Re: [RE-wrenches] Transformerless inverter conversion

Here is a link to download the SolarPro May/June 2016 issue reference below: https://drive.google.com/file/d/1eiBt5n-ABfNn2ng8IwVl2yMvVHpQlZ_U/view?usp=sharing -August On Tue, Apr 23, 2024 at 4:34 PM August Goers wrote: > Hi William and All - > > The SolarPro Magazine article o

Re: [RE-wrenches] Converting from transformer to transformerless

Hi William, I'll rattle off a few notes based on some of my experiences: If I were to replace an old Sunny Boy transformer inverter with a modern transformerless inverter, what are the implications? *[August Goers] I'll forward you and the group an old SolarPro Magazine article called "Up

Re: [RE-wrenches] Non-battery string inverter options?

The last I checked, Fronius's inverters were not compatible with current CA smart grid requirements, so won't be approved to connect to the grid, so be careful there. Maybe they have new models now? Tesla's 7.6 kW PV inverter is good, affordable, and can be installed without MLPE. It also has 4

Re: [RE-wrenches] Recommendation on DC Breaker

I've used Midnite DC combiners in the past with good results. Since you are over 150 VDC, I believe you'd need to select the 1000 VDC fuse holder(s) for your application: https://www.midnitesolar.com/productPhoto.php?product_ID=78_ID=9=4=p August On Thu, Jan 18, 2024 at 7:43 AM Jason

Re: [RE-wrenches] SMA String inverters

ar/>https://offgridsolar1.com/ > <https://offgridsolar1.com/> <http://members.sti.net/offgridsolar/> > 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 S

Re: [RE-wrenches] SMA String inverters

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

Re: [RE-wrenches] SMA TL-22 insulation resistance error

You might want to make sure that the SMA inverter has the latest firmware. It's been a long time since we've routinely installed these, but at one point arc faults were being falsely tripped and firmware updates from SMA helped with the issue.

Re: [RE-wrenches] Enphase Gateway causing lamp to flicker

I don't have experience with Enphase's battery system nor have I seen this issue with the touch lights. However, I wonder if there might be something up with neutrals or grounds on the site? Disconnected neutrals, neutrals bonded to ground in more than one location, lack of a good ground grounding

Re: [RE-wrenches] Metal Truss Roofs

Hi James, I haven't had an application exactly as you describe with a tile roof / plywood deck over metal trusses. However, we have installed systems with metal roof support structures many times. Metal self-drilling screws have impressive pullouts, so you might be able to use them with any sort

Re: [RE-wrenches] Cleaning PV mods

I now live in a more rural part of California and the dust buildup and bird droppings on my modules cuts energy production down by about 5% during the dry months. I imagine that professional cleaning services would still cost more than the recouped energy production, especially since the dirt

Re: [RE-wrenches] sealing a carport array

Hi Kirk, This probably isn't the answer you want, but we insist that a conventional roof is installed (could be metal, bitumen, etc) and then install the array on top if the client needs it to be watertight. It just seems like everything else such as rubber gaskets or tape will be temporary or

Re: [RE-wrenches] Service rated tap devices

Hi Mac - Here's a list of NEC 230.46 compliant multitap connectors from NSI, maker of Polaris brand: https://www.nsiindustries.com/line-side-skus/ Note that only the two-port variants are currently on their list, which is sort of a pain. We've been using the IT-350 which has dual-side wire

Re: [RE-wrenches] AFCI tripping on SB 4000US-12

Hi William - Is this a TL-21 inverter line from maybe 8 or 10 years ago? If I recall correctly, that was around the time period that SMA was first shipping with AFCI detection - we

Re: [RE-wrenches] 2018 Residential Code Fire Setbacks

It looks like Virginia is indeed on the amended 2018 version of the IRC. I've found that UpCodes is pretty cool (normally I just use the California codes since that's where we work): https://up.codes/codes/virginia I think that article that Rick pointed to was talking about the 3' pathways

[RE-wrenches] active vs apparent power readings with solar

Hi Wrenches, We have a residential site with grid tied solar where there is an electrician involved who has gotten into taking site readings and thinks there is a power factor problem. My gut on it is that there is some sort of measurement reading error, and that the power factor should be around

