re-sealing cracked modules [RE-wrenches]

[Jerry Caldwell]

Good point Bill,

I hadn't thought about the ramifacations if this were
a  high voltage system.  Nominal array voltage is 48v
- more specifically, eight ASE DG300 50v modules all
wired in paralell on one of the old Trace SW style "PV
series" inverters with the big blue capacitors on the
DC side in lieu of a battery bank.

This customer had been entertaining the possibility of
rewiring the array in series and replacing the
inverter with a Sunnyboy.  I'll make sure to advise
him on the safety issues regarding this.

Jerry

--- Bill Brooks <bill at brooksolar.com> wrote:

> Jerry,
> 
> You provide no indication of system voltage. A
> broken ASE-300 will work, and
> you can play around with it if the voltage is low
> enough (no more than 48V
> nominal). Higher voltage systems is totally playing
> with fire. The most
> likely place for a fault is through the edge to the
> frame, no amount of
> sealing will deal with this issue.
> 
> I don't have a problem with Doug's Real Goods
> recommendation to try to fix a
> module for a low voltage system of 12 or 24 Volts
> (48V is getting to the
> edge of safety). I do have a problem with making
> general recommendations
> without knowing a lot more about the situation. The
> dude with the BB gun
> just made a $1500 mistake. That's a lot of allowance
> money to pay back.
> 
> Bill.
> 
> 
> 
> -----Original Message-----
> From: Jerry Caldwell [mailto:solarcowboy at yahoo.com] 
> Sent: Friday, July 01, 2005 3:55 PM
> To: RE-wrenches at topica.com
> Subject: re-sealing cracked modules [RE-wrenches]
> 
> 
> Wrenches,
> 
> I have a customer whose ASE double glass 300 w
> modules
> mounted on Zomeworks trackers have been shot by a bb
> gun.
> 
> The glass on two of the modules has cracked and the
> customer wants to know if there is a way to re-seal
> the modules to prevent moisture and corrosion from
> entering the encapsulated area.
> 
> Does anyone on list know of a decent way to
> accomplish
> this?  I know they'll never be the same, but any
> help
> would be appreciated.
> 
> Jerry Caldwell
> NABCEP Certified PV Installer
> Light Energy Systems
> 965 Detroit Ave
> Concord, CA 94518
> 
> 925-680-4343 office
> 510-205-2798 mobile

Jerry Caldwell
NABCEP Certified PV Installer
Light Energy Systems
965 Detroit Ave
Concord, CA 94518

925-680-4343 office
510-205-2798 mobile


		
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