Re: [RE-wrenches] SMA String inverters

[August Goers via RE-wrenches]

Hi Dave - Yes, the Powerwall 3 has LFP cells. I believe they are planning
on shipping it for the mass market later this year. It looks cool from what
I've seen - DC coupled (one inverter for both PV and battery) with 6 PV
trackers, 11.5 kW AC output, among other features.

August


On Wed, Jan 10, 2024 at 4:28 PM Dave Angelini Offgrid Solar via RE-wrenches
 wrote:

> Hi August,
>
> I was told Tesla has LFP battery now.  True?  Thanks !
>
>
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
>https://offgridsolar1.com/ 
>   
> e-mail  offgridso...@sti.net 
> text 209 813 0060*
>
>
> On 2024-01-10 3:25 pm, August Goers via RE-wrenches wrote:
>
> We're starting to install the Tesla Solar Inverter with good results:
>
> https://www.tesla.com/support/energy/solar-inverter/tesla-solar-inverter
>
> It is going to be a tough product for others to compete with - the price
> point is low and features are high. 4 x MPPTs with low tracking voltage (60
> VDC), built in consumption monitoring, one SKU to handle 7.6 kW, 5.7 kW, 5
> kW, 3.8 kW AC rating via software programming, built in
> ethernet/WiFi/cellular and the rapid shutdown can meet the NEC hazard
> control system requirements meaning that only one Mid-Circuit
> Interrupter (MCI) is needed for every three modules. All in all, a solid
> offering with lots of design flexibility. Time will tell how reliable they
> are.
>
> Best, August
>
>
>
> On Wed, Jan 10, 2024 at 10:04 AM William Miller via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
> Jeremy:
>
>
>
> We generally avoided using the 41 series inverter for reasons specified
> here
> .
> If you find a new string inverter in the SMA lineup, you might want to
> check to see if they have resolved some of the shortcomings.
>
>
>
> I have not had reason to use string inverters because, other than Solar
> Edge, they do not offer intrinsic rapid shutdown.  Careful reading of the
> NEC indicates that even ground mount arrays require RSS unless the PV
> feeders run to a building with the sole use being to house solar
> equipment.  Having said that, I would imagine that if an inverter were
> mounted on the ground-mount rack, the requirement for RSS could be avoided.
>
>
>
> William Miller
>
>
>
> Miller Solar
>
> 17395 Oak Road, Atascadero, CA 93422
>
> 805-438-5600
>
> www.millersolar.com
>
> CA Lic. 773985
>
>
>
>
>
> -Original Message-
> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
> Behalf Of Jeremy Rodriguez via RE-wrenches
> Sent: Monday, January 8, 2024 1:44 PM
> To: re-wrenches@lists.re-wrenches.org
> Cc: Jeremy Rodriguez
> Subject: [RE-wrenches] SMA String inverters
>
>
>
> What are you wrenches that used to install the SB-41 units sourcing
> now? Looks like there is a new model on their website
>
>
>
>
>
> Jeremy Rodriguez
>
> Solar Installation / Design
>
> All Solar, Inc.
>
> 1453 M St.
>
> Penrose Colorado 81240
>
>
>
> Sent by Jeremy's iPhone. Sorry for typos and shorthand.
>
> ___
>
> List sponsored by Redwood Alliance
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Re: [RE-wrenches] SMA String inverters

[Dave Angelini Offgrid Solar via RE-wrenches]

Hi August,

I was told Tesla has LFP battery now.  True?  Thanks !

Dave Angelini Offgrid Solar
"we go where powerlines don't"
   [3]https://offgridsolar1.com/ [4]  [3]
e-mail  offgridso...@sti.net
text 209 813 0060

On 2024-01-10 3:25 pm, August Goers via RE-wrenches wrote:


We're starting to install the Tesla Solar Inverter with good results:

https://www.tesla.com/support/energy/solar-inverter/tesla-solar-inverter

It is going to be a tough product for others to compete with - the 
price point is low and features are high. 4 x MPPTs with low tracking 
voltage (60 VDC), built in consumption monitoring, one SKU to handle 
7.6 kW, 5.7 kW, 5 kW, 3.8 kW AC rating via software programming, built 
in ethernet/WiFi/cellular and the rapid shutdown can meet the NEC 
hazard control system requirements meaning that only one Mid-Circuit 
Interrupter (MCI) is needed for every three modules. All in all, a 
solid offering with lots of design flexibility. Time will tell how 
reliable they are.