Re: [RE-wrenches] Attaching Array To or Through Ply

We've found that in the Bay Area that deck-mount solutions typically pencil out structurally (via a structural professional engineer) as long as the deck is 1/2" plywood or thicker, assuming we have all the info on how the roof is constructed. The big assumption is that we can get all that roof

Re: [RE-wrenches] PID and iLumen

Hi Marco - You might want to check with SunPower again, my understanding is that they are planning on releasing a PID solution (it might be the iLumen PIDbox). I don't know about timing or other details at this point. Best, August Luminalt On Fri, Mar 10, 2023 at 5:23 PM Marco Mangelsdorf via

Re: [RE-wrenches] California NEM3 specific question

The NEM2 / NBT transition is only mandated for the three investor-owned utilities in California. Other privately or municipally owned utilities play by their own rules - I believe there are several such as Palo Alto, SMUD, Alameda Municipal Power, LADWP, etc that aren't necessarily changing their

Re: [RE-wrenches] California NEM3 specific question

I'm not aware of any other option than completely removing and decommissioning the old PV system and installing a new system to lock in NEM2 for a new 20 year term. We are experiencing unprecedented demand for PV right now as people sign up to lock in under NEM2. There are a lot of nuances to

Re: [RE-wrenches] Remote battery disconnects

> http://www.re-wrenches.org/etiquette.htm >> > >> > Check out or update participant bios: >> > http://www.members.re-wrenches.org >> > >> ___ >> List sponsored by Redwood Alliance >> >>

[RE-wrenches] NEC 230.46 spliced and tapped conductors

Hi Wrenches - Occasionally we will do supply side connection for our PV systems. As of 1/1/2023 in CA, we follow the 2020 NEC 705.11 Supply-Side Source Connections section. Recently, an inspector asked us to comply with the following: 230.46 Spliced and Tapped Conductors Service-entrance

Re: [RE-wrenches] Sunpower Performance Warranty Claim

dress & 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/pi

Re: [RE-wrenches] SMA without WiFi

Many WiFi range extenders on the market also include an ethernet port. This will allow you to hardwire your Sunnyboy to the extender via ethernet. First, you setup the extender to join the existing WiFi network. Then you just plug in your ethernet cable and should be good to go. Here is an

Re: [RE-wrenches] Onboard PV Charging Kit for Electric Vehicle

I've been happy with Victron charge controller / inverter equipment, they seem to be very popular in the RV space. Here is a potential 3000 VA inverter model that might work, other sizes and configurations are available as well:

Re: [RE-wrenches] Enphase

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 > > List rules & etiquette: > http://www.re-wr

Re: [RE-wrenches] 26% to 30% ITC for 2022?

ere the government folks actually work through the exact interpretations of this bill, so there will be more info coming I’m sure. On Mon, Aug 15, 2022 at 1:32 PM August Goers wrote: > This SEIA link has a PDF fact sheet you can download with info: > > > https://www.seia.org/res

Re: [RE-wrenches] 26% to 30% ITC for 2022?

olar? > > Jason Szumlanski > Florida Solar Design Group > > On Mon, Aug 15, 2022, 4:32 PM August Goers via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> This SEIA link has a PDF fact sheet you can download with info: >> >> >> https://ww

Re: [RE-wrenches] 26% to 30% ITC for 2022?

This SEIA link has a PDF fact sheet you can download with info: https://www.seia.org/research-resources/inflation-reduction-act-solar-energy-and-energy-storage-provisions-summary August Luminalt On Fri, Aug 12, 2022 at 4:51 AM Dana Orzel via RE-wrenches < re-wrenches@lists.re-wrenches.org>

[RE-wrenches] Fronius in the game?

Is Fronius pulling out of the US market? Best, August *August Goers* Luminalt Energy Corporation www.luminalt.com ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.o

Re: [RE-wrenches] Equipment for 400 Amp Service Supply Side & 2 200s

or the PV > backfeed? I need 2 x 200 amp mains plus a 200 amp pv backfees point and > the meter needs to have test bypass links. > > Sent from my iPhone > > On Mar 29, 2022, at 10:34 AM, August Goers wrote: > >  > Hi Jeff - > > There are several 400 A (or 3

Re: [RE-wrenches] Wires between arrays

This IAEI Magazine article may address this issue a bit: https://iaeimagazine.org/features/electrical-systems-are-you-protected/ Your inspector might be concerned with the rough edges portion of the article: [image: image.png] You may be able to argue with the inspector that you have simply

Re: [RE-wrenches] Cable Ties

I'm partial to Heyco Sunbundlers which are PVC coated stainless cable ties: https://www.heyco.com/Solar_Power_Components/product.cfm?product=Sunbundler-Cable-Ties We try to do the majority of our wire management with stainless S-clips mounted on module frames or rail mounted C-shaped clips.

