/r/solar

Photograph via snooOG

Discussion of solar photovoltaic systems, modules, the solar energy business, solar power production, utility-scale, commercial rooftop, residential, off-grid systems and more.

Solar photovoltaic technology is one of the great developments of the modern age. Improvements to design and cost reductions continue to take place. How efficient will it become? When will it become so affordable that it's accessible to everyone? How are other energy industries having an effect on solar pv?

Welcome to the Solar Subreddit

Before submitting posts in this subreddit, read the current subreddit rules, suggestions, and helpful links post which is stickied to the top of the post list


This subreddit is for solar photovoltaic (PV) professionals, owners, and enthusiasts. The solar module and the systems it drives - whether small residential installations or large, utility-scale power plants - is one of the great inventions of the modern age. Steady improvements in materials, design and labor have dramatically lowered costs, module efficiencies have improved gradually as well - both serving to make the technology much more competitive against fossil fuels in recent years. What changes when solar PV is combined with batteries? What is the global impact of solar PV on the overall energy industry? When will solar become affordable for all? Shine on you brilliant solar enthusiasts!

Be sure to check out our wiki for more solar information and resources.

Tip for help requests - because of variances in things like regulations, prices, and amounts of solar radiation, it is useful to provide general location info such as country and state when asking for help/info regarding your solar project.

Solar Links

Solar Job Training Resources

* The Solar Career Mapping Tool - This is an interactive Solar Career Map offered by the Interstate Renewable Energy Council (IREC). It is designed for workforce professionals, educators, policymakers and job seekers. See - http://www.irecsolarcareermap.org

* Clean Energy Training Directory - Training providers, workshops, undergraduate degree programs, graduate programs, and more. Searchable by country, state, and technology. See - https://irecusa.org/credentialing/credential-holders/

Find the latest Help Wanted feature post HERE which includes links to several industry job listing sites

/r/solar

162,031 Subscribers

1

SolarEdge HDWave LAN connectivity

Hi, my SE7600H inverter’s communication board stopped working (found out when the app stopped getting data updates). It’s connected via LAN with a Ethernet cable. The board no longer even had the LCD running. So I bought a communication board to replace it. This new board seems to connect to Google.com as per the LAN status code but won’t connect to the SolarEdge servers.

Any idea if SolarEdge somehow is rejecting the new board because it is not recognized? Maybe if the server is validating the MAC address of the Ethernet interface and not recognizing the new one?

Attaching status messages

SRV prod2.solaredge.com PORT 22222

Server: LAN Status: 11110000 Server 3 Ping Failed

As per the SE document here, this means that the inverter is able to ping Google.com but not SolarEdge servers.

https://kb.solaredge.com/wp-content/uploads/Support/US/Communication_Installation_Troubleshooting/LANCommunicationTroubleshooting.pdf

Thanks for any clues!

2 Comments
2024/11/20
04:48 UTC

3

Turn my wired fountain into a solar fountain?

I fell in love with a very expensive wired fountain and then realized I have no where to plug it in. Can I turn it into a solar-powered fountain? Is it hard to do?

1 Comment
2024/11/20
04:14 UTC

8

25 year lease contract: can I get out?

My mom signed a 25 year contract with a solar panel company. Unfortunately her roof got severely damaged and now she needs to remove the panels to fix the roof. The solar company is asking her for $7k for removal.

She is really upset by this and wants to get rid of the solar panels. Can she get out of it?? It’s a lease.

19 Comments
2024/11/20
02:51 UTC

5

Thoughts, Concerns, opinions

So on island, there are a number of installers but without the selection that the US or other countries might have. This is proposed hardware for 60kw/day and 28kw/night power. There would be 30 Jinko panels and 2 EG4 batteries.

Opinions from those who’ve used Victron/EG4/Jinko?

3 Comments
2024/11/20
00:12 UTC

1

Who is the best utility scale solar EPC company in India

In terms of professionalism and competitiveness

0 Comments
2024/11/19
23:34 UTC

1

Question on Financing (NJ)

I am currently shopping for a system - got some quotes off energy sage and another from another company. I am curious on how the financing works? Im waiting for the full proposal from the company from energy sage, but the non ES company i delt with with financing said the system they wanted to give me (21kwh) was 95000 financed, and thats theres no way that another company could do it for 47k financed. He stated that the financing fees are usually 30-40 percent.