Best, August

On Wed, Jan 10, 2024 at 10:04 AM William Miller via RE-wrenches 
 wrote:



Jeremy:

We generally avoided using the 41 series inverter for reasons 
specified here [1].  If you find a new string inverter in the SMA 
lineup, you might want to check to see if they have resolved some of 
the shortcomings.


I have not had reason to use string inverters because, other than 
Solar Edge, they do not offer intrinsic rapid shutdown.  Careful 
reading of the NEC indicates that even ground mount arrays require RSS 
unless the PV feeders run to a building with the sole use being to 
house solar equipment.  Having said that, I would imagine that if an 
inverter were mounted on the ground-mount rack, the requirement for 
RSS could be avoided.


William Miller

Miller Solar

17395 Oak Road, Atascadero, CA 93422

805-438-5600

www.millersolar.com [2]

CA Lic. 773985

-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] 
On Behalf Of Jeremy Rodriguez via RE-wrenches

Sent: Monday, January 8, 2024 1:44 PM
To: re-wrenches@lists.re-wrenches.org
Cc: Jeremy Rodriguez
Subject: [RE-wrenches] SMA String inverters

What are you wrenches that used to install the SB-41 units 
sourcing now? Looks like there is a new model on their website


Jeremy Rodriguez

Solar Installation / Design

All Solar, Inc.

1453 M St.

Penrose Colorado 81240

Sent by Jeremy's iPhone. Sorry for typos and shorthand.

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Links:
--
[1] 
https://millersolar.com/MillerSolar/case_studies/SMA_40_Series/Whats_wrong_with_40_Series.html

[2] http://www.millersolar.com
[3] http://members.sti.net/offgridsolar/
[4] https://offgridsolar1.com/___
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Re: [RE-wrenches] SMA String inverters

[August Goers via RE-wrenches]

We're starting to install the Tesla Solar Inverter with good results:

https://www.tesla.com/support/energy/solar-inverter/tesla-solar-inverter

It is going to be a tough product for others to compete with - the price
point is low and features are high. 4 x MPPTs with low tracking voltage (60
VDC), built in consumption monitoring, one SKU to handle 7.6 kW, 5.7 kW, 5
kW, 3.8 kW AC rating via software programming, built in
ethernet/WiFi/cellular and the rapid shutdown can meet the NEC hazard
control system requirements meaning that only one Mid-Circuit
Interrupter (MCI) is needed for every three modules. All in all, a solid
offering with lots of design flexibility. Time will tell how reliable they
are.

Best, August




On Wed, Jan 10, 2024 at 10:04 AM William Miller via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Jeremy:
>
>
>
> We generally avoided using the 41 series inverter for reasons specified
> here
> .
> If you find a new string inverter in the SMA lineup, you might want to
> check to see if they have resolved some of the shortcomings.
>
>
>
> I have not had reason to use string inverters because, other than Solar
> Edge, they do not offer intrinsic rapid shutdown.  Careful reading of the
> NEC indicates that even ground mount arrays require RSS unless the PV
> feeders run to a building with the sole use being to house solar
> equipment.  Having said that, I would imagine that if an inverter were
> mounted on the ground-mount rack, the requirement for RSS could be avoided.
>
>
>
> William Miller
>
>
>
> Miller Solar
>
> 17395 Oak Road, Atascadero, CA 93422
>
> 805-438-5600
>
> www.millersolar.com
>
> CA Lic. 773985
>
>
>
>
>
> -Original Message-
> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
> Behalf Of Jeremy Rodriguez via RE-wrenches
> Sent: Monday, January 8, 2024 1:44 PM
> To: re-wrenches@lists.re-wrenches.org
> Cc: Jeremy Rodriguez
> Subject: [RE-wrenches] SMA String inverters
>
>
>
> What are you wrenches that used to install the SB-41 units sourcing
> now? Looks like there is a new model on their website
>
>
>
>
>
> Jeremy Rodriguez
>
> Solar Installation / Design
>
> All Solar, Inc.
>
> 1453 M St.
>
> Penrose Colorado 81240
>
>
>
> Sent by Jeremy's iPhone. Sorry for typos and shorthand.
>
> ___
>
> List sponsored by Redwood Alliance
>
>
>
> Pay optional member dues here: http://re-wrenches.org
>
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>
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> other:
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Re: [RE-wrenches] SMA String inverters

[William Miller via RE-wrenches]

Jeremy:



We generally avoided using the 41 series inverter for reasons specified here
.
If you find a new string inverter in the SMA lineup, you might want to
check to see if they have resolved some of the shortcomings.



