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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.
How to ensure safe and effective solar grounding
15:56
10 месяцев назад
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Комментарии
@oogie-boogie
@oogie-boogie 18 часов назад
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..
@shermanramsingh7898
@shermanramsingh7898 День назад
As usual..the BEST.....
@user-dl8qm7ri3o
@user-dl8qm7ri3o День назад
most informative video on grounding. watched few times to fully grasp everything. thanks
@Janisg616
@Janisg616 День назад
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.
@centsforhumor4265
@centsforhumor4265 2 дня назад
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.
@TheConceptAcademy
@TheConceptAcademy 3 дня назад
I am struggling how to connect old 400x8 Watt (40 v, 10 amp) panels to new 580x3 watt (48V, 15amp) pannels.
@andremaier5816
@andremaier5816 5 дней назад
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.
@rhumb
@rhumb 12 дней назад
Merci à vous pour ce tutoriel très explicatif...
@AlternativePower903
@AlternativePower903 15 дней назад
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.
@PKSDev
@PKSDev 18 дней назад
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 🙏
@marknichols7861
@marknichols7861 25 дней назад
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”.)
@solarhomesteadinstalls
@solarhomesteadinstalls Месяц назад
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
@thomasnkhwazi5577
@thomasnkhwazi5577 Месяц назад
I like it
@RaymondNoud
@RaymondNoud Месяц назад
Hey I found a link to a little trick that makes it easier to get that number for wire into the terminal. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6IfeqswEm94.htmlsi=VNxsaldEB5IGUFCQ
@abrallianadam
@abrallianadam Месяц назад
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.
@alanbutterworth4219
@alanbutterworth4219 Месяц назад
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?
@fat_basturd5345
@fat_basturd5345 Месяц назад
Wtf if I’m looking to see what size controller I need I don’t need cave man explanations as to what they are.
@flyingjeff1956
@flyingjeff1956 Месяц назад
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?
@chigozieogbonnaya8713
@chigozieogbonnaya8713 Месяц назад
Your a good teacher in a clear way
@NatacionAle
@NatacionAle 2 месяца назад
Great video! Just what I was looking for, a clear explanation of the different types of combinations of PV panels. Greetings from Argentina.
@SalahBinTaleb-re1di
@SalahBinTaleb-re1di 2 месяца назад
The best video that analyze this topic. Thanks
@andrewgivens5070
@andrewgivens5070 2 месяца назад
How much to do a zoom call and give me some advice?
@jameselliott9397
@jameselliott9397 2 месяца назад
Something every mismatch solar panel video fails to mention is the Diodes. The lower value diodes in smaller panels must be changed to the value of the diodes your highest output panel .
@mathematician6500
@mathematician6500 2 месяца назад
need the whole formuala in pdf form pleas
@joshuapitong899
@joshuapitong899 2 месяца назад
Thank you Sir.
@jamieharland9080
@jamieharland9080 2 месяца назад
well, done I'll have to go over it a few times as i am getting it in my thick head. sometimes i get more the second time remembering electricity kills. Can never be dilly Dalling around with any type of voltage thanks for your time.
@Ben-ww1zq
@Ben-ww1zq 2 месяца назад
So I have 25-year-old solar panels and they don't have diodes so I think you've just cleared me in to why my system continues to test low, plus I was testing on DC which I thought was accurate and getting a low reading so thank you for pointing that information out I love how in-depth you are
@bobbyhoggatt9787
@bobbyhoggatt9787 2 месяца назад
Looks like a older spider man
@Success-LuckTV1
@Success-LuckTV1 2 месяца назад
Thanks so much for the video
@jussikankinen9409
@jussikankinen9409 2 месяца назад
Does 230v fuse work 12v system
@paulverschueren4379
@paulverschueren4379 2 месяца назад
Very interesting video Congratulations Sir
@hiangela4706
@hiangela4706 2 месяца назад
This is wild, never thought adding a panel would hurt the efficiency of the system. Thank you for info!
@9jmorrison
@9jmorrison 2 месяца назад
I think it is important to consider the length of the run of wire, and the purpose/inverter used. Lower voltage can be better for batteries and higher voltage for a grid tie inverter.
@joshuapitong899
@joshuapitong899 2 месяца назад
Amazing discussion. Thanks a lot Sir
@joshuapitong899
@joshuapitong899 2 месяца назад
Thank you so much.😊
@ronsbeerreviewstools4361
@ronsbeerreviewstools4361 2 месяца назад
Thank you for posting a educational video.