To me this seems crazy, but I figured I'd ask here if this is accurate?

12 Comments
2024/11/19
22:29 UTC

1

3 options: 1 x Ground Mount, 2 x Roof Installs

Last 12 month energy use: 15,500kWh (includes 2 winter months where the air source heat pumps weren't yet active as primary heat). Other future electric load could be switching propane stove for induction/electric. House is 3700sq ft in Vermont.

Proposal 1 (2 x Ground Mount) - Well regarded local company - $63,000 before gov incentives.

  • 2 Suspension PV Tracker
  • 32 Axitec PV modules, 410 DC Watts each, 13,120 Watts total
  • 2 Fronius Primo 6.0 kW inverter
  • Expected annual production 19,100kWh
  • Annual Service plan required after Year 1 ($150/year)

Proposal 2 (Roof Mounted) - well regarded local company - $42,180 before gov incentives

  • 33 Silfab 54 Cell 430 Watt black/black module (QD Prime) 14,190 Watts total
  • 1 SolarEdge Home Hub 11.4kW grid-tied inverter with Revenue Grade Monitoring
  • 33 SolarEdge S500B DC Optimizer
  • Expected annual production 16,750kWh

Proposal 3 (Roof Mounted) - Freedom Forever reseller - $59,754 before gov incentives

  • 46 QCell Q.PEAK DUO BLK ML-G10+ 410 18,860 Watts total
  • 46 Enphase IQ8HC-72-M-DOM-US (240V)
  • Expected annual production 19,170kWh

Note: I'm currently leaning towards Proposal 2, they also supply Q.PEAK DUO BLK ML-G10+ or Q.TRON BLK M-G2+ panels, and Enphase inverters that I could ask them to quote instead. I may add batteries to the install too. Energy supplier has good net metering, but any credit at the end of each year is forfeited.

Secondary question: I currently have a Kohler whole house generator. If I decide to go ahead with a battery system and to integrate the generator, does that influence which way I should go with other components?

Thoughts or recommendations?

11 Comments
2024/11/19
22:06 UTC

0

Tesla Inverter + PowerWall 3 vs. Enphase microinverters + NEM

I’m torn between 2 setups. They are roughly the same cost.

  1. I can either go with a Tesla string inverter + a PowerWall 3. Concerns I have are that I will have a several arrays on a complex roof so it seems like a single inverter is not ideal. Also, the inverter failure rates but obviously people with problems will complain more online that those with no problems. Also the 12.5 year warranty is annoying because it will certainly fail before 25 years and that will be out of pocket. Same with the PowerWall at 10 year warranty. On the other hand I already have a Tesla vehicle and love the app so being able to monitor in a single app is nice—but is it worth it?

  2. or I can go with enphase IQ8+ microinverters, no battery, and just rely on NEM. Concerns would be that NEM is never guaranteed to continue (but I could get a battery then right?). Also adding 38 inverters (for 38 panels) means more potential points of failure. And if a microinverter fails in the middle of the array, they’ll have to remove additional panels. Also, NEM won’t help in a complete power outage. On the other hand, enphase has a 25 year warranty and the installer will cover labor costs to fix an issue for 25 years—they are a reputable company that I believe will survive but who knows. Also, the microinverters will give me the ability to monitor at the panel level.

17 Comments
2024/11/19
20:46 UTC

1

Considering a system from Solar SME (specs inside). Any thoughts about components/pricing? I don't know a whole lot about solar so figured I'd ask you guys.

Offered Solution:

43 x Canadian Solar 455W Tier-1 All Black Panels

Sol-Ark Smart Hybrid Inverter (15K-2P)

EG4 PowerPro Wallmount 14.3kWh Battery

19.565kW System size

22,800 kWh Solar generation

Price:

Gross: $55,000

30% FTC: $16,500

Duke Energy rebates: $9,000

Net Cost: $29,500

1 Comment
2024/11/19
20:23 UTC

2

Is there a way to replace the film on a solar panel?

