>
> Redway, CA 95560
>
> www.greenwired.com
>
> [image: Description: signature]
>
>
>
>
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ] *On Behalf Of *
> palumbo1...@gmail.com
> *Sent:* Thursday, September 05, 2019 7:48 PM
> *
Of *palumbo1...@gmail.com
*Sent:* Thursday, September 05, 2019 7:48 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Large off-grid inverter/storage
Is “25 Kw per hour” a real value? For us old school people there is kW
and they is kWh (kilowatt hours). I’m guessing that it is 25 kWh per
average
Hi Andrew,
Any phrase that includes “per hour” while describing power use, generation or
storage in a RE system is probably a misnomer. Think about it: you could just
as well say 25kW per second or per month. That’s because kW is a term that
describes a rate or power, not a quantity of energy
-wrenches
Subject: Re: [RE-wrenches] Large off-grid inverter/storage
Is “25 Kw per hour” a real value? For us old school people there is kW and they
is kWh (kilowatt hours). I’m guessing that it is 25 kWh per average day, or,
about 750 KWh / month.
Dave Palumbo
Hyde Park, VT
Sent from my iPhone
NT:
Thursday, September 05, 2019 3:15 PM
TO: RE-wrenches
SUBJECT:
[RE-wrenches] Large off-grid inverter/storage
Hey Everyone,
I have
been recently been getting more and more inquiries for some quite large
off-grid sytems(25kw per hour) and seeing what you guys have for
suggestions on bigge
4
>>
>> NABCEP # 051112-136 www.solarwork.com
>> <http://www.solarwork.com/>
>> "Responsible Technologies for Responsible People since 1988"
>>
>> P Please consider the environment before printing this email.
>>
>>
Is “25 Kw per hour” a real value? For us old school people there is kW and they
is kWh (kilowatt hours). I’m guessing that it is 25 kWh per average day, or,
about 750 KWh / month.
Dave Palumbo
Hyde Park, VT
Sent from my iPhone
> On Sep 5, 2019, at 5:15 PM, Andrew wrote:
>
> Hey Everyone,
>
onsider the
environment before printing this email.
FROM: RE-wrenches ON BEHALF OF
Andrew
SENT: Thursday, September 05, 2019 3:15 PM
TO: RE-wrenches
SUBJECT:
[RE-wrenches] Large off-grid inverter/storage
Hey Everyone,
I have
been recently been getting more and more inquiries for some quite la
esponsible Technologies for Responsible People since 1988"
P Please consider the environment before printing this email.
From: RE-wrenches On Behalf Of
Andrew
Sent: Thursday, September 05, 2019 3:15 PM
To: RE-wrenches
Subject: [RE-wrenches] Large off-grid inverter/storage
Hey Every
Hey Everyone,
I have been recently been getting more and more inquiries
for some quite large off-grid sytems(25kw per hour) and seeing what you guys
have for suggestions on bigger inverters and storage systems? I could do 2
triple stack Schneider's and a bunch of HUPS industrial
nchronized
>> generators that can ramp up/down based on demand. Perhaps similar tech
>> to what Tesla is doing in Australia.
>>
>> Kevin
>>
>>
>> -Original Message-
>> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org]
There are many large 250kw to multi mw battery based inverters that should
cover this project.
Most are coming out of china, so I don’t know if UL is something they have.
Princeton is one here in the USA, looks like 250kw and 500kwh is their largest
on the web site.
Sun Grow is one of many
12:37 PM
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Subject: [RE-wrenches] Large Off Grid Inverter?
Greetings Fellow Wrenches;
We are consulting on a power system for a large off grid facility that is
currently operating on a 1500 kW gen set. The loads are enormous for normal
of
nerators that can ramp up/down based on demand. Perhaps similar tech to
> what Tesla is doing in Australia.
>
> Kevin
>
>
> -Original Message-
> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
> Behalf Of Ray
> Sent: April-25-18 12:37 PM
>
Try a three phase soft starter. Programmable start ramp time with relay
bypass. Not as expensive as a full blown VFD.
Frank BZP.
On 4/26/2018 9:17 AM, Dave Angelini Offgrid Solar wrote:
Agree with Daryl here at the end. You have to solve the motor surge with
variable frequency drive and go
: April-25-18 12:37 PM
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Subject: [RE-wrenches] Large Off Grid Inverter?
Greetings Fellow Wrenches;
We are consulting on a power system for a large off grid facility that is
currently operating on a 1500 kW gen set. The loads are enormous for
A tough assignment, but Daryl has the right idea.
A company I used to work for did large off grid systems and would use something
they called a rotary capacitor (or something like that). It was a large
induction motor paralleled into the grid. It had a DC pony motor and some
synchro
We're not too worried about reducing the surge at this point; the
existing soft start controller is currently programmed for a fast start,
because their electrician was worried about motor damage if the
controller was set to limit current. It is currently surging to 700% of
run current, so we
Agree with Daryl here at the end. You have to solve the motor surge with
variable frequency drive and go 3 phase. If there is a reasonable cost to
use the grid I would not even bother with quoting an off the grid
solution. It is what the grid is best at and batteries are the wrong way
for this.
you have a problem that is much bigger than I work on. But on a large
motor heavy starting loads problem, we used an extra capacitor on the DC
bus of the frequency drive. the drive on its own greatly reduced the start
surge, if the load can be started slowly. If the motor must ramp up
quickly
Greetings Fellow Wrenches;
We are consulting on a power system for a large off grid facility that
is currently operating on a 1500 kW gen set. The loads are enormous for
normal off grid: in the neighborhood of 600 amps continuous at 480 v 3
phase. Surges are close to 2000 amps, but we are
21 matches
Mail list logo
