/r/solarenergy

Photograph via snooOG

A Reddit for Solar Power enthusiasts, the latest news on Solar Technology, and "How to" Advice for Solar Energy Production.


The Solar Energy Reddit

Solar energy - radiant light and heat from the sun harnessed using a range of ever-evolving technologies such as solar heating, solar photovoltaics, solar thermal energy, solar architecture and artificial photosynthesis.

It is an important source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending on the way they capture and distribute solar energy or convert it into solar power. Active solar techniques include the use of photovoltaic systems, concentrated solar power and solar water heating to harness the energy. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.

Wikipedia: solar energy


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/r/solarenergy

31,559 Subscribers

1

Door to door solar sales guy's deal looks legit!

Hi All!

I discussed with a door-to-door sales guy over the weekend and his program sounds very good and looks like no brainer so wanted to ask you all for opinions.

First, this is my situation.

  • I live in Southern California and my electric company is SCE.
  • Based on my electrical bill, SCE rate is base 33cent/kwh, and after certain usage, 38cent/kwh. (My usage goes over 33 cents/kwh so I'm paying partially 38 cents option).
  • My electric bill comes out to about $200 per month. Goes up and down depending on the month.

Sales guy's company/deal:

  • Guy works for Sunder Energy (he said he's just broker) and solar provider is Palmetto. Installer is some other company.
  • They will provide the solar panels with battery + electrical panel replacement (currently in bad shape) for free. No cost needed to start the program but it will be charged over 25 yrs contract.
  • Their electrical rate is 28 cents/kwh w/o any increase during the contract (25 yrs).
  • Based on their calculation, when I use the same about ($200 worth) their monthly fee will be about $150 (this includes electric charge, electrical panel replacement fee).
  • Solar panels and battery are theirs, so they will repair and replace if it goes wrong.
  • After 25 yrs, I can either buy those, or make another contract, or have them remove them for free.
  • With the battery system, the electric generation will cover 100% so won't have to pay for SCE bill.

So what I see is I won't have to pay for anything and save some money every month right away. And after a while, it will be more beneficial since my electric rate will stay as is unlike the utility company rate.

Now, it sounds too good to be truth. What am I missing??

Please help!

6 Comments
2024/03/25
22:19 UTC

1

Solar quote upper Mid-West region

Help me evaluate this quote for my roof solar in upper Mid-West region:

Quote. Top 3 large installers in my state $18,500 (from that I will subtract 30% via Tax Credit)

-15 Jinko Solar Tiger Neo N-type 54HL4R-B 425W (6,375 Watts)

-15 Enphase IQ8A-72-2-US

30 year insurance via Solarinsure

Payment schedule: 70% due at project approval, 30% after inspection

How does that look in terms of materials used? Anyone has any feedback on the Solarinsurance warranty?

Any other questions I need to ask to make sure there are "no surprises" when install time comes?

Thanks!

0 Comments
2024/03/25
20:08 UTC

2

Is this a good price?

Found a job that is 1 hour away. And is getting a 21.06KW system

52 405 Qcell panels 52 IQ8+ Microinverters (5) IQ5P batteries Sinclair racking system Smart controller 3 Generator hookup

Ground mount is 200 ft behind the house. Clear open country after the trees.

He told me he is getting charged 84k cash price.

What do you think? And why?

4 Comments
2024/03/24
18:36 UTC

2

Solar panels on roof

Looking for any advice on recommendations for companies in Adelaide, who to use and not use . Also is it worth getting a batterie as it changes the pricing quite a lot ? Thanks in advance

1 Comment
2024/03/24
03:40 UTC

3

Caclulating Solar Efficiency

Does anyone have a good resource to calculate solar power efficiecy based on lat long / topography, etc?

I'm looking at a property on the north face of a hill (not great I know). it's not a super steep hill, but I'm wondering if there is either an online tool to find specific efficiency by lat long or a calculation to use that includes angles and such.

3 Comments
2024/03/23
23:34 UTC

1

Enphase 5p battery installed and up and running. Trying to calculate savings. Battery cost $3,300. Using worst case case assumptions it’s sure looking like a battery only saves PG&E customers on the EVA rate plan/NEM 2.0 only $54.00 over 15 years. Please verify my calculations using my assumptions.

