Re: [RE-wrenches] Bi-Facial or transparent modules

[chris]

So, does anyone actually know of any distributor offering bi-facial modules?  I 
know of some manufacturers who claim to have them, but I’m not finding them in 
the U.S.   And I don’t want to buy a container, just enough for a residential 
system…like 16 or so modules in the ~300W range. 
 
Best,
 
Chris Daum
Oasis Montana Inc.
406-777-4309 or 4321
406-777-4309 fax
  www.oasismontana.com 
 
 
 
From: RE-wrenches  On Behalf Of Dave 
Angelini Offgrid Solar
Sent: Thursday, January 3, 2019 9:11 AM
To: RE-wrenches 
Subject: Re: [RE-wrenches] Bi-Facial or transparent modules
 
I have used these below. The last final issue of solar pro had a great article 
on bifacial. On a tracker in the snow or sand they are pretty amazing if done 
right. The old Sanyo bi facials had water problems.
https://www.prismsolar.com/
Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail  offgridso...@sti.net  
text 209 813 0060
On Thu, 3 Jan 2019 10:38:48 -0500, Jason Szumlanski 
mailto:ja...@floridasolardesigngroup.com> > 
wrote:
   
 
I'm curious about this, too. I'm looking for something that accepts MLPE bolted 
to the frame and has a good wind rating.
 
Jason Szumlanski
Florida Solar Design Group
 
 
On Thu, Jan 3, 2019 at 2:19 AM Wayne Irwin mailto:pureenergyso...@hotmail.com> > wrote:
Does anyone have a source for bi-facial or double glass modules with frames?
 
 
Wayne Irwin
President
License #CVC56695
State Licensed Solar Contractor
Pure Energy Solar International Inc.
-- 
 
 
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[RE-wrenches] New hydro design

[chris]

Dear techies:
 
I have a fellow with an interesting project - a new type of micro-hydro
design to assist with irrigation systems.  I'm looking to give his
information to some engineer who can help with the magnets and coil design.
If you have any suggestions who might be able to assist this fellow, please
contact me off list.
 
Sincerely,
 
Chris Daum
Oasis Montana Inc.
406-777-4309 or 4321
406-777-4309 fax
www.oasismontana.com   
 
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Re: [RE-wrenches] Good Tablets for the Solar Installer

[August Goers]

We've experimented around with various devices, and I'll agree that the
Microsoft Surface line is a good choice. You can find 3rd party heavy duty
protective cases on Amazon that are worthwhile if you plan on using it in
the field. Also note that the current Surface Pro 6th gen product only has
one USB type A port so you'll likely need a few dongles to get your work
done. I also have a Surface Go and like it. It is small, light, has a USB C
port, and gets most of my work done BUT it is slow. Microsoft is holding a
product release event on October 2nd that will likely have new surface
products. I would wait for that if you want to either get the latest and
greatest or wait for the older generation to go on sale. Costco had a good
deal for a Surface Pro 6 with pen and keyboard not too long ago.

August
Luminalt




On Tue, Sep 17, 2019 at 1:09 PM Jerry Shafer 
wrote:

> Kelly
> By the time you buy all the extras vs a basic laptop fewer items to carry
> and loose.
> I do programming in Hawaii and California and my Dell still can do e
> everything needed and a lot less money but that's just me "KISS"
>
> On Tue, Sep 17, 2019, 1:02 PM James Rudolph 
> wrote:
>
>> We are transitioning from Dell laptops to Surface Pro's with cell
>> service.
>> The flexibility of these units in the field seems to be unrivaled.
>>
>>
>>
>> *James B. Rudolph*
>>
>> *Hawai'i Unified*
>>
>> *Director of  Energy*
>>
>> *ES Electrician # 10816*
>>
>> *NABCEP Certified PV Installer # 091209-155*
>>
>> *808.594.9969*
>>
>>
>>
>>
>>
>>
>>
>> On Tue, Sep 17, 2019 at 9:14 AM Kelly Larson 
>> wrote:
>>
>>> Esteemed wrenches,
>>>
>>> I am looking to buy a PC tablet/laptop for testing in the field.  I will
>>> be using a Solmetric PVA, Seaward 210 and Survey, excel spreadsheet,
>>> internet, and email.
>>>
>>> I also would like to be able to read and annotate pdfs.
>>>
>>> Suggestions?  What do you use?  What are the advantages and shortcomings
>>> of your device?
>>>
>>> Thank you for your response in advance!
>>>
>>> Kelly
>>>
>>>
>>> ~~~
>>> Kelly Larson
>>> Electrical Engineer
>>> NABCEP Certified PV Installation Professional™
>>> NABCEP Certified PV Installer Specialist™
>>> NABCEP Certified PV Commissioning & Maintenance Specialist™
>>> IREC Certified Master Trainer™/ PV
>>> CA Electrical Contractor# 868189
>>> SolarKelly.com
>>>
>>>
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Re: [RE-wrenches] Strategies for staged startup of appliances

