Re: [RE-wrenches] Jacobs Wincharger Book, 1978?

[Allan Sindelar]

Larry,
It was either Wind and Windspinners or The Homebuilt, Wind-Generated
Electricity Handbook, both by Michael Hackleman with substantial
contribution by Windy Dankoff.
Allan Sindelar

On Wed, Aug 24, 2011 at 9:56 PM, Larry Crutcher, Starlight Solar Power
Systems  wrote:

> This one's for you old timer wind wrenches.
>
> Back in 1978 I bought a book on wind generators and rebuilding the Jacobs
> Winchargers. It was a  paperback about 11"X 9". This book was my
> introduction to renewable energy. Does anyone remember the name or author?
> On a long shot, does anyone have a copy they would part with?
>
> Let's see how many of you have been around long enough to remember that
> one!
>
> Thanks.
>
> Larry Crutcher
> Starlight Solar Power Systems
> 11871 S Fortuna Road, #210
> Yuma, AZ 85367
>
> la...@starlightsolar.com
> (928) 342-9103
>
>
>
>
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[RE-wrenches] Jacobs Wincharger Book, 1978?

[Larry Crutcher, Starlight Solar Power Systems]

This one's for you old timer wind wrenches. 

Back in 1978 I bought a book on wind generators and rebuilding the Jacobs 
Winchargers. It was a  paperback about 11"X 9". This book was my introduction 
to renewable energy. Does anyone remember the name or author? On a long shot, 
does anyone have a copy they would part with?

Let's see how many of you have been around long enough to remember that one! 

Thanks.

Larry Crutcher
Starlight Solar Power Systems
11871 S Fortuna Road, #210
Yuma, AZ 85367

la...@starlightsolar.com
(928) 342-9103




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Re: [RE-wrenches] Enphase 215

[Keith Cronin]

William

It seems like the product tries to be everything to all mod manu's, which is 
hard to do, at best.

Don't know if its a limitation in the electronics or design architecture. Could 
also be a strategic position to clamp down on what can be plugged into the 
circuit per NEC to limit their exposure to liability and keeping up with the 
myriad of modules hitting the market every month.

As you point out, its a delicate balance- insolation vs max harvest. Sites that 
are free and clear of any shading are penalized, so to speak.

I suspect they are aware of this design challenge and in the future, we will 
see matched inverters to the mod wattage output to not leave any watts on the 
table.

Within 24 months, we could even see things go a different direction- mods 
labeled AC rating first and DC second. If the inverter is built into the 
modules already, this make the language universal, like virtually all AC wiring 
in a home.
 

Keith



From: William Miller 
To: Keith Cronin ; RE-wrenches 

Sent: Wednesday, August 24, 2011 10:49 AM
Subject: Re: [RE-wrenches] Enphase 215


Keith:

Her's my guess:  Through the MPPT algorithm.  The processor
indicates near maximum output, the MPPT impedance reduces to throttle
back power production.  

This is pure speculation, but I'm stickin' with it (untold told
otherwise).

Throwing away power?  Yes.  If MPPT is not at maximum power
transfer at all times then your investment in PV is not earning it's full
return.  However, your inverter investment is not earning it's full
return during the many hours of less than optimum insolation.  These
are the two factors to balance in system design.

William


At 01:01 PM 8/24/2011, you wrote:

David, et al
>
>Yes, their literature states max output power of 215. Not sure how that
is controlled, except for electronically. 
>
>So this could be the shunt, so to speak and must take into consideration
voltage to follow some algorithm to keep things humming along at that
threshold.
>
>Having said this- are we "throwing away" power then?
>
>Keith___
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[RE-wrenches] SS wire retainer clips

[Drake]

Hello Wrenches,

I'm buying a system from a distributor that says they do not carry 
the stainless steel retainer clips because installers can get these 
cheaper from local electrical suppliers.  I've never seen such a 
thing at an electrical supply.


Does anyone know an electrical supplier that sells these?  What would 
I ask for?  I had believed that these clips were designed 
specifically to clip cables to modules.


Thanks in advance,

Drake


Drake Chamberlin
ATHENS ELECTRIC
OH License 44810
CO license 3773
NABCEP Certified PV
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Re: [RE-wrenches] Enphase 215

[William Miller]

Keith:

Her's my guess:  Through the MPPT algorithm.  The processor indicates near 
maximum output, the MPPT impedance reduces to throttle back power production.