Re: [RE-wrenches] Solar Panel Sealant

e here has used that as well? > > Cheers, > Dave > > On Wed, Mar 9, 2022 at 9:32 AM August Goers wrote: > >> We’ve been using ChemLink M-1 for at least 10 years now, I have not seen >> any signs of issues: >> >> https://chemlink.com/wp-content/uploads/2021/01/M

Re: [RE-wrenches] Solar Panel Sealant

wo 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 > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm &

Re: [RE-wrenches] Transmitting 15kW 3600ft Off Grid.

3600 feet is 0.68 miles. That's a long distance. I totally agree with Ray's suggestion that a second system is probably a better option. August On Mon, Jan 10, 2022 at 11:49 AM Tump wrote: > Hey this is exactly everything I was going to say. Ahh the new owner, the > dentist he’s a real piece

Re: [RE-wrenches] Rapid Shutdown Control for a System for a Multimode System Adding an Array to a Subpanel in Garage

Hi Chris - If I'm following you right, you have a PV system on a detached garage that ties into a backup subpanel also in the garage? The code only requires the RSID (rapid shutdown initiation device) to be on the exterior of the building. Would it work to put the RSID on the garage exterior? You

Re: [RE-wrenches] Older Flush Mount Sub-panel

ent 'till Thursday 11/18 to advise me of their intent. > > It would be a shame to lose a client of long standing. > > We shall see what we shall see. > > - Peter > > On 11/11/2021 3:24 PM August Goers wrote: > > > Hi Peter - The cost for new equipment is a drop in th

Re: [RE-wrenches] Older Flush Mount Sub-panel

Hi Peter - The cost for new equipment is a drop in the bucket compared to labor and just getting it right so it passes inspection. There's not much you can do if the front cover is missing and it looks like an indoor panel located in an outdoor location. Maybe you don't need an inspection? Even

Re: [RE-wrenches] Pitch Pockets

Adam - This is a good topic. We are finding more and more flat roofs with rigid insulation installed over the wood decking to provide cricketing (for drainage) and insulation for the home. Installing standard stanchions is difficult because it is hard to find the rafters and also we need to use a

Re: [RE-wrenches] SolarEdge inverter blowing fuses

I would definitely check the insulation on the AC-side wiring as Lloyd mentioned. Sometimes small faults don't show up until there is moisture in the air (or conduit) or until max current conditions. As long as you have time delay fuses property sized, it would be rare for them to blow more than

Re: [RE-wrenches] Sun power 327 modules

rue but no one is making inverters that work with sunpower > anymore and that is a big problem > Jerry > > On Fri, Sep 17, 2021, 9:17 AM August Goers wrote: > >> SunPower still sells 327s to authorized dealers. >> >> August >> >> >> >>

Re: [RE-wrenches] Sun power 327 modules

SunPower still sells 327s to authorized dealers. August On Fri, Sep 17, 2021 at 7:54 AM Jay wrote: > Hi all > > I have a customer wanting to add 3 x 327 sunpower modules to his existing > array of 327 sunpower modules. > > 2 questions. > > Does anyone know where I could find 3, yeah

Re: [RE-wrenches] Transformerless inverter conversion

Hi William - I think this article by Bill Brooks directly answers both of your questions: https://www.southportland.org/files/8814/8156/0204/NEC_2017_Updates_for_PV_Systems___SolarPro_Magazine.pdf -August On Thu, Sep 16, 2021 at 9:19 AM William Miller wrote: > Friends: > > > > Thanks to all

