New to solar, I would like to learn how to do it the RIGHT way.... Fast learner.

[KillerWatts]

Again no Resistor is used, just a Hall Effect amp meter with a known light source. Manufactures use two test methods.

1. is the Isc test through a dead short with a special test lamp.
2. Is the Imp using the same test lamp through a MPPT tracking resistance which is dynamic and not a set value under computer control. You cannot duplicate the test with a fixed resistance.

All you can do is the Isc test and your results will be inconclusive because you do not know the input light level.

Ohhhhh, well, the most knowledgeable king's status has been updated to HELPFUL. Thanks, you really know your stuff! So now I am curious as to what you guys mainly talk about on here. Is it mainly system design, or new stuff in the industry orrrr? I don't want to be tooo off topic.

[RussN9ZP]

http://www.dowcorning.com/applicatio...0813&type=PROD
Dow Corning Chem PV-6010 MSDS Wonder what the PV might stand for, It CAN'T be Photo Voltaic 'cause "it wont work for that"!
Anyone besides our most helpful "King" have any tips on testing the cells and if a 0.15 Ohm resistor is required to do it right?

You want the correct answer or someone to tell you what you want to hear? You said yourself you wanted to do it right.

[Sunking]

So now I am curious as to what you guys mainly talk about on here.

As Joe Friday would say: Just the facts.

[KillerWatts]

You want the correct answer or someone to tell you what you want to hear? You said yourself you wanted to do it right.

I was just asking about the PV-6010 stuff that I already have and from what I understand this stuff is on a lot of the UL rated ones. And I guess that I should modify that statement to right-ish do to the fact that doing it "right" seems to involve a phone book,telephone, and a checkbook. That does not sound like very much fun, or like something I can afford to AC a wood shop.

[KillerWatts]

As Joe Friday would say: Just the facts.

Good deal! That's what I am after. Thanks again king!

[Sunking]

Thanks again king!

If you want to address me personally, my name is Dereck. I am not a Sir, Mr, or your king. Just plain ole Dereck

[KillerWatts]

Will do Dereck, thanks again!

[SolarWatt]

Hi Dereck
Can Killerwatts use the part: ACS712ELCTR-05B-T
from Allegro Microsystems ?
link: http://www.allegromicro.com/en/Produ...Cs/ACS712.aspx

Is is Hall effect current measurement component which can measure +/- 5A with resolution of 185mV/Amp

[SolarWatt]

Hello ... Is there anybody out there ???

[inetdog]

Hi Dereck
Can Killerwatts use the part: ACS712ELCTR-05B-T
from Allegro Microsystems ?
link: http://www.allegromicro.com/en/Produ...Cs/ACS712.aspx

Is is Hall effect current measurement component which can measure +/- 5A with resolution of 185mV/Amp

Hello ... Is there anybody out there ???

The sensor looks interesting. But its use will be limited to locations where you would normally be able to use a shunt and voltmeter combination, since it requires connection in line with the current being measured. I guess there might be some advantage of a lower voltage drop than a shunt, but the other problem in my mind is the limited current handling capacity. Beyond a certain point the current path will overheat and possibly damage the electronic part.

But their FAQ seems to cover that concern pretty well:

Steady state thermal testing with continuous DC (or AC RMS) current, based on Allegros ASEK712 demo board, shows that at an ambient temperature of 85°C the ACS712 can withstand a maximum of 40 A before reaching the maximum thermal junction temperature of 165°C.

And, no, there is nobody out here that I can see.