Re: [RE-wrenches] Sanyo HIT module diode issues

Thanks Dave, We have installed many systems and we only had this problem with Sanyo modules and we had a rash of these crop up about the same time-frame and the issue only affected part of the array. Panasonic denied our claim because they stated it was a lightning strike. The cause is

Re: [RE-wrenches] Sanyo HIT module diode issues

Yes I did Brian, with and without the diode. That's how I found what I thought was a bad diode. On Thu, Jul 6, 2017 at 4:21 PM, Brian Mehalic wrote: > Did you test the voltage of the individual cell banks in the module with > the diodes out? > > > Brian Mehalic > NABCEP

Re: [RE-wrenches] Sanyo HIT module diode issues

The diode check on a dvm is useful but may not show a diode breaking down at higher voltage. Yes lightning can open up the tabs or connecting foil inside a solar panel. It can do alot more than that! One of the best reasons for using an SPD at the array is also preventing the latent damage that

Re: [RE-wrenches] Sanyo HIT module diode issues

Did you test the voltage of the individual cell banks in the module with the diodes out? Brian Mehalic NABCEP Certified Solar PV Installation Professional™ R031508-59 520.204.6639 Solar Energy International http://www.solarenergy.org SEI Professional Services http://www.seisolarpros.com On

Re: [RE-wrenches] Sanyo HIT module diode issues

Hi Brian, Thanks for the info. Yes I tested the diode properly. I was concerned that I needed to test the diode under a load to get a valid test. Taiyoko On Thu, Jul 6, 2017 at 4:14 PM, Brian Mehalic wrote: > Did you use the Diode Test function on the meter? If the

Re: [RE-wrenches] Sanyo HIT module diode issues

Did you use the Diode Test function on the meter? If the diode is good you should see around 0.4-0.8 V in the forward bias, and OL in reverse. If it is bad (open) you'll get OL in both directions, and if it is shorted closed you'll get the 0.4-0.8 V reading in both directions. Shorted closed