This is pure speculation, but I'm stickin' with it (untold told otherwise).

Throwing away power?  Yes.  If MPPT is not at maximum power transfer at all 
times then your investment in PV is not earning it's full return.  However, 
your inverter investment is not earning it's full return during the many 
hours of less than optimum insolation.  These are the two factors to 
balance in system design.


William


At 01:01 PM 8/24/2011, you wrote:

David, et al

Yes, their literature states max output power of 215. Not sure how that is 
controlled, except for electronically.


So this could be the shunt, so to speak and must take into consideration 
voltage to follow some algorithm to keep things humming along at that 
threshold.


Having said this- are we "throwing away" power then?

Keith
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Re: [RE-wrenches] Enphase 215

[Marv Dargatz]

All,

Please note that I left Enphase about one year ago, and joined John Berdner at 
SolarEdge.

To answer the question, virtually all inverters will deliver more power than 
their rating.  The Max power test for listing on the CEC list of eligible 
inverters requires a full power run at elevated temperature for 3 hours.  At 
the end of that test, the power rating listed on the CEC site is either the 
manufacturer's rating, or the lowest single value recorded during the test, 
whichever is lower.  For this reason, most manufacturers build in a little 
extra margin to account for internal measurement and control system error.

By the way, the UL1741 standard requires that the inverter operates within 10% 
of its' rating.


See ya!

Marv
Director of Technology and Support, North America
SolarEdge Technologies, Inc.
Tech Support Mobile:  +530.798.6770
Mobile: +530.392.0356


-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco 
Mangelsdorf
Sent: Wednesday, August 24, 2011 12:37 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Enphase 215

According to my discussions with Enphase on this subject, the M215 can actually 
put out 225 watts continuous.

Marv?  Please confirm.

marco

The inverter should be current-limited on its output. The other Enphases have a 
higher output power than rated (199 @ 190, 219 @ 210, if memory serves from 
earlier list posts), so this may have a similar window.

215Wac max inverter output / 240V = 0.896
0.896 x 17 = 15.23A
15.23A x 1.25 < 20A so it's OK.
As long as the inverter output is actually 225W or less, you can fit 17 on a 
20A circuit.

As before, you'd have the inverter limiting output when the high-power modules 
are actually performing near or above STC. There will certainly be times during 
the year where the inverters are maxed out but those times will be a small 
portion. Enphase had some documentation on their site about this where they 
claimed it wasn't worth worrying about, but it's a site-specific question that 
the installer should answer.

On 2011/8/24 0:20, Keith Cronin wrote:
> Hey gang
>
> With the 215's on the scene and the tech literature on their website,
> they state you can put up to 17 modules on a string.
>
> Locally, I see folks throwing on 17-235 watt modules. Back of the
> napkin- 235 watts/240 volts = .97 amps.
>
> 17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of
> the circuit, per NEC and in situations of lower voltage, could tip the
> current higher, per module it seems or is the unit current limiting?
>
> Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit
> to
> 20 amp circuit also is a change for the industry at large, as well as
> a few other changes.
>
> As Solarworld is rolling out their 250 watt and others in the same
> zone, it seems there should/could be some caveats on the enphase
> literature to reflect this.
> Thoughts, comments?
>
> Keith
>
>
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Re: [RE-wrenches] Enphase 215

[Keith Cronin]

David, et al

Yes, their literature states max output power of 215. Not sure how that is 
controlled, except for electronically. 

So this could be the shunt, so to speak and must take into consideration 
voltage to follow some algorithm to keep things humming along at that threshold.

Having said this- are we "throwing away" power then?

Keith



From: Dave Click 
To: RE-wrenches 
Sent: Wednesday, August 24, 2011 7:29 AM
Subject: Re: [RE-wrenches] Enphase 215

The inverter should be current-limited on its output. The other Enphases 
have a higher output power than rated (199 @ 190, 219 @ 210, if memory 
serves from earlier list posts), so this may have a similar window.

215Wac max inverter output / 240V = 0.896
0.896 x 17 = 15.23A
15.23A x 1.25 < 20A so it's OK.
As long as the inverter output is actually 225W or less, you can fit 17 
on a 20A circuit.