I have a small panel that has a very thin film that seems to be peeling off very rapidly. Is there anything I can replace it with? A friend of mine suggested rubbing some oil on it. His theory is that it will create a small haze on it that simulates the film, but I'm not convinced. Thanks for any help.

1 Comment
2024/11/19
19:54 UTC

2

Solar Batter + Gas Generator Automatic Switching?

As the title implies, I am looking for a way to have my cabin switch automatically between gas generator and Anker Solix F3800 whole home battery. When we built our cabin, we built a shed about 70 feet from the dwelling, installed a 6Kw gas generator and ran lines underground to a L14-30p port on the side of the cabin going in to the breaker box. There are also 3 doorbell switches (momentary switches) hooked up in a back room to allow remote start, stop, and choke of the generator. We now have an Anker Solik F3800 and a 1200W solar tracking setup that works wonderfully. What I would like to have happen is the ability to start the generator (which is hooked directly to the Anker pack for 120v wall charging if its been cloudy and we run out) and have it switch the power to the cabin to the gas generator, and then switch back to the Anker when the gas generator is shut down. The closest I have been able to come to finding anything that would work is in the link below. It would require modification to the exisiting cables. What I am asking reddit is does an automatic power switcher exist with L14-30p plugs, like for an RV, where I can wall mount the unit, and run two short L14-30p cables from each generator to the switcher, and have the output also be a L14-30p plug. If it comes down to hiring an electrician to do the install, so be it, but a plug and play setup would be amazing, and I just cant find it. Thank you in advance for any helpful insights. Heres the link: https://www.amazon.com/Power%E3%80%81Generator-Overcurrent-Protection-Overvoltage-undervoltage/dp/B0C85N8X14/ref=pd_ci_mcx_mh_mcx_views_1_image?pd_rd_w=gN6ep&content-id=amzn1.sym.bb21fc54-1dd8-448e-92bb-2ddce187f4ac%3Aamzn1.symc.40e6a10e-cbc4-4fa5-81e3-4435ff64d03b&pf_rd_p=bb21fc54-1dd8-448e-92bb-2ddce187f4ac&pf_rd_r=ZCCWCZH3YP8CXXZBR27A&pd_rd_wg=Av8cC&pd_rd_r=f2114253-9cf2-4b85-92db-5bc0c620c039&pd_rd_i=B0C85N8X14

I am editing this post because I forgot to mention that the Anker Solix does NOT have passthrough charging. I knew this when I purchased it. I would like to be able to have full power to the cabin via gas generator, and have the gas generator dump charge into the Anker Solix, then automatically switch back to solar. Currently I have to go to the shed, shut everything down, transfer the L14-30p plug, and fire both battery and gas generators, run it for an hour or so, and repeat that switching process. Its a chore.

0 Comments
2024/11/19
18:58 UTC

6

Any Consensus on the Best Residential Solar Brand(s)/Setup/etc.?

Any Consensus on the Best Residential Solar Brand(s)/Setup/etc.? It seems every provider has a equal number of lovers and haters — which isn’t particularly helpful. If someone had to commit to a residential solar setup today, what should it be?

27 Comments
2024/11/19
17:09 UTC

1

Calculating the required power of the solar panel

https://preview.redd.it/0dcofh9o3u1e1.jpg?width=3024&format=pjpg&auto=webp&s=a182c24b327fc1e0cd4ca5090a9974240af8020d

I have a consumer on the USB port that requires around 8A in 24 hours at 5V. See picture with measurement.

Now I would like to charge a battery via a solar panel and supply the device with the necessary power from there.

What power does the solar panel have to have and what kind of batteries do I have to use so that there is enough power for about 2 days even in slightly worse weather?

2 Comments
2024/11/19
10:21 UTC

0

Prices

If I recall correctly I read something on Reddit indicating that solar prices might be coming down? Is there any truth to that and if so why are the prices expected to drop? I’m in the US. I’m looking to add more panels to our existing system plus add a battery or two. Should I try to move quickly on this or wait a bit?

