Re: [RE-wrenches] SMA Arc-Fault

[frank -bz products]

I have found that single point grounding in large complex systems can 
solve a lot strange problems. Just a thought.



BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net

On 11/10/2016 3:20 PM, Drake wrote:
Is your array on a large metal roof, or is it where intense radio 
signals could be getting picked up by your racking? Either of these 
conditions could potentially be your problem.


At 01:37 PM 11/10/2016, you wrote:

Daryl,Â
That is what I thought at first. Very rare, but I suppose not 
impossible that IÂ
would have two inverters with bad arc fault detectors. But since we 
are still
getting arc faults after replacing the inverters, I am thinking that 
it must be

something else.

Cheers,Â
Dave


*--

Dave Tedeyan**
Project Engineer
*
*Taitem Engineering, PC
*109Â S. Albany Street, Ithaca, NY 14850
Voice:Â (607) 277-1118 x121 
www.taitem.com 

On Thu, Nov 10, 2016 at 1:18 PM, > wrote:


There is at least one company (nameless at this point, but not
SMA) that
has been providing replacements for swapping out faulty arc fault
detectors in their inverters. Could it be possible you have a bad
detector?

Daryl



> Hi All,
>
> Maybe someone will have some ideas for why a couple inverters
keep arc
> faulting:
>
> -There are two SB7000TL-22 inverters, Sunpower branded.
> -3 Strings of 7 SPR-327's to each inverter. Kept separate until the
> inverter.
> -Ground mount about 50' from the shed where the inverters are
located
> (indoors)
> -Simple grid connected system, no batteries.
> -There is a whole house generator co-located in the shed.
> -We interconnect by using piercing taps on the line side of the
generator
> transfer switch
> -There has been only one power outage there since the system
was installed
> in April, but the generator fires up weekly.
>
> -The arc faults have been happening on both inverters.
Sometimes only one
> at a time, sometimes both will go within a day of each other.
> -The events have been approximately one a month, but sometimes
more,
> sometimes less.
>
> -We have already checked every single connection in the system
twice, by
> two different people.
> -We have replaced the underground wires (and they looked just fine)
> -We have replaced all home runs.
> -We have replaced both inverters.
> -Arc faults are still happening.
> -Arc faults are not always on the same day/time of the week.
>
> I am wondering if this can be caused by the generator?
> Has anyone run into a situation like this or something similar?
>
> Thanks for your help,
> Dave
>
> *--*
>
>
> *Dave Tedeyan*
> *Project Engineer*
>
> *Taitem Engineering, PC*
> 109 S. Albany Street, Ithaca, NY 14850
> Voice: (607) 277-1118 x121 
> www.taitem.com 
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Re: [RE-wrenches] hi voltage DC relays

[frank -bz products]

Try Mouser or Digi Key.


BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net

On 10/6/2016 12:02 PM, jay wrote:

Hi All,

I”m looking for a DPDT relay.

150vdc
10 amps

Coil voltage is flexible, 12vdc-230v/50hz.

Any suggestions?

thanks

jay

Peltz Power


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Re: [RE-wrenches] micro-inverters

[frank -bz products]

Re 190's.

Not much to learn from dissecting a swollen 190. Most of the time the 
swelling is caused by electrolytic capacitors that have failed. Some 
very high current capacitors actually have brackets to bolt them down to 
minimize swelling.


Frank BZP.

BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net

On 9/14/2016 1:58 PM, Benn Kilburn wrote:
You guys should really cut one of those swelled up ones and share the 
photos with us :)


Benn Kilburn
SkyFire Energy Inc.
780-906-7807

On Sep 14, 2016, at 11:14 AM, Jerry Shafer > wrote:



The 190's had component issues which case them to balloon up
Jerry


On Sep 14, 2016 10:11 AM, "William Miller" > wrote:


Colleagues:

We have M190s fail in beach installations. Some have had the
cases swell up like there is a tumor inside. I haven't cut them
open to see what's inside because they need to go back to
manufacturer.