[Chris Schaefer]

Hey Dave,

Sorry for the delay to your question on the ASCO. Yes the 185 is the one I
use either with a service entrance rated CB or without. You can adjust time
so in a power outage the transfer is less than 2 seconds. Have had zero
issues since switching to them over 10 years ago.

Christopher

On Fri, Sep 13, 2019 at 12:17 PM Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> I'll let you all know once we sort this out.
>
> A series of blade type disconnects could work. I'm not doing the AC
> distribution past the inverters, but I need to consult with the electrical
> contractor so I'm driving the bus at this point. Some combination of manual
> and automated controls should work.
>
>
>
>
>
> On Thu, Sep 12, 2019 at 10:10 PM Jay  wrote:
>
>> We don’t know how you have the AC distribution set up.
>>
>> If you have a main that then distributes to sub panels, how about relays
>> on delay timers that go to each sub. 3-5 seconds would be more than enough.
>>
>> Or mechanical discos with simple instructions of delay between each.
>> But yea people have to read and comprehend and it’s probably dark so
>> maybe the delay timers.
>>
>> Let us know what you end up using
>>
>> Jay
>>
>>
>>
>>
>>
>> On Sep 12, 2019, at 3:04 PM, Dave Angelini Offgrid Solar <
>> offgridso...@sti.net> wrote:
>>
>> Jason, any chance of one of the "help" being made knowledgeable to manage
>> this? In a way this is what I do for my offgrid clients. If they won't, I
>> walk away because it is just to complicated at this stage in RE. Hoping it
>> will change!
>>
>> I get them up to speed on managing loads and understanding what is going
>> on with the power. This saves me from the headache. Explain that it can
>> save them quite a bit of money also.  I do not envy you and income is
>> important.  Good Luck!
>>
>> *Dave Angelini Offgrid Solar
>> "we go where powerlines don't"
>> http://members.sti.net/offgridsolar/ 
>> e-mail  offgridso...@sti.net 
>> text 209 813 0060*
>>
>> On Thu, 12 Sep 2019 17:39:13 -0400, Jason Szumlanski <
>> ja...@floridasolardesigngroup.com> wrote:
>>
>> I definitely understand that I can't prevent it 100%, but I can surely
>> mitigate the likelihood. It's highly unlikely that all 10 refrigerators
>> will all start simultaneously based on temperature with the well pump and
>> two air conditioners except when power is first applied. Moreso than the
>> ATS changeover, I'm concerned about scenarios where everything is
>> completely off at the property and the inverter breakers are flipped on.
>> Then I'm essentially guaranteed I'll have 15 motors all trying to start at
>> the same time. I'm planning 27-32kW of capacity, which may well be enough
>> depending on how gentle the HVAC units start, but I want to have a strategy
>> in case things don't go as planned.
>>
>> I was thinking that the ATS would be a good strategy to trigger time
>> delays because it would be implemented whether it was a startup from no
>> power source or during power source transfer.
>>
>> The challenge here is that more than half of these loads will be used
>> maybe a few weeks a year. I'm tasked with designing a system that will
>> operate efficiently with both high and low occupancy levels, and it's only
>> responsible of me to investigate ways to reduce the budget requirement for
>> the total system. Money is probably not a factor here, but bigger, bigger,
>> bigger also means bigger headaches when you have 8 inverters to maintain
>> rather than 6 or 4.
>>
>> I do have some other thoughts like ensuring the well pump doesn't turn on
>> while the Air Conditioning is running. Since it's on a float switch with
>> ample at-grade storage, I don't really care if it runs only at periods of
>> light load.
>>
>> You do have a point about turning refrigerators on and off by switching
>> power. I might look into ways to cut the compressor using controls in the
>> refrigerators instead. That will be a conversation with Sub-Z to see if
>> they care that power is cycled during operation.
>>
>>
>>
>>
>>
>> On Wed, Sep 11, 2019 at 8:16 PM Jay  wrote:
>>
>>>
>>> You've got to plan on them all starting at once anyway. You can't expect
>>> that it'll never happen.
>>>
>>> And really how do you prevent it. The refrigerators and AC's are on all
>>> the time waiting for the thermostat to activate.  And it's not good to turn
>>> a working fridge on/off especially is the compressor is running.
>>>
>>> Bigger loads, bigger inverters, bigger dollars.
>>>
>>> Jay
>>>
>>>
>>>
>>> On Sep 11, 2019, at 4:24 PM, Jason Szumlanski <
>>> ja...@floridasolardesigngroup.com> wrote:
>>>
>>> That is what I was thinking, but how will the contactor coils "know"
>>> when the ATS switches to inverter power. I'm thinking I need to use an AUX
>>> relay or a series of relays to produce the desired result. I don't think it
>>> will be necessary when going from solar to generator in this case, but
>>> maybe. I guess the question is how to act

