[RE-wrenches] Enphase M190 current limiting
Louis Woofenden
louis at woofenden.net
Mon Feb 8 08:25:51 PST 2016
FYI, our affected systems with Enphase M190s are back to normal as of
Saturday morning. I hope that's the case for others as well.
Cheers,
Louis
Rebecca Lundberg wrote:
> Thanks for the reply. I reported it to Enphase but have not heard back
> yet. Since one of these updates happened 5 months ago I was surprised
> the manufacturer hadn't notified installers in the interim before they
> did a more wide spread update, which is why I wrote to this list. I'm
> not in tech support, but seeing what it did to our inverter back 5
> months ago I certainly wouldn't have continued the 'upgrade' and
> pushed that firmware update to the rest of the units! I think most
> people didn't notice so they just went ahead. I know MN temperatures
> are more extreme than other parts of the country so perhaps we've seen
> more failures than others have. But this site with 8 M190s was doing
> just fine before the 'update.'
>
> Rebecca
>
>
>
> From: RE-wrenches
> [mailto:re-wrenches-bounces at lists.re-wrenches.org
> <mailto:re-wrenches-bounces at lists.re-wrenches.org>] On Behalf Of
> Louis Woofenden
> Sent: Wednesday, 03 February, 2016 11:48
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Enphase M190 current limiting
>
>
> Hi Rebecca and all,
>
> We're experiencing the same thing on several M190 sites, though
> not all. Interestingly, M190s that have been replaced are not
> having the same problem.
>
> According to Enphase, it is a software problem. My understanding
> is that they are rolling back software updates on affected devices
> to solve the problem, but I'm not clear on the exact order that
> will happen.
>
> Not sure if being a squeaky wheel on particular systems is going
> to hurt or help. Kind of disappointing that they didn't properly
> beta test any software updates on all types of microinverter
> devices before rolling them out to all customers. Seems like that
> would be common sense.
>
> Best,
> Louis
>
> --
>
> Louis Woofenden
> Engineering Director
> Net Zero Solar, LLC
> 101. W. 5th St., Tucson, AZ 85705
> Arizona ROC #248710, 259756, 259521
>
> Phone: <tel:520.207.4053> 520.207.4053 Ex. 2
>
> Cell: <tel:520.237.5040> 520.237.5040
> Fax: <tel:520.203.7230> 520.203.7230
>
> NABCEP Certified PV Installation Professional?
> NABCEP Certified Solar Heating Installer?
>
>
>
> Luke Christy wrote:
>
>
>
> Hi Rebecca,
>
> After you posted this I looked at the power production history for
> several of our Enphase sites with M190s, and the same thing is
> happening. Inverter output is being clipped at 140W across the board.
>
> This seems like a pretty big deal in terms of potential lost
> production for a lot of users.
>
>
>
> Have you brought this up with Enphase?
>
>
>
> -Luke
>
>
>
>
>
> NABCEP Certified PV Installation Professional?: Certification
> #031409-25
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> CoSEIA Certified PV Installer
>
> Solar Gain Services, LLC
> PO Box 531
> Monte Vista, CO 81144
> sgsrenewables at gmail.com <mailto:sgsrenewables at gmail.com>
> 719.588.3044 <tel:719.588.3044>
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> <http://www.sgsrenewables.com/>
>
>
> On Jan 31, 2016, at 21:08, Rebecca Lundberg
> <rebecca.lundberg at powerfullygreen.com
> <mailto:rebecca.lundberg at powerfullygreen.com>> wrote:
>
> I just noticed that several of our sites with Enphase M190s are
> current limiting at 140 watts. These units used to clip at 199
> watts so I feel like our customers just lost a potential 30% of
> their power output. It appears to be related to a firmware update
> 520-00008-r01-v01.08.00. We've got one site with just 8 units, 1
> of them got this firmware update back in September and has been
> limiting to 140w since then, 5 of them got this update in late
> January and have been limiting to 140w since then, the other two
> are at a previous firmware version and are performing as we would
> expect up to 199w. Have any of you noticed this same thing? Do you
> know what this is about? It doesn't feel very fair on the user end
> of things.
>
> Sincerely,
>
>
> Rebecca Lundberg
> Powerfully Gree
>
> ? n?
>
> Minnesota
>
>
>
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> --
> --
>
> Louis Woofenden
> Engineering Director
> Net Zero Solar, LLC
> 101. W. 5th St., Tucson, AZ 85705
> Arizona ROC #248710, 259756, 259521
>
> Phone: <tel:520.207.4053 <tel:520.207.4053>> 520.207.4053
> <tel:520.207.4053> Ex. 2
>
> Cell: <tel:520.237.5040 <tel:520.237.5040>> 520.237.5040
> <tel:520.237.5040>
> Fax: <tel:520.203.7230 <tel:520.203.7230>> 520.203.7230
> <tel:520.203.7230>
>
> NABCEP Certified PV Installation Professional?
> NABCEP Certified Solar Heating Installer?
>
>
>
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