Shopping Basket
Your Basket is Empty
Quantity:
Subtotal
Taxes
Delivery
Total
There was an error with PayPalClick here to try again
CelebrateThank you for your business!You should receive an order confirmation from Paypal shortly.Exit Shopping Basket

HeatSpring PV Course Blog

Blog

Determining low temperature that caused the inverter to go over voltage

Posted on 27 May, 2016 at 2:46

Q:

Sean: Thanks for a great course. Two questions: I think I would like some additional training for the PV Installation Professional Certification Exam. Do you have any recommendations?
Also with the addition practice questions, I got really knotted up on questions 74 and 78. On question 78, when you state the temperature coefficient for the module, is this actually Voc x Temperature Coefficient Voc?
Again, thank you for two great classes. I look forward to meeting you in person someday, and perhaps attending hands-on training you might offer.
My best to you

A:

For 74 and 78 we have to work backwards.

We are asked to determine the cold temperature and we are given the number of modules in series, temperature coefficient Voc and the inverter maximum voltage.

We first divide the inverter voltage by the number of modules to get the cold temperature voltage.

78 has a temperature coefficient that is in mV per C, so it is a little confusing, but simple once you see it.

145mV = 0.145V

We then find out the difference between the Voc at STC and the Voc at cold temperature.

Then we will divide that difference in voltage by 0.145V to get our delta T and then figure out how far our delta T is from 25C.

1000V/20 modules = 50V per module

50V cold Voc - 44V STC Voc = 6V is the difference in voltage

6V/0.145V = 41.4 Delta T

41.4 less than 25 is -16.4C

Isn't that cool!

Sounds like you are about done with the class.

This is the best class for preparing for the NABCEP PVIP exam and I think the best thing to do is go over this material a bunch.

I also teach workshops at Intersolar US in SF in July with Bill Brooks and at Solar Power International in September (Vegas) with Bill Brooks right before the NABCEP Exam. That would be a good way for you to get a chance and heckle me from the back row!

Also, there are other classes here at HeatSpring by other instructors, such as Ryan Mayfield https://www.heatspring.com/courses/megawatt-design?aff_id=t3nlgw

I have a NABCEP PVIP Prep course here too that covers a lot of the same material as this course.

Thanks!!!

Sean White

Categories: Advanced PV Course

Post a Comment

Oops!

Oops, you forgot something.

Oops!

The words you entered did not match the given text. Please try again.

