up the amperage and leaving the voltage the same, thus aswell getting 100% output! But u never mentioned that way, why?
I WILL SUBSCRIBE AND LIKE
EXCELLENT
What about the C-rate of the batteries??? Is this also critical in sizing your batteries??
How to standard IEC using to calculate that?
do you help ppl with there setup?? mine has been runing for 2 years,, but i would like some one ales to look at it cose it might be wrong..
As usual..the BEST.....
most informative video on grounding. watched few times to fully grasp everything. thanks
Grounding systems are a blessing and a curse. They are a blessing because if a piece of equipment in your house fails you are much less likely to have enough current flow through your heart. They are a curse in that they actually make your home a more susceptible to damage from a lightning strike NOT less. If a lightning bolt strikes the physical Earth in your neighbor's backyard there is a much higher chance of the voltage coming back up through the the grounding system than not. During a lightning event my home would be better served if I could implement an isolation switch temporarily isolating my system from the earth ground. The problem is I would probably forget to put it back to normal after the storm passed. Also, in the unlikely event that I would also have an equipment failure inside my house I would not be protected from electric shock. The truth is: MOST LIGHTNING DAMAGE ENTERS THROUGH THE GROUND SYSTEM. THE GROUNDING SYSTEM DOES NOT PREVENT DAMAGE FROM LIGHTNING IT OPENS A BACK DOOR ALLOWING IT TO HAPPEN.
I ordered chep PWM 30A controller from alliexpres. Will use it to charge old 12V, 45Ah card battery. Plenty of cheap used solar panels locally, but all of them are have Voltages over 35V, some over 100V. Aliexpress charger is rated 30A and to be used with max 25V panels with 12V battery, and max 50V with 24V battery. I wan to use 180W(Peak Power) panel, Voltage (Vpm) = 36V Current (Ipm) = 5A. So if I use this 180W panel with that PWM controller and one 12V battery. Will I damage the battery, controller or only get very bad efficiency at 5A x 12V = 60W, that is 33% from the 180W panel? Since the panel costs 15$ and I have space for it in my project, I dont care for the loses, I only care if it will charge at all and not damage battery or controller.
I like how you explain things. I have to fast forward thru so many videos just to get what I was looking for. You define what function your going to teach, then it's off to the races! No wasted time, very efficiently done.
I am struggling how to connect old 400x8 Watt (40 v, 10 amp) panels to new 580x3 watt (48V, 15amp) pannels.
i hope you read the comments here as i have some disturbing info for you..The first ad to pop up from utube on your vid here was about a dual belt drive generator scam and the guy in it stresses not to buy solar.Your vid was educational and just what i needed to sort out a problem.The scam ad should be reorted but it wont let me on my end.
Merci à vous pour ce tutoriel très explicatif...
Ok. Why did you change the current and voltage ratings of the 50 watt panels? I was waiting to see how to combine them with the 15 volt 3.3 Amp rating you showed earlier.
Thanks.. But a doubt: 7:00-7:10 part. You say while in series, the current shall be limited to 2.5A! My doubt is, when the sunlight falling on the 5A panels is capable of producing 5A and the load is capable of eating out the 5A, won't the 5A current flow through the 2.5A panels resulting heating up and damaging them??🤔 Please clarify 🙏
I’ve never heard an electrician, technician or anyone else actually try to pronounce AWG as a “word”. (I’m a military drone tech, amateur radio operator and avionics tech and no one has ever said AWG as “Og”.)
Lot of the solar coding requires on a DC setup side to have the neutral (negative)wire hooked up to the switch now. You can't wire nut it or buss bar it
I like it
Hey I found a link to a little trick that makes it easier to get that number for wire into the terminal. ruclips.net/video/6IfeqswEm94/видео.htmlsi=VNxsaldEB5IGUFCQ
sir please help me, 3:55 The data I have in the "SI_EF_TILTED_SURFACE_OPTIMAL_ANG" section shows ANN -999.0. how can i get the correct value? Thank You. my coordinate -6.924497, 108.461269 sir please help.
Thanks for the video. Are you saying that there should be a grounding system on the roof that covers the perimeter of the solar panel array, and that should be connected to its own copper rod in the ground? The frames of the panels themselves should then all be tied together and be presented to the earth terminal in the solar controllers or if using a solar inverter, to the inverter itself? I am completing a 40ft catamaran which has a 6kw solar panel array, two 10kw solar inverters, two 45kwh LiPO4 lithium battery banks and two 15kW electric outboard motors. I will be running the two hulls independent of each other, with 3kW of solar going to each solar inverter. I was thinking of doing four spike charge dissipators at the corners of the catamarans roof which would be linked together with 70mm2 cable. During weather that posed a risk of a lightening strike, I was going to then fit 4 removable large copper cables which would be attached to the spikes and draped into the water. None of this grounding would be attached to the frames of the solar panels, but would be to try to keep the charge of the localised sea area and the surrounding air above it, at an even voltage thereby reducing the risk of attracting a lightening strike. The cat is a solar cat so no mast to worry about. Does that solution sound likea good idea?
Wtf if I’m looking to see what size controller I need I don’t need cave man explanations as to what they are.
Excellent. Now, why do the PV installers not run a ground from the ground mount, via the wiring trench, to the ground rod which is going to be near the entrance panel/meter base?
Your a good teacher in a clear way
Great video! Just what I was looking for, a clear explanation of the different types of combinations of PV panels. Greetings from Argentina.
The best video that analyze this topic. Thanks
How much to do a zoom call and give me some advice?