[RE-wrenches] Solectria TL woes

[Jason Szumlanski]

It sure looks like it could be an AC voltage issue. Around here the utility
voltage is often high in the morning and then gets dragged down when loads
in the neighborhood spike from air conditioning (yes, even in winter here
in Florida). We see drop-outs (with other brand inverters) in the
mid-morning as a result. Usually the utilities here will resolve it if you
demonstrate the voltage is high, even if it's not out of their acceptable
range.

Jason Szumlanski



On Tue, Feb 25, 2020 at 3:16 PM Jerry Shafer <jerrysgarage01 at gmail.com>
wrote:

> Andrew
> What is the AC Voltage when this occurs, to much VAC will shut down the
> inverter. It also looks like you are clipping all the inverters during the
> mid day, is due to low temps or does this always happen. What is the DC
> MPPT voltage, is it at the upper limit.
> Jerry
> NABCEP PV inspector
>
> On Tue, Feb 25, 2020, 12:02 PM Andrew Truitt <atruitt at gmail.com> wrote:
>
>>
>> Wrenches,
>>
>> I have a couple of Solectria 36TLs at a small community solar site in CO
>> that shut themselves down occasionally for what appears to be no reason.
>>
>> [image: image.png]
>>
>> Voltages and frequency are normal, firmware is updated, IR scan shows
>> nothing irregular, and the other 2 inverters at the site (50TLs) are fine.
>> It can happen under sunny or cloudy conditions.  Solectria will RMA the
>> inverters but before I go out and replace I'm curious if anyone has seen
>> this behavior?
>>
>>
>> Regards,
>>
>> Andrew Truitt
>>
>> www.dr.ventures
>> d: 202.486.7507
>>
>> NABCEP Certified PV Installation Professional ID: 032407-66
>> Colorado Journeyman Electrician License No.: 600132
>>
>>
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