Re: [RE-wrenches] "Re-powering" Aging Utilty Scale PV systems

ad, Atascadero, CA 93422 > > 805-438-5600 > > www.millersolar.com > > CA Lic. 773985 > > > > > > *From:* August Goers [mailto:aug...@luminalt.com] > *Sent:* Thursday, September 9, 2021 9:34 AM > *To:* William Miller > *Cc:* RE-wrenches; Greg Notley; jonath

Re: [RE-wrenches] "Re-powering" Aging Utilty Scale PV systems

gt; exposed to high voltages as well. Equipment failure is always a > possibility. > > > > Thanks again to those many participants who have replied to my question. > I am much smarter because of my wrench forum friends. > > > > William Miller > > > > Miller S

Re: [RE-wrenches] "Re-powering" Aging Utilty Scale PV systems

Hi William - You raise a great question - can you install 600 VDC modules on a 1000 VDC SolarEdge system? Of course the DC optimizer output circuit would need to be rewired with 1000 VDC wiring and connectors, but I think the answer is "yes." According to this article

Re: [RE-wrenches] Over-torquing Module Clamps?

enches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > -- August Goers Luminalt o: 415.792.666

Re: [RE-wrenches] Tile roofs

Hi All - William makes some really good points - the underlayment can be a big problem on tile roofs. We have a (nearly) squeaky clean track record with roof leaks, but have had one nightmare of a problem on an old tile roof where the felt underlayment was failing and leaking essentially all over

Re: [RE-wrenches] Air Conditioning energy usage

William - As others have pointed out, there are all sorts of factors that would increase or decrease energy consumption for an AC unit. I like to refer to the Energy Star guide to get an idea of average annual energy consumption:

Re: [RE-wrenches] Vehicle to Grid

ycling. Like l said yes it can be done but we have very good stationary > battery tech so why. But hey that just my opinion > Jerry > NABCEP PV inspector > > On Thu, Jun 17, 2021, 8:34 AM August Goers wrote: > >> Jerry - there are some key difference between V2G with PV and

Re: [RE-wrenches] Vehicle to Grid

ept the refer cold, its smokey > and you have no recharge-ability. > Jerry > > > On Thu, Jun 17, 2021, 7:24 AM August Goers wrote: > >> Hi Carl - >> >> V2G (Vehicle to Grid) is one of the most exciting areas of technology >> coming down the pipes. It's easy

Re: [RE-wrenches] Vehicle to Grid

Hi Carl - V2G (Vehicle to Grid) is one of the most exciting areas of technology coming down the pipes. It's easy to imagine a day where you can tap into ~100 kWh or more of storage sitting in your EV and benefit from bi-directional charging with PV. I'm trying to get my head wrapped around the

Re: [RE-wrenches] Grid overvoltage and undervoltage issues on SMA install

Hi James - Is there a long run between the inverters and the point of interconnection? As others have pointed out, it appears that the symptoms you describe are voltage drop related. If the wire size is too small it will result in voltage at the inverters going up when current starts to flow. The

Re: [RE-wrenches] Ferrules crimps

Hi William, Years ago we were buying ferrules and ferrule crimpers to deal with the extra fine stranded conductors coming with microinverter trunk cabling at the time. I think it was PowerOne / ABB. Anyway, if that's the type of ferrules you need, we got them from ferrulesdirect.com. Ferrule

Re: [RE-wrenches] MC4s are listed for THWN, right?

Hi Jason - I noticed that Tesla is using the Wago connectors in their Powerwalls. They only go up to #10, but they certainly appear to have some advantages such as easy QC inspection, compactness, and price. We are in the process of trying a batch of these out, but I hadn't considered using them

Re: [RE-wrenches] MC4s are listed for THWN, right?

Hi Blake - Greetings from across the Bay! We've been using the Buchanan/Ideal splice caps for approximately the last 5 years - they are awesome. As you mention, there is a lot of grey area in exactly what is appropriate in an outdoor box and rated for the various combos of wires we use in solar.