0 Comments
2024/03/23
23:02 UTC

2

Active cooling for Inverter

I have a 6kw sofar solar inverter mounted under the panels on the GI structure. I live in N India so the ambient temps in summer can touch 45°C. Prevoius summer I saw the inverter internal temps reach upto 80°C and some derating also. The inverter has a passive aluminum heatsink with unrestricted airflow, so much can't be done wrt location. Therefore I'm looking to add an active cooling solution. The idea I have in mind is to get a small 10w panel and hook it up directly to a couple of dc computer fans and mount them near the heatsink. This should help dissipate heat faster. If anyone has done something like this or has better ideas please share.

6 Comments
2024/03/23
08:10 UTC

1

Transferring ownership and documentation for solar panels installed on a home being purchased, CALIFORNIA

We are currently in the process of purchasing a home that comes with fully paid-off solar panels. However, the seller does not possess any paperwork for the panels. These solar panels were installed in 2020 by the installer Solcious. The seller lacks documentation because the previous seller did not provide any paperwork to them.
I am eager to ensure that the solar service is appropriately transferred to my name, allowing me to utilize them effectively. Does anyone have prior experience with this process or knowledge of whether I need to submit any forms or formal requests? Any guidance on how to proceed would be greatly appreciated

1 Comment
2024/03/23
05:17 UTC

5

Adding Wind Turbine to Solar

We live in Northern Suburbs of Perth and West of the Freeway. So anyone who lives here will know it is windy all the time! We have 6kW solar on the roof with 3phase inverter to the house/grid. Has anyone added a domestic size Vertical Axis Wind Turbine to their house solar? We have a base power use in the house of about 350W 24h a day so can we supplement solar with wind at night? I’m thinking a 400-600W turbine they are about 1m high. (Assuming council approves!)

1 Comment
2024/03/23
00:24 UTC

2

Solar power Irradiance

I'm looking for solar irradiance data for a specific city and the surrounding area within a 50km radius. Can anyone recommend resources or methods to obtain this data?

4 Comments
2024/03/22
09:45 UTC

5

USDA REAP Grant writers

Anyone know of grant writer(s) to set up commercial applications? Preferably in Ohio

7 Comments
2024/03/21
15:42 UTC

3

Why does my system draw a small amount from the grid everyday?

Hi there I recently got a solar system which I’m in love with. However each day my system - despite having energy to draw from the battery - takes from the grid. About 300w.

Generally throughout the day despite having all the energy to cover and be able to export to the grid I end up playing 8p.

I know this could be based on the supply of energy at any one time but I’m never using anything at the time I can see it’s drawing from the grid 2-5am for that to happen.

I feel like this is just an automatic thing that’s happening - potentially tests are run on my system with my supplier? any thoughts would be super helpful!

15 Comments
2024/03/21
06:23 UTC

2

UCC termination doc

Anyone have good/bad/otherwise experience with your solar company trying to get one of these? I’ve been trying to get one of these from my solar company for the past 10 days without success.

3 Comments
2024/03/21
01:18 UTC

3

Wonderful video explaining about solar and wind. How the Hawaiian Power Grid Works. Enjoy and learn.

0 Comments
2024/03/20
14:54 UTC

0

Questions regarding virtual power purchase agreements

Hi All, I am gathering some information around Virtual power purchase agreements. I have three questions:

  1. How are they different than Powar purchase agreements?

  2. wanted to know if the virtual powar purchase agreement work cross boundary meaning I purchased them in Malaysia and take the credit advantage in Philippines or similarly between any other countries in APAC.

  3. Do you see this market developing in APAC. Which are the countries currently offering virtual power purchase agreements in Asia Pacific?

Thanks!

0 Comments
2024/03/20
00:57 UTC

2

Tesla Powerwall 2 and other battery questions

I produce an excess avg. of 10kw of power per day in Summer in Sydney Australia, is there enough to bother with a battery, I heard a PowerWall 2 won’t require me to add a hybrid inverter. Any knowledge out there folks?

