[RE-wrenches] Tech Support Issues with Sensata
Ray Walters
ray at solarray.com
Wed May 31 21:21:12 PDT 2023
Those voltage and frequency variations are way out. No need for THD
readings. You can't reliably run a household with that much variation,
it will start letting the magic smoke out of many of the appliances.
I'm not sure about a bad relay, I don't see how that would cause that
variation. That sounds more like a cooked control board. I had
lightning damage cause an inverter to put out 140 vac, while its onboard
electronics read 120 vac.
If it helps, I have a used MS 4024 PAE (very low hours) that I could
send to you. Contact me off list if you want.
Ray Walters
Remote Solar
On 5/31/2023 4:15 PM, Chris Sparadeo via RE-wrenches wrote:
> Ray, I don’t have too much time into troubleshooting, but I have
> confirmed that inverter AC output readings on the RC are suggesting
> steady voltage and frequency but my meter readings are showing
> voltage from 108-135VAC per leg and 60-95 Hz with or without loads. It
> sounds like a bad AC relay, but I haven’t put in the head banging
> against the wall effort to track down tech support that the previous
> installer had.
>
> I agree, a THD would be a good next step.
>
> Kindly,
>
> Chris
>
>
>
> On Wed, May 31, 2023 at 5:06 PM Bradley Bassett via RE-wrenches
> <re-wrenches at lists.re-wrenches.org> wrote:
>
> Just so you know, AEE Solar still has a bunch of Magnum panels and
> controls, no inverters, no support though. At least until they
> find someone to take it all. Keep an eye out for other close out
> stuff too. But, yes they are still going and working on getting
> better.
>
> Brad Bassett
> Retired---
> 1985 Solar Engineering Services->Applied Power->Schott Applied
> Power->AEE Solar->AEE Solar (Mainstream Energy)->AEE Solar
> (Sunrun) 2023
>
> On Wed, May 31, 2023 at 12:29 PM Rich Nicol via RE-wrenches
> <re-wrenches at lists.re-wrenches.org> wrote:
>
> Magnum has been difficult that last 3 years – we currently
> multiple inverters that are down needing boards for repair
> that can’t be obtained. It appears stock of new inverters is
> just starting to trickle back into suppliers so we hope to see
> parts soon.
>
> It seemed Magnum quality took also took a hit when purchased
> by Sensata and I think operations were moved to a new
> location? – we found MMP’s shipped with missing parts etc. The
> best tech support engineer they had went to Outback, but then
> was lost tragically to complications from Covid.
>
> *From:*RE-wrenches
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] *On Behalf
> Of *Ray Walters via RE-wrenches
> *Sent:* Wednesday, May 31, 2023 1:51 PM
> *To:* re-wrenches at lists.re-wrenches.org
> *Cc:* Ray Walters
> *Subject:* Re: [RE-wrenches] Tech Support Issues with Sensata
>
> What were the issues? I've not seen a Magnum have power
> quality troubles, but they are not the "grid" either. My
> experience is that they are similar or a bit better than
> Outback, but certainly have measurable THD in the 4 to 5%
> range. Its almost always finicky loads, and the inverter has
> always been within its tolerances, so I doubt you have an
> actual warranty issue. However, I have seen inverter output
> get strange after lightning damage, which is not covered under
> warranty either.
>
> You need a decent meter that can measure THD, and can capture
> the peak voltage of the waveform. A good oscilloscope is even
> better, so you can see the waveform.
>
> Stuff like clocks not keeping time, or certain digital
> controls on certain appliances not functioning, is not a
> warranty claim. Lights dimming, or LEDs flickering is not a
> warranty claim. These are normal living off grid, and the
> only thing better than a Magnum for power quality is Exeltech
> in my experience.
>
> Ray Walters
> Remote Solar
>
> On 5/31/2023 11:37 AM, Chris Sparadeo via RE-wrenches wrote:
>
> Hi all,
>
> I have a client with a Magnum MS 4024- PAE inverter. There
> are some serious issues with power output quality and
> according to the client, another installer had started the
> RMA process while the inverter was still under warranty,
> however Sensata has not been responsive and has lost track
> of the case. They are asking for a new case to be
> initiated, but the inverter is now out of warranty. Has
> anyone out there had similar lack luster support issues
> with Sensata?
>
> Best,
>
> Chris
>
> --
>
> Chris Sparadeo
>
> C_802-369-4458
>
> H_802-728-3059
>
>
>
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> Chris Sparadeo
>
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