[RE-wrenches] Radian - Mate 3 incorrect high voltage reading

[Jerry Shafer]

Wrenches,
Regarding inaccurate voltage, now that you have cycled the connections at
the ribbons, you may want to very closely inspect the boards as cracked
solder joints can be temporarily corrected by just touching the ribbons,
your phone camera can get real close and zoom in to look at each solder
joint and verify a good connection,
Fun times to all

On Wed, Apr 9, 2025, 10:04 AM Drake Chamberlin via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> For a followup, it appears that the problem was in a ribbon cable
> connection. After checking the power wiring and starting the inverter
> again, the problem still remained.
>
> Then, I disconnected and reconnected the ribbon cables at both ends. On
> restart, the voltage was with 6 V of the multi meter reading. I adjusted
> this out with the offset in the calibration menu. The voltage has read
> steady for a day now.
>
> Thank you!
>
> Drake
>
> Drake Chamberlin
>
>
>
>
>
> *Athens Electric LLCOH Electrical Contractor License 44810NABCEP Certified
> Solar PV Installation Professional740-856-9648*
> ---
>
>
>
> On 2025-04-06 09:25, Mac Lewis via RE-wrenches wrote:
>
> Also look for loose connections and corrosion.  If it tries to push
> current and the voltage rapidly rises, it can indicate resistance
> somewhere.
>
> Good luck!
>
> On Sun, Apr 6, 2025 at 7:20 AM Maverick Brown via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> Maybe the Calibrate setting got changed somehow.
>
> OpticsRE: Device Map, Inverter, Calibrate.
>
> From the Mate: Lock, 141, Settings, Inverter, Calibrate.
>
> Make sure the settings are Zero offset or at least appropriate.
>
> Thank you,
>
> Maverick
>
> Maverick Brown
> Off-Grid Solar Commander since 2006
> Maverick Solar Enterprises, Inc.
>  • Solar Commander Remote Power
>  • SunFlow Systems Cathodic Protection
> maverick at mavericksolar.com
> 512-460-9825
>
>
>
> On Apr 5, 2025, at 1:22 PM, Drake Chamberlin via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> A Radian 4048 disconnected from the grid with a high grid voltage error
> showing on the Mate 3. The Mate 3 was displaying a voltage of 279 - 280 V.
> The Mate 3 was replaced with another Mate 3, and the high voltage reading
> remained.
> When the voltage was checked with two separate multi meters, the readings
> came out to 249 - 250 V. I believe that the 249 - 250 volt reading is
> correct.
>
> The incorrect, high voltage reading seems to be coming for the inverter,
> not the Mate 3, since two Mates were used.
>
> Has anyone experienced this?
>
> What could be the cause and solution to the problem?
>
> Thank you,
>
> Drake
>
>
> Drake Chamberlin
>
>
>
>
>
> *Athens Electric LLCOH Electrical Contractor License 44810NABCEP Certified
> Solar PV Installation Professional740-856-9648*
>
>
> --
>
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> --
>
>
>
> Mac Lewis
>
> "Yo solo sé que no sé nada." -Sócrates
>
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