Re: [RE-wrenches] Good Tablets for the Solar Installer

[Jerry Shafer]

Kelly
By the time you buy all the extras vs a basic laptop fewer items to carry
and loose.
I do programming in Hawaii and California and my Dell still can do e
everything needed and a lot less money but that's just me "KISS"

On Tue, Sep 17, 2019, 1:02 PM James Rudolph 
wrote:

> We are transitioning from Dell laptops to Surface Pro's with cell service.
> The flexibility of these units in the field seems to be unrivaled.
>
>
>
> *James B. Rudolph*
>
> *Hawai'i Unified*
>
> *Director of  Energy*
>
> *ES Electrician # 10816*
>
> *NABCEP Certified PV Installer # 091209-155*
>
> *808.594.9969*
>
>
>
>
>
>
>
> On Tue, Sep 17, 2019 at 9:14 AM Kelly Larson  wrote:
>
>> Esteemed wrenches,
>>
>> I am looking to buy a PC tablet/laptop for testing in the field.  I will
>> be using a Solmetric PVA, Seaward 210 and Survey, excel spreadsheet,
>> internet, and email.
>>
>> I also would like to be able to read and annotate pdfs.
>>
>> Suggestions?  What do you use?  What are the advantages and shortcomings
>> of your device?
>>
>> Thank you for your response in advance!
>>
>> Kelly
>>
>>
>> ~~~
>> Kelly Larson
>> Electrical Engineer
>> NABCEP Certified PV Installation Professional™
>> NABCEP Certified PV Installer Specialist™
>> NABCEP Certified PV Commissioning & Maintenance Specialist™
>> IREC Certified Master Trainer™/ PV
>> CA Electrical Contractor# 868189
>> SolarKelly.com
>>
>>
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Re: [RE-wrenches] Good Tablets for the Solar Installer

[William Miller]

Kelly:



I really like the tablet I use.  My criteria are:



1.   Windows based with full computer capabilities.

2.   Portable.

3.   Reliable.

4.   Decent storage size.





I chose the Microsoft Surface Go.  Out of the box it checks all of the
boxes except 4.  I overcame the latter by installing a 128G micro SD card.
There is a trick to mapping Dropbox to an external card but that was
resolved and I have been very happy with the tablet.



I did purchase an aftermarket charger to provide charging in the field.
That unit is a Battpower Multifunction Travel Charger.  You will also need
some type of USB C hub for reading SD cards and USB drives.  Top that off
with an HDMI adapter for presentations and trainings and you have a
complete kit.