William

On Sep 14, 2016, at 9:32 AM, Jerry Shafer
mailto:jerrysgarag...@gmail.com>> wrote:


Mike
I also work near the ocean, its all around me here in Hawaii, we
have had the 190's fail but not to environmental conditions and
very few issues with 215's. Do you have any pics of the damage
as l have seen very little salt issues.
Jerry


On Sep 13, 2016 9:11 PM, "Mike Nelson"
mailto:mdelectricso...@gmail.com>>
wrote:

I've had so many Enphase failures it's kind of ridiculous.
We install most of our systems near the ocean so corrosion
has played a big factor. The newer micro inverters are
holding a much better, 215 and 250's. I have learned over
the years that SMA makes the best product, and I mostly
stick with them. Sometimes micro inverters are requested or
really fit the installation particulars, so I still use them
occasionally. I haven't yet tried solar edge.

Michael D Nelson
MD Electric & Solar, Inc.
707-684-0064  mobile
707-884-1862  office
www.mdelectricsolar.com 
Sent from my iPhone

On Sep 13, 2016, at 6:23 PM, Rebecca Lundberg
mailto:rebecca.lundb...@gmail.com>> wrote:


Esteemed wrenches,

I'm hoping the experience of this list can help give us a
broader perspective on the current market performance and
as a secondary concern, tech support (or lack thereof),
from solar micro-inverter manufacturers.

Are others having much trouble with micro-inverters? We
have had repeated issues with several different brands on
our systems in Minnesota:
- 8 Enphase systems with mostly M210 and M215, have had to
repeatedly go back to sites to replace units. The new
replacement ones seem to be lasting better (we sure hope
they will). Enphase is harder to contact in recent years,
but we're happy they at least provide a predictable
stipend. Are you also having to replace a lot of this brand
of product? Are the newer models holding up better?

- We gave a new inverter busbar design concept a try
(tenKsolar) and though the micro-inverters were supposed to
take turns and be 'redundant,' the ones with APS
micro-inverters needed 100% replacement and the ones with
Lead Solar micro-inverters have a problem where if one of
them fails it appears to send a signal to all the rest so
the entire busbar stops working -- in action it's far from
redundant. When we purchased the tenKsolar Rais Inverter
Bus (RIB) the spec sheet didn't tell us what brand of
micro-inverter they would use as the OEM so we couldn't
research the viability of the product or company or
warranty stipend (or lack there-of) of the micro-inverter
OEM. We assumed it was a tenKsolar product and they would
provide warranty replacements, service, and tech support,
but our experience has been far from that. When something
goes wrong tenK says 'it's not our product that's failing'
because they don't actually manufacture the micro-inverter
(it's an OEM), the micro-inverter company says 'it's not
our product' because tenKsolar has it wired and used in a
very unique manner specific to the tenKsolar product, so
both manufacturers are backing away from any
responsibility. A 25-year warranty on the inverter busbar
is a great concept but if/when something goes wrong there
is no support and no apparent warranty at all except maybe
they will send us a new component that needs several hours
of work to re-install, so either the installer does the
warranty work for free or the customer has a very
unexpected expense to get their system back up and runnin

Re: [RE-wrenches] kwh for dishwasher

[frank -bz products]

The heat cycle sterilizes the dishes and should used.

BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net

On 8/31/2016 3:50 PM, Kevin Pegg wrote:

For energy budgeting, I use 0.5 kWh per cycle with no heat dry / hot water temp 
boost. If using heat dry or hot water boost 1 - 1.5 kWh. Peak 1.5 kW for 
heating, 0.3 kW pumps only.

And then of course use of this appliance may trigger water and effluent pumping 
concurrently.

Based on metering several machines over the years, but not the newest.

Kevin

-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf 
Of jay
Sent: August-31-16 8:59 AM
To: RE-wrenches 
Subject: [RE-wrenches] kwh for dishwasher

HI All,

I can’t find usage for a dishwasher.
And as I don’t have one I can’t test it.