As before, you'd have the inverter limiting output when the high-power 
modules are actually performing near or above STC. There will certainly 
be times during the year where the inverters are maxed out but those 
times will be a small portion. Enphase had some documentation on their 
site about this where they claimed it wasn't worth worrying about, but 
it's a site-specific question that the installer should answer.

On 2011/8/24 0:20, Keith Cronin wrote:
> Hey gang
>
> With the 215's on the scene and the tech literature on their website,
> they state you can put up to 17 modules on a string.
>
> Locally, I see folks throwing on 17-235 watt modules. Back of the
> napkin- 235 watts/240 volts = .97 amps.
>
> 17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of the
> circuit, per NEC and in situations of lower voltage, could tip the
> current higher, per module it seems or is the unit current limiting?
>
> Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit to
> 20 amp circuit also is a change for the industry at large, as well as a
> few other changes.
>
> As Solarworld is rolling out their 250 watt and others in the same zone,
> it seems there should/could be some caveats on the enphase literature to
> reflect this.
> Thoughts, comments?
>
> Keith
>
>
> ___
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[RE-wrenches] ITS30R?

[All Solar, Inc.]

Wrenches,

It appears that Iota no longer offers the ITS30R transfer switch.

Is there an alternative that you would recommend?

Jeremy

All Solar, Inc
CO, USA

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Re: [RE-wrenches] AUO Unison integrated inverter modules

[Dave Palumbo]

Has anyone gotten their hands on the AUO modules with the built in micro
inverter? Cut sheets on mono and poly modules.

AC Unison PM240PA0  
AC Unison PM250MA0  

 

David Palumbo

Independent Power LLC 

462 Solar Way Drive

Hyde Park, VT 05655

www.independentpowerllc.com 

NABCEP Certified PV Installer

Vermont Solar Partner

23 Years Experience, (802) 888-7194 

 

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Re: [RE-wrenches] Enphase 215

[Marco Mangelsdorf]

According to my discussions with Enphase on this subject, the M215 can
actually put out 225 watts continuous.

Marv?  Please confirm.

marco

The inverter should be current-limited on its output. The other Enphases 
have a higher output power than rated (199 @ 190, 219 @ 210, if memory 
serves from earlier list posts), so this may have a similar window.

215Wac max inverter output / 240V = 0.896
0.896 x 17 = 15.23A
15.23A x 1.25 < 20A so it's OK.
As long as the inverter output is actually 225W or less, you can fit 17 
on a 20A circuit.

As before, you'd have the inverter limiting output when the high-power 
modules are actually performing near or above STC. There will certainly 
be times during the year where the inverters are maxed out but those 
times will be a small portion. Enphase had some documentation on their 
site about this where they claimed it wasn't worth worrying about, but 
it's a site-specific question that the installer should answer.

On 2011/8/24 0:20, Keith Cronin wrote:
> Hey gang
>
> With the 215's on the scene and the tech literature on their website,
> they state you can put up to 17 modules on a string.
>
> Locally, I see folks throwing on 17-235 watt modules. Back of the
> napkin- 235 watts/240 volts = .97 amps.
>
> 17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of the
> circuit, per NEC and in situations of lower voltage, could tip the
> current higher, per module it seems or is the unit current limiting?
>
> Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit to
> 20 amp circuit also is a change for the industry at large, as well as a
> few other changes.
>
> As Solarworld is rolling out their 250 watt and others in the same zone,
> it seems there should/could be some caveats on the enphase literature to
> reflect this.
> Thoughts, comments?
>
> Keith
>
>
> ___
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Re: [RE-wrenches] Enphase 215

[Dave Click]

The inverter should be current-limited on its output. The other Enphases 
have a higher output power than rated (199 @ 190, 219 @ 210, if memory 
serves from earlier list posts), so this may have a similar window.


215Wac max inverter output / 240V = 0.896
0.896 x 17 = 15.23A
15.23A x 1.25 < 20A so it's OK.
As long as the inverter output is actually 225W or less, you can fit 17 
on a 20A circuit.


As before, you'd have the inverter limiting output when the high-power 
modules are actually performing near or above STC. There will certainly 
be times during the year where the inverters are maxed out but those 
times will be a small portion. Enphase had some documentation on their 
site about this where they claimed it wasn't worth worrying about, but 
it's a site-specific question that the installer should answer.