1 Comment
2024/03/19
00:48 UTC

11

Is this solar installation done properly?

Im planning to hire a person to install Monoperc half cut Bifacial panels on my roof. This is one of his prior work. I’ve been told that if there’s fallen leaves on the top, that half of the panel doesn’t produce electricity. Here ,the GI pipes used as support can be seen blocking the bottom side, besides the micro inverters also block parts of it, so doesn’t that reduce production?

18 Comments
2024/03/18
11:10 UTC

1

The Solar Revolution: Powering Up Our World with Sunlight

Hey Reddit fam,

Let's shine a light on one of the most exciting revolutions of our time: the solar energy revolution! 🌞💡

The solar energy revolution is here, offering a clean, reliable, and cost-effective alternative to traditional fossil fuels. With advancements in technology driving down costs, solar power enables individuals to take control of their energy consumption while reducing their environmental footprint. From rooftop panels to large-scale installations, solar energy is reshaping how we power our world, paving the way for a brighter and more sustainable future.

1 Comment
2024/03/18
07:49 UTC

1

Extra panelen voor overcapaciteit of gelijk aan verbruik?

Ik ben van plan een aantal zonnepanelen bij te plaatsen, op dit moment hebben we een systeem van enphase 2 jaar in gebruik en ik kom 1200kwh te kort. Ik ben van plan om 3 á 4 panelen bij te plaatsen. Er is plek voor meer. Raden jullie aan om bijv 6 of 8 panelen te plaatsen?

1 Comment
2024/03/17
19:07 UTC

8

Do any of you clean your solar panels?

I was doing some research online and found that dust and other build up can reduce the efficiency of our solar panels - like 20%. Especially if birds take a dump.

I live in an area that doesn’t rain that often. I know I could just hit them with the hose, but is that enough?

I’d probably pay for a professional to come out and clean them, but didn’t find any on yelp.

Curious your thoughts.

17 Comments
2024/03/17
17:21 UTC

2

Why has my system switched from grid to battery?

The power is not out in our neighborhood, but our system has witched to battery and drawing essentially none from grid. This is quickly draining the battery at night, during a snowstorm (it took some time before we noticed, have now turned most things off, but batter was already nearly 40% drained). Not sure what can be wrong

7 Comments
2024/03/16
03:45 UTC

3

Roof mount vs rack mount

Let's hear it, wjat are your thoughts? Roof mount seems the best option due to space and convenience, but I live in north carolina where we can get some pretty rough and windy storms plus the possibility of a roof leak down the road.. ugh.

5 Comments
2024/03/15
12:46 UTC

4

Solar Panel help for a newbie

Hi friends, I need some help understanding the move to solar. I live in Orange County, CA, and we are often pushed information on a government rebate or solar programs to encourage us to make the transition. Recently, we received a flyer in the mail from a company and pulled the trigger to make a call. They came out to inspect our house, and said that due to the nuclear plant shutting down in San Clemente in 2009, there has been an uptick in solar demand because we are importing energy into California. Essentially, this company - I believe called Vital or LGCY Power, would act as a broker with a company called Freedom Forever to install solar panels on the house. Our understanding is that the solar panel installation costs and warranty would be covered, and they would charge us .34 cents per KwH of power, which they explained is less than what our local electricity company SDGE charges which according to our bill ranges from .38 to .50 (or maybe higher) depending on the peak. I also understand that they may increase the cost of power, and that the solar company Everbright would keep it at a fixed rate.

The problem is I truly don't understand a lot of this. Between Vital/LGCY, Freedom Forever and EverBright, there are a lot of players. We are of course very interested in solar for eco-friendly reasons, and even though .34 cents is not a significant difference, at least we're saving a little and doing our part. But at this point, I'm not sure what additional questions I would have to ask.

I think the thing that confuses me the most is the push and pull with the electric company if we are over and under. It's basic on a surface level, that if our power goes into the grid, they would give us a credit, and if we take power for whatever reason, they would charge us.

My main concern I guess is - avoiding getting double charged for solar and electricity somehow?

8 Comments
2024/03/14
22:50 UTC

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