Re: [RE-wrenches] Protecting New Roofing during Summer

Corey and Others Who Have Used Cougar Paws: Have you found that these special shoes will protect the roof when it is hot out? It seems like they are touting the good grip on their website, but not necessarily that they protect the roof. Best, August On Tue, Mar 9, 2021 at 12:03 PM Corey

Re: [RE-wrenches] Protecting New Roofing during Summer

Hi James - That's interesting to hear about newer model shingles staying softer. We work solely in the San Francisco Bay Area where heat isn't typically a big problem, yet we still run into soft composition shingle issues on warmer days, especially on new roofs. We use scraps of old carpet cut

Re: [RE-wrenches] Enphase IQ Envoy Distance for Monitoring

Hi Jason - I don't have the answer to your question because we've mounted the monitoring box out by the array for similar applications to what you described. I would suggest that if you mount your envoy far from the array, that at least you run a spare 1" PVC with some pull points out to the array

Re: [RE-wrenches] Tesla Powerwall

Hi Darryl - Yea, you have a good point. We have recently used the SMA freq/watt curtailment feature on a bigger off grid system with SMA Tripower inverters and a Tesla Powerpack. We programmed a curve into the SMA inverters so that the Powerpack can throttle SMA PV production on a smooth curve,

Re: [RE-wrenches] Raceway Partitions or Barrier in Gutters

Hi Mac, We use wireway "gutters" all the time. Our supplier mostly sends us Hoffman brand wireways and they also sell a barrier kit: Here is an example of a barrier and a 4"x4"x24" wireway, you'd need to spec out the dimensions you need for your project:

Re: [RE-wrenches] Tesla Powerwall

Hi Jon, We've installed Powerwalls in combination with a good handful of different PV inverters including SMA Sunnyboys, SolarEdge, Fronius, Enphase, SunPower SolarBridge MIs, and ABB/PowerOne. They have all worked fine. Of course the true test is how well they AC-couple during a grid outage. We

Re: [RE-wrenches] Remote Alert and Bootstrapping on Sunny Island AC Coupled System

We had one Sunny Island system go totally dead years ago. The only way to get it running again was to charge the batteries, which we did in groups of two (6 volt batteries each) with a heavy duty 12 VDC automotive charger. It took about a week to charge all the batteries. Jerry, it's good to know

Re: [RE-wrenches] Supply side denial

Others have pointed this out, but I thought I'd just add a bit of info based on my experience - the issue is not so much whether you can do a supply side connection or not, as that is allowed in the code. The issue is whether you can do wiring in a section of equipment that is only for the

Re: [RE-wrenches] Cedar Shake roofs

Hi Howie, We bump into wood shake roofs from time to time in the Bay Area. I second what others have said. In particular, make sure the roof is not too old. We have a cutoff of 10 years old or less in order to consider self-waterproofing the install. Otherwise, we insist on roofer engagement. The

Re: [RE-wrenches] Metal roof/self taping screws

This topic surfaces from time to time on Wrenches. We've had good luck with S-5! CorruBrackets, which use self tappers into the sheet metal. I see that S-5! has a few newer similar products as well: https://s-5.com/products/clamps-brackets/ As mentioned on previous posts, the pullout for self

Re: [RE-wrenches] Positive grounded arrays

Hi Louis, As Marco mentioned, this is a pain point for long term SunPower "friends." First, we are still able to source isolated (transformer based) inverters through SunPower. I think the last few we got were SMA Sunny Boys. That seems like your best bet. I believe Enphase has a device that can

Re: [RE-wrenches] Source PV/H2O

Hi Chad - I have no experience installing this product, but bumped into it a few years ago when someone reached out to us to see if we could install it. So, I have no idea how well it works. However, for our market which is grid tied PV and the SF Bay Area, it seemed a lot more cost effective

Re: [RE-wrenches] Commercial three phase inverter @208V

We have a similar size system in the works and a designer recommended Dongan transformers: https://dongan.com/product/ I have not sourced them or worked with them yet, but they definitely have models that will work spec-wise with the CORE1 inverters. August On Fri, Sep 18, 2020 at 3:10 PM

Re: [RE-wrenches] Pika Support by chance?

ncorporate that feature in an > inverter?? Sounds like bean counting. > > My $.02 worth > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049www.frenergy.net > > On 9/11/

Re: [RE-wrenches] Pika Support by chance?