On 2011/8/24 0:20, Keith Cronin wrote:

Hey gang

With the 215's on the scene and the tech literature on their website,
they state you can put up to 17 modules on a string.

Locally, I see folks throwing on 17-235 watt modules. Back of the
napkin- 235 watts/240 volts = .97 amps.

17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of the
circuit, per NEC and in situations of lower voltage, could tip the
current higher, per module it seems or is the unit current limiting?

Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit to
20 amp circuit also is a change for the industry at large, as well as a
few other changes.

As Solarworld is rolling out their 250 watt and others in the same zone,
it seems there should/could be some caveats on the enphase literature to
reflect this.
Thoughts, comments?

Keith


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Re: [RE-wrenches] Enphase 215

[Dave Palumbo]

Do the 215's output more than 215 Watts? 

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Keith Cronin
Sent: Wednesday, August 24, 2011 12:21 AM
To: RE-Wrenches
Subject: [RE-wrenches] Enphase 215

 

Hey gang

 

With the 215's on the scene and the tech literature on their website, they
state you can put up to 17 modules on a string.

 

Locally, I see folks throwing on 17-235 watt modules. Back of the napkin-
235 watts/240 volts = .97 amps.

 

17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of the
circuit, per NEC and in situations of lower voltage, could tip the current
higher, per module it seems or is the unit current limiting?

 

Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit to 20
amp circuit also is a change for the industry at large, as well as a few
other changes.

 

As Solarworld is rolling out their 250 watt and others in the same zone, it
seems there should/could be some caveats on the enphase literature to
reflect this.

 

Thoughts, comments?

Keith

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Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

[John DeBoever]

Larry,

You are right, the battery bank voltage drives the PWM constant voltage of the 
controller. The MPPT is a higher frequency DC/DC converter driving the PV 
module I-V curve to max power point, to which a 300 Hz PWM constant voltage is 
combined.

John

From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher, 
Starlight Solar Power Systems
Sent: Wednesday, August 24, 2011 12:54 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

Hi John,

Current is not reduced "due to" the PWM or the MPPT process ass you described. 
Current is reduced as a function of the electro-chemical process causing the 
internal resistance to increase as the cells reach full absorption. The PWM 
regulation only controls voltage. MPPT is only converting voltage to current 
before PWM controls voltage.

Larry Crutcher
Starlight Solar Power Systems




On Aug 24, 2011, at 9:36 AM, John DeBoever wrote:


Darryl,

Lead acid battery typically recommended bulk charge is 10-15% of C20 for the 
flooded lead acid and 20 -25% of C20 for the sealed valve regulated lead acid.  
Depending the application and the environment, these rates could be optimized, 
on a case by case basis. As the battery voltage raise to the absorption voltage 
(regulation voltage), the current automatically tappers due to the PWM or MPPT 
regulation.
Off-grid standalone PV systems optimum designs feature 5-days autonomy at 80% 
DOD at the worst month-average low temperature. Off-grid PV-genset hybrids 
optimum designs typically feature 2 to 3 days autonomy at 80% DOD same 
conditions.  The purpose of the large battery bank is to take the best 
advantage of the solar energy when it is available to store Ah in the battery 
for a desired power supply system power availability level. So the maximum 
current available from the PV array, after powering the load, is not wasted and 
sent into the battery during bulk charge and then tapered in as the voltage 
raise.

Lithium-ion batteries charge mode have certain benefits in some well-defined 
applications requiring fast charge with the requirement of a BMS.

John



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[RE-wrenches] Enphase 215

[Keith Cronin]

Hey gang

With the 215's on the scene and the tech literature on their website, they 
state you can put up to 17 modules on a string.

Locally, I see folks throwing on 17-235 watt modules. Back of the napkin- 235 
watts/240 volts = .97 amps.

17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of the 
circuit, per NEC and in situations of lower voltage, could tip the current 
higher, per module it seems or is the unit current limiting?

Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit to 20 amp 
circuit also is a change for the industry at large, as well as a few other 
changes.

As Solarworld is rolling out their 250 watt and others in the same zone, it 
seems there should/could be some caveats on the enphase literature to reflect 
this.
 
Thoughts, comments?


Keith___
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Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

[Larry Crutcher, Starlight Solar Power Systems]

Hi John,

Current is not reduced "due to" the PWM or the MPPT process ass you described. 
Current is reduced as a function of the electro-chemical process causing the 
internal resistance to increase as the cells reach full absorption. The PWM 
regulation only controls voltage. MPPT is only converting voltage to current 
before PWM controls voltage.