I have not had reason to use string inverters because, other than Solar
Edge, they do not offer intrinsic rapid shutdown.  Careful reading of the
NEC indicates that even ground mount arrays require RSS unless the PV
feeders run to a building with the sole use being to house solar
equipment.  Having said that, I would imagine that if an inverter were
mounted on the ground-mount rack, the requirement for RSS could be avoided.



William Miller



Miller Solar

17395 Oak Road, Atascadero, CA 93422

805-438-5600

www.millersolar.com

CA Lic. 773985





-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of Jeremy Rodriguez via RE-wrenches
Sent: Monday, January 8, 2024 1:44 PM
To: re-wrenches@lists.re-wrenches.org
Cc: Jeremy Rodriguez
Subject: [RE-wrenches] SMA String inverters



What are you wrenches that used to install the SB-41 units sourcing
now? Looks like there is a new model on their website





Jeremy Rodriguez

Solar Installation / Design

All Solar, Inc.

1453 M St.

Penrose Colorado 81240



Sent by Jeremy's iPhone. Sorry for typos and shorthand.

___

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Re: [RE-wrenches] SMA String inverters

[Dave Tedeyan via RE-wrenches]

We also stopped using the -41's in 2023 due to the -SB requirement in NY.
We moved to Enphase for grid tied systems. I am hearing from Greentech that
the new Sunny Boy units, up to 7.7kw, should be available very soon. These
will have a secure power supply capability. But the larger KW units and the
better backup options will not be available until likely this summer. Its
been tough for string inverters here recently, but I am hoping these new
Sunny Boy's are good.

Cheers,
Dave

On Mon, Jan 8, 2024 at 7:20 PM AE Solar via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> We haven’t used the -41s for just over a year, because they aren’t
> UL1741SB compliant (which became required here in NY last January).
> Additionally, the last time we did use the -41s we discovered (upon
> receiving the units) that they weren’t WiFi compatible anymore (due to some
> parts shortages) and that the inverters had to be hardwired in order to
> access monitoring.  The new inverter line that shows up on the SMA website
> is UL1741SB compliant, but the last time I checked with my distributor (a
> few weeks ago) they still weren’t able to get access to them.
>
> On Mon, Jan 8, 2024 at 4:44 PM Jeremy Rodriguez via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> What are you wrenches that used to install the SB-41 units sourcing
>> now? Looks like there is a new model on their website
>>
>>
>> Jeremy Rodriguez
>> Solar Installation / Design
>> All Solar, Inc.
>> 1453 M St.
>> Penrose Colorado 81240
>>
>> Sent by Jeremy's iPhone. Sorry for typos and shorthand.
>> ___
>> List sponsored by Redwood Alliance
>>
>> Pay optional member dues here: http://re-wrenches.org
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> There are two list archives for searching. When one doesn't work, try the
>> other:
>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>
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>> http://www.re-wrenches.org/etiquette.htm
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>> http://www.members.re-wrenches.org
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>> ___
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-- 
[image: Logo] 
Dave Tedeyan, P.E.
Owner | Sungineer Solar
p: he | him | his
a: 1653 Slaterville Rd. | Ithaca, NY 14850
w: www.sungineersolar.com 
c: (607) 270-0370
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Re: [RE-wrenches] SMA String inverters

[AE Solar via RE-wrenches]

We haven’t used the -41s for just over a year, because they aren’t UL1741SB
compliant (which became required here in NY last January). Additionally,
the last time we did use the -41s we discovered (upon receiving the units)
that they weren’t WiFi compatible anymore (due to some parts shortages) and
that the inverters had to be hardwired in order to access monitoring.  The
new inverter line that shows up on the SMA website is UL1741SB compliant,
but the last time I checked with my distributor (a few weeks ago) they
still weren’t able to get access to them.

On Mon, Jan 8, 2024 at 4:44 PM Jeremy Rodriguez via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> What are you wrenches that used to install the SB-41 units sourcing
> now? Looks like there is a new model on their website
>
>
> Jeremy Rodriguez
> Solar Installation / Design
> All Solar, Inc.
> 1453 M St.
> Penrose Colorado 81240
>
> Sent by Jeremy's iPhone. Sorry for typos and shorthand.
> ___
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
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