[RE-wrenches] Just getting old?

[chris at OasisMontana.com]

We haven’t sold these modules, but here’s some information:  https://www.mitsubishielectricsolar.com/warranty-information/
 
Good luck!
 
Chris Daum
Oasis Montana Inc.
406-777-4309 or 4321
406-777-4309 fax
www.oasismontana.com <http://www.oasismontana.com/>  
 
 
From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Bill Battagin via RE-wrenches
Sent: Monday, May 22, 2023 1:25 PM
To: Darryl Thayer via RE-wrenches <re-wrenches at lists.re-wrenches.org>
Cc: Bill Battagin <frenergy at psln.com>
Subject: [RE-wrenches] Just getting old?
 
I went back to this array, removed all J-box covers and tested for Voc.  The majority of the PVs were ~ 9.5Voc, about 5 were ~19 Voc, 3 were 0 (that's zero) Voc .  The diodes are in an encapsulant.  The label says Voc = 22V. Another array of Mitsubishi panels takes a dive.
            Anybody have contact info for them or recent experience with their warranty?
Thanks,
Bill
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.(shipping)
5575 Genesee Rd. (USPS, UPS)
Taylorsville, CA 95983
530.284.1925 Office/ 530.258.1641 Cell
CA Lic 874049
Solar powered since 1982
On 5/17/2023 10:25 PM, Darryl Thayer via RE-wrenches wrote:
Was the inverter connected at the time of testing?  If so I suspect the inverter is loading the solar array below Vmp
 
On Wed, May 17, 2023 at 11:23 PM frenergy via RE-wrenches <re-wrenches at lists.re-wrenches.org <mailto:re-wrenches at lists.re-wrenches.org> > wrote:
Wrenches,

             I've got a call from a customer that said their (my 
install) 17 year old GT system went dead. Basic stats: 23, Mitsubishi 
PVMF120EC3, label says V mpp= 17.6V and Voc = 22 V; top-of-pole; SMA 
SB3800U. Its one string of 23 PVs.  Full sun, 75 degrees ambient during 
testing. When I checked DC voltage at the inverter landings I got ~23-29 
volts (fluctuating) same at the input side of the DC switch.  These 
panels have the old gasketted 4-screw covered J-boxes and screw 
terminals inside, I removed the covers from three panels and got 9.5 
volts at the each of the panels' screw terminals,  all the wiring 
outside the boxes checks out.

             The system had been functioning normally 3 weeks prior. I 
could check voltage at more panels I guess.  Ideas?

Bill

Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.(shipping)
5575 Genesee Rd. (USPS, UPS)
Taylorsville, CA 95983
530.284.1925 Office/ 530.258.1641 Cell
CA Lic 874049
Solar powered since 1982


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