William





Miller Solar

17395 Oak Road, Atascadero, CA 93422

805-438-5600

www.millersolar.com

CA Lic. 773985



*From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
Behalf Of *Kelly Larson
*Sent:* Tuesday, September 17, 2019 12:14 PM
*To:* RE-wrenches@lists.re-wrenches.org
*Subject:* [RE-wrenches] Good Tablets for the Solar Installer



Esteemed wrenches,

I am looking to buy a PC tablet/laptop for testing in the field.  I will be
using a Solmetric PVA, Seaward 210 and Survey, excel spreadsheet, internet,
and email.

I also would like to be able to read and annotate pdfs.

Suggestions?  What do you use?  What are the advantages and shortcomings of
your device?

Thank you for your response in advance!

Kelly



~~~

Kelly Larson
Electrical Engineer

NABCEP Certified PV Installation Professional™

NABCEP Certified PV Installer Specialist™

NABCEP Certified PV Commissioning & Maintenance Specialist™

IREC Certified Master Trainer™/ PV

CA Electrical Contractor# 868189
SolarKelly.com
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Re: [RE-wrenches] Good Tablets for the Solar Installer

[James Rudolph]

We are transitioning from Dell laptops to Surface Pro's with cell service.
The flexibility of these units in the field seems to be unrivaled.



*James B. Rudolph*

*Hawai'i Unified*

*Director of  Energy*

*ES Electrician # 10816*

*NABCEP Certified PV Installer # 091209-155*

*808.594.9969*







On Tue, Sep 17, 2019 at 9:14 AM Kelly Larson  wrote:

> Esteemed wrenches,
>
> I am looking to buy a PC tablet/laptop for testing in the field.  I will
> be using a Solmetric PVA, Seaward 210 and Survey, excel spreadsheet,
> internet, and email.
>
> I also would like to be able to read and annotate pdfs.
>
> Suggestions?  What do you use?  What are the advantages and shortcomings
> of your device?
>
> Thank you for your response in advance!
>
> Kelly
>
>
> ~~~
> Kelly Larson
> Electrical Engineer
> NABCEP Certified PV Installation Professional™
> NABCEP Certified PV Installer Specialist™
> NABCEP Certified PV Commissioning & Maintenance Specialist™
> IREC Certified Master Trainer™/ PV
> CA Electrical Contractor# 868189
> SolarKelly.com
>
>
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Re: [RE-wrenches] Good Tablets for the Solar Installer

[Jerry Shafer]

Dell laptop,

On Tue, Sep 17, 2019, 12:14 PM Kelly Larson  wrote:

> Esteemed wrenches,
>
> I am looking to buy a PC tablet/laptop for testing in the field.  I will
> be using a Solmetric PVA, Seaward 210 and Survey, excel spreadsheet,
> internet, and email.
>
> I also would like to be able to read and annotate pdfs.
>
> Suggestions?  What do you use?  What are the advantages and shortcomings
> of your device?
>
> Thank you for your response in advance!
>
> Kelly
>
>
> ~~~
> Kelly Larson
> Electrical Engineer
> NABCEP Certified PV Installation Professional™
> NABCEP Certified PV Installer Specialist™
> NABCEP Certified PV Commissioning & Maintenance Specialist™
> IREC Certified Master Trainer™/ PV
> CA Electrical Contractor# 868189
> SolarKelly.com
>
>
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[RE-wrenches] Good Tablets for the Solar Installer

[Kelly Larson]

Esteemed wrenches,

I am looking to buy a PC tablet/laptop for testing in the field. I will 
be using a Solmetric PVA, Seaward 210 and Survey, excel spreadsheet, 
internet, and email.


I also would like to be able to read and annotate pdfs.

Suggestions?  What do you use?  What are the advantages and shortcomings 
of your device?


Thank you for your response in advance!

Kelly


~~~
Kelly Larson
Electrical Engineer
NABCEP Certified PV Installation Professional™
NABCEP Certified PV Installer Specialist™
NABCEP Certified PV Commissioning & Maintenance Specialist™
IREC Certified Master Trainer™/ PV
CA Electrical Contractor# 868189
SolarKelly.com


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