In CA the market for ESS is primarily grid tied support features driven by SGIP + backup (public safety power shutoffs, folks who live in less stable grid areas, folks worried about natural disasters) so the ESS is designed to replace generators. This might be a little trickier for areas that need

Re: [RE-wrenches] Re-mounting a legacy Grid-tied system, after re-roofing

Hi Howie, There is definitely some grey area involved in your situation - and, you are not alone in facing this type of situation. As systems age, we're finding removal and replacements becoming very common. Many companies don't want to do this type of work because it almost always opens up a can

Re: [RE-wrenches] 200A Automatic Transfer switch

Kirpal - It's been a few years, but we've used Briggs & Stratton automatic transfer switches on multiple projects with good results. Most of our projects were with Sunny Islands. At least at the time, the transfer swtiches didn't require any external control system to switch from grid to off

Re: [RE-wrenches] SolarBridge microinverter troubleshooting and path ahead for stranded customers

Hi Scot - We've installed lots (too many) of SolarBridge micros, but they've all been through SunPower. SunPower is upholding their warranty. As you mentioned, the monitoring box is a big problem for these systems - they started out with really clunky hardware and or software and it never got

Re: [RE-wrenches] Solar Edge...continuous saga of 181/183 hardware failures...moving on to another inverter.

We've installed lots of Enphase, SolarEdge, and the various string inverters over the years. As far as Enphase goes, our experience is not too far from what Jason described - we had thousands of the M190/M210 generation installed and experienced a very high failure rate. Our failure rate on those

Re: [RE-wrenches] Tesla Powerwall 2.0 - AC Coupling

Tesla's guidelines are 7.6 kW inverter AC rating. August On Wed, Jul 22, 2020 at 12:18 PM Dave Angelini Offgrid Solar < offgridso...@sti.net> wrote: > Schneider uses 1.25 max on an XW for Ac coupling. That would be 1.25 x 6 > kw or 7.5kw max from the grid inverter when ac coupling. > > I doubt

Re: [RE-wrenches] Tesla Powerwall 2.0 - Experience?

course, this > functionality is not yet released on the software, but they have generator > lugs build into their Gateway, so you know they are thinking along these > lines. > > Things are getting very interesting with these "AC Batteries." > > Jason Szumlanski > &g

Re: [RE-wrenches] Tesla Powerwall 2.0 - Experience?

Tesla released new offgrid design and installation instructions April of this year. As a Powerwall dealer, we're under NDA not to share the document, but the Powerwall will now charge from the generator when it hits a certain SOC threshold if the PV is not running. I'm not sure about that caveat

Re: [RE-wrenches] protecting wire below 8'

Hi Kirk - We work in San Francisco where they have a local code amendment: 300.4(I) Add the following section: (I) Subject to Physical Damage. Premises wiring systems installed less than 2.44 m (8 feet) above

Re: [RE-wrenches] MLPE Mapping

Our crews have been doing daily reports that include a Google Photos link of the work they accomplished that day. Creating the shared photos link is so easy now with both Android and iPhone that we've had widespread adoption among our crews. It really is awesome. Anyway, part of their report is to

Re: [RE-wrenches] Enphase intermittent breaker trippjng

Hi Jason - I know I've mentioned this before, but were you able to verify that the branch trunk cable end caps are properly installed? We've had a few cases of intermittent breaker tripping where the end caps were not installed, had fallen off, or not properly installed. A little moisture leads to

Re: [RE-wrenches] Rapid Shutdown Compliance

All - Ray has a good point, the discussion here is really about two different types of systems - mainstream ongrid PV, and small scale (and a relatively small market) offgrid PV. It's really tough to design a small offgrid system (especially DC coupled) with rapid shutdown. I think it's just a

Re: [RE-wrenches] Rapid Shutdown Compliance

Hi Corey - As we've grown, and as our fleet of installed systems has grown, I've become increasingly interested in choosing an inverter solution that shows per-module production data. I realize that you specifically asked not to consider optimizers or microinverters, but I wonder if that will be a

Re: [RE-wrenches] Disconnect spacing

Jason - I'm not understanding what your inspector is pushing back on. The enclosure lid needs to be able to open, the handle needs to be accessible for operation, and NEC 110.26 working clearances need to be maintained. I suppose there may be manufacturer clearance requirements, but I haven't seen

Re: [RE-wrenches] Old & new Enphase communication issues

Nick - Slightly different question related to the same topic - can we buy IQ based MIs for legacy positively grounded SunPower systems? Thanks, August Luminalt On Tue, Mar 10, 2020 at 10:23 AM Nick Soleil wrote: > As Dave mentioned, > > We manufacture M215 and M250 microinverters that are

