[RE-wrenches] Need some help

[Dave Angelini Offgrid Solar]

Apologies! I missed the PV-10208 model for Trace....  

Dave Angelini
Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [1]
e-mail offgridsolar at sti.net
[2]
text 209 813 0060

On Sun, 6 Jun 2021 09:07:53 -0700, Blake Gleason 
wrote:  All of the "PV" Series inverters we installed from Trace/Xantrex
required external isolation transformers. That is, most smaller string
inverters of that era had built-in iso transformers, but the PV series did
not. Remember that the DC negative is grounded.   I suppose it's also
possible that the gas station service is 480V, in which case the iso
transformer would also (in addition to isolation) serve the purpose of
converting from 208 to 480V.   It's possible everything was still working,
but probably won't be for long!

 Blake Gleason, PE
Director of
Innovation
& Technical Excellence
Sun Light  border-left: 1px #ccc solid;
padding-left: 1ex;">   

 Good morning fellow wrenchers, need some help
from those of you that have a bit more tenure than I do. Was called to look
at a site yesterday that is down due to renovations. It is a gas station
that has 20 KW worth of solar on the canopy, two Trace PV-10208's and two
transformers, one on the output of each inverter. The system was shut down
during a large renovation, wires cut and sort of lost under the pavement
during the work. We have a good idea where we can dig to locate the conduit
for AC but my dilemma is the equipment on the canopy. The owner has no idea
how old the system is and if it was actually working prior to the reno. 


Getting AC back up and running to the canopy may be the easy part, I need
to understand why there is a transformer along with the Trace inverter and
how have these inverters held up for 20 + years and based on layout if
needed can I replace inverter with current tech without rewiring the whole
canopy ( 264 BP 85 watt panels, wired to combiner box then out to inverters
). Power supply at gas station is 208. So, please and thank you in advance,
any and all help, guidance and ideas greatly appreciated.  

Thank you


Peter Giroux 

American Solar "> 

Roswell Ga 

678 525 0468  
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