Larry Crutcher
Starlight Solar Power Systems




On Aug 24, 2011, at 9:36 AM, John DeBoever wrote:

> Darryl,
>  
> Lead acid battery typically recommended bulk charge is 10-15% of C20 for the 
> flooded lead acid and 20 -25% of C20 for the sealed valve regulated lead 
> acid.  Depending the application and the environment, these rates could be 
> optimized, on a case by case basis. As the battery voltage raise to the 
> absorption voltage (regulation voltage), the current automatically tappers 
> due to the PWM or MPPT regulation.
> Off-grid standalone PV systems optimum designs feature 5-days autonomy at 80% 
> DOD at the worst month-average low temperature. Off-grid PV-genset hybrids 
> optimum designs typically feature 2 to 3 days autonomy at 80% DOD same 
> conditions.  The purpose of the large battery bank is to take the best 
> advantage of the solar energy when it is available to store Ah in the battery 
> for a desired power supply system power availability level. So the maximum 
> current available from the PV array, after powering the load, is not wasted 
> and sent into the battery during bulk charge and then tapered in as the 
> voltage raise.
>  
> Lithium-ion batteries charge mode have certain benefits in some well-defined 
> applications requiring fast charge with the requirement of a BMS.
>  
> John

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Re: [RE-wrenches] Pump

[Dave Palumbo]

Hi Jeff,

 

Do you see the increased pressure on the pump submerged an extra 180' deep
as a non issue? I know with cheaper pumps it is an issue to consider. Here
in the soggy northeast static water levels hardly fluctuate at all.

 

Dave

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jeff Oldham
Sent: Wednesday, August 24, 2011 11:30 AM
To: ptalm...@yahoo.com; re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Pump

 

I sure would put the pump near the bottom assuming the pump is rated for the
submersion, perhaps 10-20' off the bottom. The only down side is the extra
drop pipe and cable and that is pretty small price to add to the overall
project and assures the best yield possible over the long system and well
life.


>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative
SOLutions




 
57-Year-Old Mom Looks 25
Mom Reveals $5 Wrinkle Trick That Has Angered Doctors!
 
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Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

[John DeBoever]

Darryl,

Lead acid battery typically recommended bulk charge is 10-15% of C20 for the 
flooded lead acid and 20 -25% of C20 for the sealed valve regulated lead acid.  
Depending the application and the environment, these rates could be optimized, 
on a case by case basis. As the battery voltage raise to the absorption voltage 
(regulation voltage), the current automatically tappers due to the PWM or MPPT 
regulation.
Off-grid standalone PV systems optimum designs feature 5-days autonomy at 80% 
DOD at the worst month-average low temperature. Off-grid PV-genset hybrids 
optimum designs typically feature 2 to 3 days autonomy at 80% DOD same 
conditions.  The purpose of the large battery bank is to take the best 
advantage of the solar energy when it is available to store Ah in the battery 
for a desired power supply system power availability level. So the maximum 
current available from the PV array, after powering the load, is not wasted and 
sent into the battery during bulk charge and then tapered in as the voltage 
raise.

Lithium-ion batteries charge mode have certain benefits in some well-defined 
applications requiring fast charge with the requirement of a BMS.

John

From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Darryl Thayer
Sent: Wednesday, August 24, 2011 10:44 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

One of the advantages of LiFeP is the fast rechange rate.  I have found that 
fast recharge is very hard on LA batteries, if they are recharged faster they 
fail sooner.  Perhaps Jamie or others could answer is there something that can 
be recharged fast?  Capasitors are almost impossible to work with.  Lead 
carbon? Ni Magnisum Cobalt?
From: Jeff Oldham 
To: re-wrenches@lists.re-wrenches.org
Sent: Tuesday, August 23, 2011 5:31 PM
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
I 2nd what Ray Waters is saying. Much too soon, BMS will be an insane 
challenge, we rarely care about weight and footprint like the EV's do. 
Returning defective cells to China IF they accept responsibility for the 
failure - I don't think so!! Sex appeal is overwhelming good judgement, one of 
the curses of our industry.


