Hi i have a single phase motor at a old install that i replaced about
8 years ago. Would it help if i made some starting load surge measurments?
On Fri, Jan 28, 2022, 11:52 PM Darryl Thayer wrote:
> Hi Chris, In the past, I was able to start a 5 hp pump motor using a VFD.
> , I can not remember
An Outback X-240 auto transformer on a VFX3648 buzzes loudly with a load
of 400 W. The sound diminishes and finally stops with higher loads.
The load was an electric, oil filled space heater.
Has anyone seen this before?
Thank you,
Drake
Drake Chamberlin
Athens Electric LLC
Ohio Electrical
Not positive, but I’d suspect resonant frequencies.. might be simple as using
flat washers under the mounting screws.. maybe try adding an inductive load to
skew the power factor.. gobs of information online.. good luck. db
Sent from my iPhone
> On Jan 31, 2022, at 10:34 AM, drake.chamber...@re
Thanks for offering Darryl, but I have pretty good data on the 120/240VAC
single phase motor I am up against. NEC 430 suggests LRC is 188 A, but I am
measuring more like 112A during start up. I am thinking that using the VFD
for slower ramp up AND as a phase converter from single phase to three
pha
Hi Chris,
I’m not enough of an EE to know that answer.
But my guess is it isn’t going to be enough to make much of a difference, still
a massive hit on the inverters
Given the cost of the transformers with install vs the correct motor with VFD
drive.
I’d go with new motor/VFD and you know f
Friends:
It is quite rare for us to install off-grid systems on roof-tops. We have
one coming up with about 20kW on a large barn roof. This will be our first
off-grid with a module-level rapid shutdown requirement. I see no
exemptions from RSS for off-grid systems in the code. I have looked
Hi William,
I have had good luck with the Tigo TS4-AF. Although it does require a 12VDC
power supply for it's RSD transmitter, Outback, Sol Ark and Schnieder have
a straight forward integration not requiring dependency of AC output from
inverter.
Best,
Chris
On Mon, Jan 31, 2022 at 12:57 PM Wil
One thing you might want to check is for any DC getting into the
transformer. This can cause the transformer to saturate on one side
of the sinewave, leading to high peak currents and a buzz. You can
try checking for this by putting a DMM set to DC across the AC line.
Should be well under a volt.
Hi William,
We have a half dozen plus off grid systems using SolArk inverters and
TIGO optimizers. They work well and the TIGO's, from my experience,
have been really reliable. The necessary 12 volt signal can come
directly from the relay in the SolArk inverter.
Best,
Daryl DeJoy
NABCEP Certifi
Friends:
I am installing my first Blue Planet system today. I ordered an 8kWh unit
so that means only 4 of the 8 battery positions are filled. I can’t find
anything on the Blue Planet site or in the literature on how to implement
only 4 battery modules. I have called every Blue Planet number
That seems very odd that that pos cable(to the breaker/ bmu) does not
reach. I've done partial 2.0's before and that lead could reach any pos
battery terminal, regardless of the shelf it's on. Am I missing something?
Maybe 48v HI leads are different. I heat shrinked the unconnected busbar
length as
We have a design challenge where we think the use of microinverters with a
SolarEdge Energy Hub and inverter might provide advantages.
I can not find any literature nor FAQs on AC-coupling Enphase to the backed
up side of the SolarEdge Backup Interface Unit. Has anyone done it or can
point me
So do you have the new cabinet or the older 2.0,
Jerry
On Mon, Jan 31, 2022, 1:18 PM William Miller
wrote:
> Friends:
>
>
>
> I am installing my first Blue Planet system today. I ordered an 8kWh unit
> so that means only 4 of the 8 battery positions are filled. I can’t find
> anything on the B
William
In the case where l am only installing 4 or 6 batteries, l start at the top
half and leave the bottom empty, l also cut the positive and negative bars
and it look great after. I did ask years ago for dead fronts but it never
came to be.
Don't forget to address each one and get all the sn# a
William,
We have had good luck, the guy you want to talk to is Jody Powell. He has
been a tech there for a couple of years or more.
Vic Guillot
Sol Sierra, Inc.
Vic Guillot
Sol Sierra, Inc.
209.795.3554 office
209.768.3560 mobile/text
On Mon, Jan 31, 2022 at 1:18 PM William Miller
wrote:
> Fr
William,
We did one this year, offgrid, Outback Radian with Simpliphi batteries.
Used the outback rapid shutdown option which is probably similar to the
fire raptor system.
Cheers!,
Vic Guillot
Vic Guillot
Sol Sierra, Inc.
209.795.3554 office
209.768.3560 mobile/text
On Mon, Jan 31, 2022 at 9:5
Hi William.
Of the 30+ Blue Planet jobs we have done - The 2.0 and HI versions the
positive cable has always only just reached the top corner. When we
populate only half of the cabinet we don't cut the buss bar as this will
cause more work trying to get a longer replacement buss bar from Blue
Pla
Hi William.
We have had good luck with the AP Smart Rapid shutdown system. It is
similar to the Tigo in that it sends a "heartbeat" signal to the units up
behind each solar panel over the power wires. I haven't tried the Tigos yet
but would be open to it if the opportunity presented itself. The t
I also recently used the Tigo with Sol-Ark to provide the 12V signal with
good success. The Tigo transmitter can also (barely) fit inside the Sol-Ark
wiring compartment, so you do not need the whole Tigo enclosure for it.
Cheers,
Dave
On Mon, Jan 31, 2022 at 8:21 PM Kirpal wrote:
> Hi William.
>
Yes, this is a loose connection coupled with no way to detect and respond
to the Arc fault. It doesn't have to be loose on that conductor on a
common bus, any bad connection can build up heat and melt conductors.
Scary!
On Mon, Jan 31, 2022, 6:51 PM Dave Tedeyan wrote:
> Hi All,
>
> I was tr
William
Are you sure RSD is required on a non habitable building, historically its
not required. Now that being said we use fire raptor with the best results,
yes it takes an extra conduite and might require a button and power supply
depending on inverter application.
Jerry
On Mon, Jan 31, 2022, 9
Jerry:
Yes it is required. Rapid Shutdown: NEC 690.12. All buildings except
dedicated solar buildings. Read it and weep.
William
Miller Solar
17395 Oak Road, Atascadero, CA 93422
805-438-5600
www.millersolar.com
CA Lic. 773985
*From:* Jerry Shafer [mailto:jerrysgarag...@gmail.
Kirpal:
Thanks for that suggestion. The AP Smart system modules are certainly more
compact and this is a plus for me.
Do you have to have a sensor transformer and logic unit on each string?
Could more than one string be routed through one sensor coil? This
installation will have 10 strings
Friends:
Thanks for all of the input about the Blue Planet 8kWh configuration. Here
is the story: The red lead is supposed to be longer. It is supposed to
have enough slack looped behind the panel so you can pull enough out to
connect to the second from bottom shelf. There was a redesign and
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