34 Comments
2024/11/19
07:56 UTC

1

couple of weeks ago man came to our house about installing solar panels and my mom & her bf are thinking about it, guy said the installation is about 8-10k how do i know if this guy trying to scam or not ?

idk what company hes from and i dont know what companies are good to recommend to my mother where i live in arizona any suggestions?

so i just found out the solar company its these two https://golightreach.com/ https://palmetto.com/products/lightreach i want know what you all think?

59 Comments
2024/11/19
00:51 UTC

2

Thoughts our experiences with EG4 batteries

I have been receiving mixed feedback on EG4 wall mount batteries from installers:

- Installer 1 (Potential Seller) - We have not experianced any issues with them. We are a Tesla premier installer and do many of those installs and we experience no higher rate of issues.

- Installer 2 (Eventually no bid) - We do a lot of work with EG4s and have a ton of issues with them. With that said we pickup and support a lot of solar installations abandoned by other installers going out of business and a lot of DYI off grid installs. As such the high failure rate could be largely due to unqualified installers but we do not have the visibility to say that is the reason they have high issues. Just that they do...

Price for these batteries are attractive. At ~ 4k installed for 14.3 rated KWH or practically 11.5 KWH this appears to be one of the cheaper solutions in the marketplace. They have a 15 year warranty.

Those with experience with these batteries please let me know what you think about them.

11 Comments
2024/11/19
00:40 UTC

1

Recs for Milwaukee area company?

Looking for a company that comes recommended in the Milwaukee area. About 20 minutes south of the city. Thanks!

3 Comments
2024/11/18
23:01 UTC

3

Install Costs

I got a few bids on a system install. The first I felt was a pretty decent bid but then coming and exploring here, it was about $3.25 per watt installed and most folks here suggest that anything over $3 per watt is paying too much. So I got another quote that was significantly higher, ($4.50 per watt) and if I wanted a non-Tesla battery option that would go up due to needing to install the enphase inverters under the panels.

I have limited roof space so would only be able to install about 13 panels, which amounts to 50% of my current use. I imagine if I could install closer to 100% offset the cost would come down significantly since a lot of the install costs are fixed.

I'm in the Pacific NW, and the two other mitigating factors here would be that my home is three stories and the roof pitch is right around 40 degrees.

With all the above in mind is $3.25 per watt too much to pay? Is the second quote (from a highly regarded and recommended installer) completely out of line? I appreciate any thoughts. Electricity is still cheap here but it has been going up exponentially lately. I'm also nervous about the new admin changing the tax credits before I can take them, since I would sign in 2024 but install would be early next year.

All of the installs used Silfab 430 QD panels.

Also my three battery options were between Tesla PowerWall, Enphase and PointGuard. I think the PointGuard is most impressive - cost is comparable to Tesla but a smaller footprint and appears to be easily expandable - if anyone has thoughts on that.

Appreciate all thoughts.

17 Comments
2024/11/18
22:04 UTC

7

Voltage on gutters

The jist. This issue has been ongoing for years without any source resolution from Tesla; I seek the REASON and not just the suggested band-aid to ground it out. I have a variable swing of AC voltage 0v-80v going to ground off my gutters (80 was the highest I ever recorded), yes AC voltage. This gutter voltage is 0v at night and it is variable during the day based on suns intensity. Tesla engineers say it isn't possible yet here I am with errant variable AC voltage that a Tesla engineer confirmed onsite through a visit. Teslas states to ground all the gutters but this does not answer the source of the voltage. And to cut you off before you even state there has NOT been a nail driven through any wire because the voltage directly correlates to the suns intensity and I wired my own house and am intimately aware of my infrastructure. I have derived my own scientific reasoning on what is happening yet I have not found anyone yet that shares my take. I am accepting of being wrong yet before I know I am wrong I am seeking to understand the source. I just went out and measured the gutters again, 50.3v AC, see the picture for my claim. When I took these the inverter was outputting 2000 watts continuous.