318 Comments

Reply patrihaize
9:38 on 23 December, 2021 
d4f391380b . https://cdn.thingiverse.com/assets/88/bd/c0/1b/57/The_Curious_Cas
e_Of_Benjamin_Button_Full_Movie_Tagalog_Version_Tv5.html https://cdn.thingiverse.com/assets/10/55/71/fd/49/Ps2_Scph_10000_
Free_Mcboot.html https://cdn.thingiverse.com/assets/ee/93/6e/e0/41/fitzyile926.htm
l https://cdn.thingiverse.com/assets/8a/15/0a/c2/f6/azankebaadkidua
pdfdownload.html https://cdn.thingiverse.com/assets/80/0a/e4/b4/10/wyayan304.html https://cdn.thingiverse.com/assets/08/82/0b/ed/36/ullrhil509.html
https://cdn.thingiverse.com/assets/23/b7/a4/86/a1/Eyes-Wide-Shut-
1999-720p-BrRip-X264--YIFY.html https://cdn.thingiverse.com/assets/6a/93/10/7f/3a/Sarabhai_VS_Sar
abhai_X264_480pComplete_Series_harrylala.html https://cdn.thingiverse.com/assets/d7/32/8e/4c/93/laursae917.html
https://cdn.thingiverse.com/assets/1a/6e/8c/97/1d/Bang-Bang-movie
-1080p-download-torrent.html https://cdn.thingiverse.com/assets/96/72/ff/a1/3b/Reg_Code_Speede
r_Xp_14l.html https://cdn.thingiverse.com/assets/50/c9/2b/de/3d/tuckeunne713.ht
ml https://cdn.thingiverse.com/assets/0b/c5/33/4b/61/daryekaliq902.h
tml https://cdn.thingiverse.com/assets/d8/60/7a/ad/f2/mykragn621.html
https://cdn.thingiverse.com/assets/e2/2d/e8/a4/d4/rashgrayh50.htm
l https://cdn.thingiverse.com/assets/2e/4d/74/19/34/xforce_keygen_6
4bit_Revit_2011_download.html https://cdn.thingiverse.com/assets/a3/aa/54/2f/44/PointNMeasure-D
igital-Tape-W5746-U.html https://cdn.thingiverse.com/assets/96/89/79/d8/4b/Send_Blaster_Pr
o_Serial_Key.html https://cdn.thingiverse.com/assets/a2/74/44/c0/cc/adobe-photoshop
-cs3-keygen-activation-downloadinstmanks.html https://cdn.thingiverse.com/assets/b2/5f/c2/12/ad/airdroid_premiu
m_cracked_apk_store.html https://cdn.thingiverse.com/assets/dc/f1/10/77/b8/microsoft-hyper
v-network-switch-default-miniport-driver-windows-81-131.html https://cdn.thingiverse.com/assets/84/60/20/c2/fa/MercedesBenz_EP
Cnet_200801.html https://cdn.thingiverse.com/assets/e3/89/0c/e2/d8/cube_iq_4_0_ful
l_crackedgolkes.html https://cdn.thingiverse.com/assets/1c/19/56/f0/0a/corrhea413.html
https://cdn.thingiverse.com/assets/ec/8b/c9/09/6f/amz_recorder_so
ftware_free_12.html https://cdn.thingiverse.com/assets/65/f5/a9/4d/f8/charlben127.htm
l https://cdn.thingiverse.com/assets/68/08/b3/52/be/Tufos-Gratis-Co
ntos-Animados.html https://cdn.thingiverse.com/assets/62/14/76/12/6e/garwilso331.htm
l https://cdn.thingiverse.com/assets/47/a2/3c/1a/25/formulairetechn
iquegieckpdf.html https://cdn.thingiverse.com/assets/cd/4f/bf/4a/44/PHILIPS-VDO-Ren
ault-PRE-Code-CALCULATOR.html
Reply lyzageor
22:53 on 27 December, 2021 
fb6c851797 . https://coub.com/stories/2210184-v262r07dvrsoftware-latrieir https://coub.com/stories/2188500-enrique-iglesias-greatest-hits-3
20kbps-torrent-oleaeart https://coub.com/stories/2195225-xentry-developer-keygen-v110-dow
nload-top-15 https://coub.com/stories/2178799-phoenix-service-software-v2010-8
-4-41526-exe-linccolle https://coub.com/stories/2215926-wild-ball-nes-download-for-pc-na
zarwaine https://coub.com/stories/2200939-microelectronic-circuits-sedra-s
mith-6th-edition-solution-manual-torrent-348 https://coub.com/stories/2180506-boson-netsim-ccna-network-simula
tor-torrentl-link https://coub.com/stories/2173500-adobe-dreamweaver-cs6-12-0-with-
crack-portable-team-nanban-tpb-allyamade https://coub.com/stories/2212951-new-patched-free-dct3-codes-clie
nt-v13-epub https://coub.com/stories/2212150-__top__-1995-paris-sud-minuterar
https://coub.com/stories/2173532-sabki-bajegi-band-5-download-__f
ull__ https://coub.com/stories/2186004-keygen-zwt-para-adobe-8-12-marit
rish https://coub.com/stories/2191998-install-inventor-cam-2015-x64-32
x64bit-product-key-and-xforce-keygen-serial-key-keygen https://coub.com/stories/2186223-brahma-1994-mp3-vbr-320kbps-new https://coub.com/stories/2203422-upd-sonic-generations-graphics-c
onfi https://coub.com/stories/2179957-medicine-blue-book-willie-ong-pd
f-free-download-qualyva https://coub.com/stories/2199021-precalculo-james-stewart-3ra-edi
cion-pdf-100l-bernhesty https://coub.com/stories/2181737-fontexpert-2018-v15-2-crack-acti
vation-latest-version-hanwonny https://coub.com/stories/2188152-logiciel-crocodile-physique-grat
uit-francais-jaiuly https://coub.com/stories/2196756-musixmatch-lyrics-music-7-2-4-cr
acked-apk-exclusive https://coub.com/stories/2170224-the-secret-dual-audio-hindi-torr
entl-link https://coub.com/stories/2179275-giulia-roy-stuart-torrent https://coub.com/stories/2180121-__exclusive__-tanya-y157-videosl
https://coub.com/stories/2189839-fix-mediahuman-youtube-to-mp3-co
nverter-v3-9-8-12-2904-crack-rar https://coub.com/stories/2194816-christies-room-cheater-game-walk
throughl-_verified_ https://coub.com/stories/2167859-breakaway-audio-enhancer-serial-
crack-link https://coub.com/stories/2204805-regulator-savvy-by-pete-wolfinge
r-download-pdf-added-by-users-phylvan https://coub.com/stories/2185727-intuitquickbookspro2011fullcrack
torrent-verified https://coub.com/stories/2195477-minecraft-1-2-5-single-player-co
mmand-mod-download-install https://coub.com/stories/2193381-bitcoingeneratorv12zip