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@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@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-boun...@lists.re-wrenches.org] *On Behalf
Of *Ray Walters via RE-wrenches
*Sent:* Wednesday, May 31, 2023 1:51 PM
*To:* re-wrenches@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
C_802-369-4458
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