Have you considered using a thermostat? Like the A19 series. Mechanical,
non-electric.
Kevin
From: RE-wrenches On Behalf Of
Drake Chamberlin via RE-wrenches
Sent: December-13-23 8:08 AM
To: RE-wrenches
Cc: drake.chamber...@redwoodalliance.org
Subject: [RE-wrenches] 48 V DC temp sensing relay
William,
I'm planning to use a 48 V battery vent fan, turned around backwards, to
blow air into the box.
Thank you,
Drake
_Drake Chamberlin_
_Athens Electric LLC_
_Ohio Electrical Contractor's License 44810_
_NABCEP Certified PV Installation Professional_
---
On 2023-12-13 11:25,
It depends on how bad the fault is. Insulation resistance testing can
definitely find some intermittent ground faults.
Thanks,
Will
From: RE-wrenches On Behalf Of Dave
Tedeyan via RE-wrenches
Sent: Wednesday, December 13, 2023 2:46 PM
To: RE-wrenches
Cc: Dave Tedeyan
Subject: [EXTERNAL] Re:
Just an FYI, it is specifically an "insulation resistance" error that the
inverter is throwing, and not an "arc fault" error. Fortunately it is not
an arc fault. Meggering is not a bad idea, although due to the fact that
the fault is intermittent, that might not show anything?
Cheers,
Dave
On
You might want to make sure that the SMA inverter has the latest firmware.
It's been a long time since we've routinely installed these, but at one
point arc faults were being falsely tripped and firmware updates from SMA
helped with the issue.
I think that using a megger etc to test the panels and wires is what I’d do before I yanked out all the Wires. They are not that expensive anymore and maybe possible to rent one?JayOn Dec 13, 2023, at 8:53 AM, Dave Tedeyan via RE-wrenches wrote:Hi All,I am curious to hear if anyone else has run
Hi Drake
Try this one. I get a lot of equipment from supply house.
Since you need on with temp rise it’s an AC type.
This one will do 8 amps at 120v so a small amp dc fan won’t hurt the relay.
Jay
Drake:
I tried running 48 VDC muffin fans on battery voltage. They failed. I
switched to a Dc-Dc converter (12 or 24, can’t remember) from digi-key and
problem solved.
Point being battery voltage ranges may be too extreme for some components.
William Miller
Miller Solar.com
805-438-5600
Hello,
Does anyone know of a 48 VDC temperature sensing relay? I need to use
one to control a fan in a 48 V battery bank, to bring in cold air when
the bank gets too hot from the wood heating system in the house.
The relay needs to operate with the 48 VDC power supply and disconnect a
small
Could be moisture accumulation in the conduit over the years along with a minor
insulation damage.I am tracing a similar intermittent on an Aurora roof mount.
Incompatible MC connectors are my first pass at repair, however has also not
corrected the issue.Only fails after rain.IRT testing did
It could be the inverter. The TL-22 series had a lot of problems with
false arc fault errors.
_Drake Chamberlin_
_Athens Electric LLC_
_Ohio Electrical Contractor's License 44810_
_NABCEP Certified PV Installation Professional_
---
On 2023-12-13 10:52, Dave Tedeyan via RE-wrenches
Hi All,
I am curious to hear if anyone else has run into this:
This is the system I posted about a little while ago that had the
SolarWorld modules and all the module to module connectors were swollen and
melted. One of the inverters was giving an insulation resistance error, and
so after seeing
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