Re: [RE-wrenches] High Power Split phase inverter/chargers

The Tesla Powerwall system has worked well for us, and be configured up in the 50 kW + range. We've installed several 4-Powerwall systems totalling 20 kW / 54 kWh. In order to get to 50 kW battery inverter capacity, you'd need 10 Powerwalls. Now you can do multiple Gateways on site, so could

Re: [RE-wrenches] Fronius IG4, State 417 error

Wallace, I can't attest to that particular error code. I can attest that many or most of the original Fronius IG inverters we installed ended up failing and have since been replaced. As a general rule, we advise on installing a new model inverter when old out-of-warranty units fail since the

Re: [RE-wrenches] Inverter Output Circuit OCPD Meltdown

Jason - Thanks for sharing - this is a good lesson for all Wrenches. Years ago we had a dual string inverter installation where the DC positives and negatives were mixed between the two interters. String 1 positive went to inverter 1, string 1 negative went to inverter 2 and vice versa. The

Re: [RE-wrenches] Inverter Output Circuit OCPD Meltdown

Hi Jason - It certainly appears that there was some sort of surge or short. We've had a few cases where microinverter branch circuit end termination caps were left off or fell off and shorted out during rain storms. You might want to double check that those are all in place. We've also had cases

Re: [RE-wrenches] NEC 2020 not available as a portable PDF?

I've heard from multiple sources and confirmed myself that you can't get the portable pdf of the NEC starting with the 2020 edition. The link that Lorenzo shared seems to indicate that older versions including 2017 edition are available in a digital format. [image: image.png] August Luminalt

Re: [RE-wrenches] SolarReady Service Panel vs adding Supply Side connection?

Replying on list, I had mistakenly only replied to Jeff off list. -August On Wed, Oct 23, 2019 at 6:26 AM August Goers wrote: > Hi Jeff - I think technically you can try a supply side connection per NEC > 705.12(A) if you can find equipment with provisions to both feed your > existin

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

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

Re: [RE-wrenches] connector mismatch

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Re: [RE-wrenches] connector mismatch

Jason - I'm curious about your statement on cutting off module connectors. Can you elaborate? Best, August Luminalt On Sat, Sep 7, 2019 at 7:52 AM Jason Fisher (STC) wrote: > Kent, I don’t see an answer to Brian’s question about the LG module’s > original connector configuration. We’re these

Re: [RE-wrenches] Power wall

Hi Jay - We are a Tesla Powerwall/Powerpack dealer. We buy equipment direct from Tesla just like any normal vendor relationship and then sell a complete turnkey installation for our customers. Our customers don't buy equipment directly from Tesla. Tesla allows customers to place a deposit for

[RE-wrenches] remote project in northeast India

. Best, August *August Goers* Principal Luminalt Energy Corporation o: 415.792. www.luminalt.com ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://list

Re: [RE-wrenches] Enphase and Tesla Powerwall

their envoy box and SunPower uses the PV Supervisor 6. August On Thu, Jul 25, 2019 at 10:53 AM Marco Mangelsdorf wrote: > Sounds encouraging, August. Mahalo. > > Are any of those systems zero export by any chance? > > marco > > On Thursday, July 25, 2019, August Goers

Re: [RE-wrenches] 230Vac load on OB FX2524T system

Many appliances, motors, AC units, etc are rated for 230 volts, but really they work for our modern 240 volt services. If you do a quick web search, it appears that US standard voltages over the years have morphed from 110 to 115, to 120 volt:

Re: [RE-wrenches] Enphase and Tesla Powerwall

Hi Marco - We have dozens of systems with this combo, so far no problem. Tesla's AC coupling mechanism in general seems to be very robust - we've paired them with many inverter types and brands, and they always seem to couple up during our grid-off tests. Since the vast majority of our systems are

Re: [RE-wrenches] Large Off-Grid Residential System and ciculating currents

Hi William - Yea, your kWh calculation is correct. However, the 16 kWh Blue Ion is comparable to eight L16 (6 volt x 333 Ah each) batteries, not one - nameplate rating. Typically you can go way deeper discharge with the lithium products, so the Blue Ion might be more comparable to sixteen (or even

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