28 Comments
2024/11/18
21:24 UTC

0

What are some reputable solar companies in the U.S. that offer partnership opportunities for selling their services?

Looking to partner with established solar companies to sell their services remotely. Any recommendations for companies with good partner programs?

2 Comments
2024/11/18
20:36 UTC

2

NSG Solar quote feedback

After going back n forth with various providers, I shortlisted NRG and was going through contract, there are additional costs to have conduit and backup capabilities which I didn't realize. Are these fair cost?

8.28 kW system (REC REC460AA Pure-RX) with 1 Powerwall - $30693

Tesla Backup Capability - $1250 (Tesla Switch if it can be used) otherwise $2500 (Tesla Gateway)

Conduit for wiring pathway - $2070

220v outlet - $1400

11 Comments
2024/11/18
19:01 UTC

0

Solar roofs that integrate with slate...

We have a slate roof, and I would be very interested to have parts of it replaced with an integral solar roof, specifically over a leaky porch and garage section. This would salvage enough tiles for nearly endless repairs elsewhere. Is there an integral solar roof that can fit within an old slate roof (not sitting on top, but simply replacing rectangular sections)?

The backup plan would be to have the porch replaced with metal and solar panels placed over top of that. Unfortunately, it would need to be copper. The next-tier plan would be exploring a new integral slate+solar roof, such as from Greenstone Slate with Nu-lok, but I have mixed feelings about whether I really should redo the rest of the roof if an archive of replacement tiles might last me 25 years of repairs anyway, until the next solar replacement.

9 Comments
2024/11/18
18:28 UTC

15

Mystery load

There’s a strange draw on our system of nearly a kilowatt that can’t be accounted for. It started when we had our inverter replaced. The old one, a Pika, stopped working but was still under warranty so the installer came and replaced it with a new one, now Generac since they bought out Pika. Our average load is less than a kilowatt, usually in the 500 watt range but since getting the new inverter it’s double that. Here’s where it gets weird: looking at the readout on the inverter panel, the energy usage spikes when the panels get full sun. Early morning, cloudy day, evening, around half a kilowatt. Sun comes out and boom it jumps. I had the company come out and look at it but of course it was overcast that day. I’ve tried turning off all the circuits on the breaker and there’s still power being consumed. It’s driving me nuts. My wife thinks I’m paranoid and now the solar company probably thinks so, too. Has anyone had an experience like this?? Picture of our house for attention

14 Comments
2024/11/18
18:14 UTC

1

SOLARMAN app

Hi,

I’m sure this is a stupid question but I’ve taken over a system which is using the SOLARMAN app to monitor and control it however I’m struggling to find any sort of guide online.

I was advised by the previous owner that in winter I can utilise cheap overnight rates to top up the battery.

What is the difference between AcPChgMax and AcSocMaxChg within the setting for this?

Thanks

2 Comments
2024/11/18
16:39 UTC

3

Blowing Fuses

Hello, I'm experiencing an issue with my Huawei Backup Box. When I simulate a power failure by disconnecting the mains, the system switches to battery power as expected. However, during this transition, the fuses in both my alarm system (rated at 125mA) and garage door motor (rated at 2A) blow. This problem occurs exclusively during the switch from mains to battery power, not when reverting back.

My setup includes a Huawei SUN2000-3.68KTL-L1 inverter, a Huawei Backup Box-B0, and a Huawei LUNA2000 battery. I've isolated all circuits, leaving only the alarm system connected, but the issue persists. Given that the alarm operates at low currents, significant inrush current seems unlikely.

Has anyone experienced similar issues with fuses blowing during power transitions with the Huawei Backup Box? Any insights or recommendations to resolve this problem would be greatly appreciated.

1 Comment
2024/11/18
16:26 UTC

0

How many micro-invertors do I need for 90 panels?

Hello

I am about to purchase Solar Panels and Microinverters. I am looking at the IQ8 Series
How many Microinverters would I need for 90 panels?

If I purchase Panels that produce 550 W of power, which inverter is capable of handling this?

40 Comments
2024/11/18
16:19 UTC

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