@RadiationNetwork
@RadiationNetwork 2 месяца назад
In the last diagram with the 5 panels you could have wired them for 40V 10A with 400 watts and 100% array efficiency. 40V 5A for two 100watt panels in series. Then the one 100watt in series with the two 50W panels but those 50W panels would be in parallel so they combined would equal a 100W 5A panel. They could have also be wired for 80V 10A for 400W and 100% array efficiency. In both configs just imaging turning the two 50W 2.5A panels into one 20V 5A panel then wiring the rest up. Also your wiring on the last diagram would likely burn out the two 50W panels. You're trying to connect a 60V 5A strand to a 40V 2.5A strand that would likely burn out the smaller 50W panels. The voltage and current cannot be mismatched in this manner when connecting in series or parallel. In series, the current has to be the same through both strands, which isn’t the case here. The panels wired to produce 40V, 2.5A cannot handle the 5A current that the 60V strand can handle, which could indeed lead to the lower-rated panels being damaged or burned out. In parallel, the voltage across both strands has to be the same, which also isn’t the case here. Therefore, connecting these two strands as depicted would likely cause failure in the lower-rated panels due to overcurrent. The appropriate method is to match panels with the same ratings in series and the same in parallel to prevent any damage and ensure proper functionality.
@edkemp6287
@edkemp6287 2 месяца назад
Avoid parallel. String is king
@jackdolphy8965
@jackdolphy8965 2 месяца назад
Avoid EdKemp. Context is king.
@elizabethbigley1596
@elizabethbigley1596 2 месяца назад
Perfect thanks for breaking it down with your simple examples.
@jws3925
@jws3925 2 месяца назад
Where did you get 300 volts from in your formula at the 10:20 mark? If the panels are in parallel, which in you example they are since the amps of each panel are added together, the voltage of the three panels together should remain the same which according to the label on the back of the panel in your example the open circuit voltage is 21.2v (at the 6:12 mark). So, the voltage (the bottom number) in your formula at the 10:20 mark should be 21.2 not 300! The only way you could get 300 would be to add the wattages of all three 100 watt panels. That would give you 300 but, of course, that would not be voltage which your formula calls for. Can you explain where I have misunderstood or your example is wrong? Because, I am confused. thank you PS: All that talk about the inverter etc. does not apply to my application because the panels feed a charge controller which, in turn, feeds my LifePO4 battery.
@AJTarnas
@AJTarnas 2 месяца назад
could you make a video or describe what to do for an off-grid solar PV + battery (not-grid-tied, no-grid) situation?
@perfectcs9759
@perfectcs9759 3 месяца назад
Thank you for this is what I need, just tested my 50w panel today as you explained it showing me 2.3A on the sun seems to me ok
@KieranFarnes
@KieranFarnes 3 месяца назад
Hey, thanks for the video. We live in a rental property in the UK and I'd like to put a panel/some panels on the balcony. Given that we rent and the panels would be visible from the street (and I haven't exactly asked the landlord) I'm looking at keeping my system as low key as possible. To that end, I'm debating multiple smaller panels in parallel (5x20w panels maybe?) rather than 1x100w panel. Rather than using a whole bunch of MC4 connectors, my idea is to run positive and negative "bus" cables all the way from the battery to the furthest away panel and then have each of the other panels on the way wired directly into the "bus" cables. I know I would have to use the right size cable to handle the combined current, but can you see anything obviously wrong/dangerous with that? Thanks in advance.
@samfish6938
@samfish6938 3 месяца назад
wire nuts will burn at 100 amps
@aloksharma8117
@aloksharma8117 3 месяца назад
Hi, do you provide services like inspection of solar system for a fee?
@spicemasterii6775
@spicemasterii6775 3 месяца назад
This is the best video on the topic
@spicemasterii6775
@spicemasterii6775 3 месяца назад
That electric bill must be from a hot place
@wjjohns04able
@wjjohns04able 3 месяца назад
Why does the multimeter dance around when no load is connected to it?
@edkemp6287
@edkemp6287 2 месяца назад
Cheap meter. Use analogue meter or fluke
@rticul8862
@rticul8862 3 месяца назад
In your last example, would i be correct in assuming that adding two more of the 50 watt in series with the other 2 50 watt panels, your efficiency would go back up to 100%? Great video by the way!
@RadiationNetwork
@RadiationNetwork 2 месяца назад
He could have just connected the two 50W panels in parallel first to form a single 20V 5A panel. Then he could have made a 80V 5A series panel or a 40V 10A series parallel setup or all in parallel for 20V 20A. All setups would have a 100% system efficiency. Also the guy does not know his stuff. You never connect a 60V 5A string of panels in parallel to a 40V 2.5A string of panels. You would overcurrent the lower voltage lower amperage panels and likely burn them out.
@mikenetherlin6912
@mikenetherlin6912 3 месяца назад
Thank you for your time I learned a lot