>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative 
>SOLutions



Penny Stock Jumping 3000%
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This e-mail message and any attachments that accompany it may contain 
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It is intended solely for the use of the individual(s) to whom it was intended 
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Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

[James Surrette]

Hi Darryl, 

When looking at off-grid systems, in your opinion, how often is there excess 
current, i.e. more amps from the PV / Charge Source than can be absorbed & 
approximately what percentage of capacity? 

Looking at Lithium Ion, like NMC, you can recharge at 2x Capacity (so 1/2 hour 
recharge times) however, for off-grid, what do you do with all the excess 
charging capacity once the bank is full? 

LA have decent acceptance until they approach fully charged (20%) and lead 
calcium (AGM, Gel or Flooded Calcium) maintain a higher acceptance rate for 
longer.  There's always a downside (lower cycle life, higher cost, etc) but 
Flooded Calcium may have a place in the off-grid space. 

Regards, 

Jamie

>>> Darryl Thayer  8/24/2011 11:44 AM >>>

One of the advantages of LiFeP is the fast rechange rate.  I have found that 
fast recharge is very hard on LA batteries, if they are recharged faster they 
fail sooner.  Perhaps Jamie or others could answer is there something that can 
be recharged fast?  Capasitors are almost impossible to work with.  Lead 
carbon? Ni Magnisum Cobalt?


From: Jeff Oldham 
To: re-wrenches@lists.re-wrenches.org
Sent: Tuesday, August 23, 2011 5:31 PM
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up


I 2nd what Ray Waters is saying. Much too soon, BMS will be an insane 
challenge, we rarely care about weight and footprint like the EV's do. 
Returning defective cells to China IF they accept responsibility for the 
failure - I don't think so!! Sex appeal is overwhelming good judgement, one of 
the curses of our industry.


>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative 
>SOLutions 




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http://thirdpartyoffers.juno.com/TGL3132/4e542a7bb4c77837e37st04vuc )
Sign up to the #1 voted penny stock newsletter for free today!
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Re: [RE-wrenches] Pump

[Jeff Oldham]

I sure would put the pump near the bottom assuming the pump is rated for the 
submersion, perhaps 10-20' off the bottom. The only down side is the extra drop 
pipe and cable and that is pretty small price to add to the overall project and 
assures the best yield possible over the long system and well life.


>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative 
>SOLutions

57-Year-Old Mom Looks 25
Mom Reveals $5 Wrinkle Trick That Has Angered Doctors!
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Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

[Darryl Thayer]

One of the advantages of LiFeP is the fast rechange rate.  I have found that 
fast recharge is very hard on LA batteries, if they are recharged faster they 
fail sooner.  Perhaps Jamie or others could answer is there something that can 
be recharged fast?  Capasitors are almost impossible to work with.  Lead 
carbon? Ni Magnisum Cobalt?

From: Jeff Oldham 
To: re-wrenches@lists.re-wrenches.org
Sent: Tuesday, August 23, 2011 5:31 PM
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up


I 2nd what Ray Waters is saying. Much too soon, BMS will be an insane 
challenge, we rarely care about weight and footprint like the EV's do. 
Returning defective cells to China IF they accept responsibility for the 
failure - I don't think so!! Sex appeal is overwhelming good judgement, one of 
the curses of our industry.


From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative 
SOLutions


Penny Stock Jumping 3000%
Sign up to the #1 voted penny stock newsletter for free today!
AwesomePennyStocks.com
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Re: [RE-wrenches] new outback inverter

[Darryl Thayer]

yes Todd I am looking forward to using this inverter, I have two applications, 
grid tied that need 
three phase, so I am out of luck.  for now as OUtback has not released a three 
phase version.  
The gen support on standalone for good gens sounds great if gen is low quality 
it can still charge from it.  

From: "toddc...@finestplanet.com" 
To: RE-wrenches 
Sent: Tuesday, August 23, 2011 10:07 PM
Subject: [RE-wrenches] new outback inverter


Wrenches,
 
I posted an absurd price of $13K for the new Outback Radian inverter (GS 8048) 
a couple of days ago. It turns out that was a retail price for an installed 
system that I quickly googled. A more accurate price is around $6K. I am 
looking forward to wrench reviews of this new product. Most of my grid-ties are 
battery based, and this looks like a great alternative to the XW.
 
Todd


Sent from Finest Planet WebMail.

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