Any ideas for a newer high efficiency one?

Both kw and kwh?  Worst case I guess?

thanks

jay


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Re: [RE-wrenches] 24 VDC constant power supply off of 24 volt PV system

[frank -bz products]

Hi Dana,

Check Mouser or Future electronics.

BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net

On 3/26/2015 12:28 PM, Dana wrote:


Hey All,

I am tasked to supply a frontage sign that uses 24 VDC but the voltage 
window is a low 24 & max of 25-26 volts.


Is anyone aware of an efficient DC/DC fixed power supply 24-29 vdc 
battery range and 24-26 vdc output/ Load is 60-70 watts?




*Dana Orzel*

_Great Solar Works, Inc - *NABCEP # 051112-136*_

*E*- d...@solarwork.com  - *Web* - solarwork.com

*O*- 970.626.5253 *C *- 208.721.7003 - No FAX Line

*_"Responsible Technologies for Responsible People since 1988" _**__*

*P*Please consider the environment before printing this email.



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Re: [RE-wrenches] Using a Midnite Classic for Hydro

[frank -bz products]

Industrial 3 phase multi-tap transformers taped at say 75% might be 
another option. Lots of transformers out there.


Frank Lewon.

BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net

On 3/20/2015 9:45 AM, jay peltz wrote:

Hi frank

Yes you can.
However, that might put the volts to low and get line loss issues.
My hydro guru uses multi tap transformers to get the best output voltage.
You'll need three, so,they don't have to be large for a 1kw turbine.

Jay
Peltz power





On Mar 20, 2015, at 5:59 AM, frank -bz products  wrote:

Why not use a 2:1 step down transformer? The open circuit VOC would be 
manageable. Cost is reasonable too.

Frank Lewon BZP.

BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net



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Re: [RE-wrenches] Using a Midnite Classic for Hydro

[frank -bz products]

Why not use a 2:1 step down transformer? The open circuit VOC would be 
manageable. Cost is reasonable too.


Frank Lewon BZP.

BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net



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Re: [RE-wrenches] Fan Controller

[frank -bz products]

Gust a thought. Look into switch mode power supplies. DC to DC buck 
converters. They are very efficient and not to expensive. Try Mouser and 
Future Electronics for industrial grade products.


Frank Lewon
BZ Products INC.
8801 Gravois Rd.
St. Louis MO 63123 USA




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[RE-wrenches] would this work?

[frank -bz products]

2 more cents worth. If your MPP control is powered by both the battery 
and PV source (diode orred) you should be able to pump solar direct. 
Several of our customers do this even though we do not specify the 
feature. You also get great locked rotor start current. The LCB line we 
made for Windy some years ago was based on this. Again not a specified 
feature.


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[RE-wrenches] 24V charging with 60 cell modules

[frank -bz products]

2 cents worth. Boost/buck boost configuration converters use to increase 
the PV voltage are only about 80 to 85 % efficient.


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Frank Lewon
BZ Products INC.
8801 Gravois Rd.
St. Louis MO 63123 USA

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Re: [RE-wrenches] Outback Inverter Radio Interference

[frank -bz products]

Look into Amodon ferrite cores.


On 2/19/2013 1:30 PM, Vince McClellan wrote:

Hello Wrenches
I'm having an issue with a pair of Outback inverters producing 
electromagnetic interference with the low band radios at a site we 
installed recently. Other than a Faraday cage does anyone have any 
methods of reducing the EMI from Outback inverters? I've been looking 
in to ferrite cores but can't seem to find a source that lists what 
the frequency is that is dissipated by the ferrite cores that I can 
find online. I need the ferrite cores to be in the range of 250kHz to 
2MHz.


Thanks,

Vince McClellan
Energy Design


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--
Frank Lewon
BZ Products INC.
8801 Gravois Rd.
St. Louis MO 63123 USA

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