/r/solarenergy
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
Most of my research seem to summarize APsystems as cost-effective for larger setups, while Enphase is favored for reliability and features. Both are scalable, but Enphase excels in expansion and long-term performance.
I am curious to hear from long-term Enphase and APS systems owners, have they faced any issues with their inverters?
If you had to choose b/w one of them, what made you choose?
Salesperson of APS seem to mention that they had complaints with Enphase inverters leading them to switch to Enphase and also saving costs. Does that sounds about right?
Thanks
I literally have absolutely no lights in my backyard. Anyone have any recommendations on some good source solar lights that will stay on during the night? I’ve found a few but most are black and I was looking for some white ones I can mount.
Does anyone know why my solar does this if full sun?
Anyone have any advice regarding this. We have 5 acres of flat clear ground available. We would love to put it to use in the solar sector. Not sure how to go about it as far as grants? Or just contact electric company directly!?
Thinking about getting solar panels. We live in NC. Pros/Cons? We got two proposals from Renu and Sundance. Anyone used them? This is for our forever home. Any opinion will be appreciated! TIA
Polysilicon
The mainstream concluded price for mono recharge polysilicon is RMB 37/KG, while mono dense polysilicon is priced at RMB 35/KG and N-type polysilicon is currently priced at RMB 41/KG.
Transaction Status: Besides a few deals involving lower-quality polysilicon, the transaction volume for other types of polysilicon has declined. The market is currently in a state of deadlock between upstream and downstream players, with increasing pressure from both sides to lower the prices of polysilicon.
Inventory Dynamics: Inventory levels have risen again this month, now ranging between 290,000 to 310,000 tons. Specifically, leading manufacturers and some mid- to lower-tier manufacturers hold large inventories. However, mid- to lower-tier manufacturers are under significant pressure to consume the inventory, with some considering price adjustments to increase the shipments.
Supply and Demand Dynamics: Downstream production cuts may intensify, while some polysilicon manufacturers undergoing maintenance will gradually resume production. The increasing supply pressure is exacerbating the imbalance between supply and demand.
Price Trend: Polysilicon prices remained stable this week. However, if the supply becomes more surplus, it is likely that manufacturers may be forced to lower prices.
Wafers
The mainstream concluded price for M10 P-type wafer is RMB 1.10/Pc, while G12 P-type wafer is priced at RMB 1.65/Pc. The mainstream concluded price for M10 N-type wafer is RMB 1.03/Pc and G12 N-type is RMB 1.45/Pc. The mainstream concluded price for N-type G12R wafers is RMB 1.20/Pc.
Supply and Demand Dynamics: Manufacturers are continuing to reduce production in unison to stabilize prices. Under the pressure of enormous production capacity, cutting production and clearing out inventory seem to be the only way to stabilize prices. The supply-demand outlook for N-type 183 wafers remains bleak. As downstream module manufacturers switch to produce other sizes of wafers, the market demand for this specification is shrinking, leading to mounting inventory pressure and frequent panic selling among manufacturers. Therefore, wafer prices will continue to be under great downward pressure.
Price Trend: Wafer prices remained stable across the board this week, but the market remains under pressure from ongoing price negotiations.
Cells
The mainstream concluded price for M10 cell is RMB 0.270/W, while G12 cell is priced at RMB 0.270/W. The price of M10 mono TOPCon cell is RMB 0.265/W, while that of G12 mono TOPCon cell is RMB 0.280/W and that of G12R mono TOPCon cell is RMB 0.270/W.
Supply and Demand Dynamics: On the supply side, manufacturers continue to reduce production and clear inventory, with minimal excess supply pressure across various cell sizes. On the demand side, looking into next month, module orders are expected to remain in a state of stagnation, and thus no significant recovery has been observed in orders from leading manufacturers. Overall, the supply-demand balance for cells is relatively stable, and production cuts are expected to continue to keep the supply-demand balance.
Price Trend: Solar cell prices all remained stable this week, and if module prices stabilize, solar cell prices are also expected to stay relatively stable.
Modules
The mainstream concluded price for 182mm facial mono PERC module is RMB 0.69/W, 210mm facial mono PERC module is priced at RMB 0.70/W, 182mm bifacial glass PERC module at RMB 0.70/W, and 210mm bifacial glass PERC module at RMB 0.71/W. The mainstream concluded price for 182mm bifacial TOPCon modules is RMB 0.72/W, and 210mm bifacial HJT modules at RMB 0.86/W.
Supply and Demand Dynamics: On the supply side, module orders have maintained a steady pace with no significant changes. On the demand side, industry association efforts have contributed to price stability, but the cost-line definition still needs further refinement. The non-silicon cost differences between integrated manufacturers and specialized manufacturers have led to varying final production costs across tiers, suggesting that a more reasonable price range may be appropriate. Moreover, current excess capacity in the module segment is already well recognized, and the marginal effect of association-driven stabilization efforts is diminishing. Therefore, manufacturers' competitive edge will still rely on comprehensive strengths in cost management, product quality, and other factors.
Price Trend: Module prices remained stable across all types this week.
Good day I am a desperate user.
The solar system AMEPERE STORAGE PRO was supposed to be ready and working at the end of july. Since then EKD, the seller, keeps delaying service and keeps lying about progress.
The problem is easy - there's no LAN connection to the STORAGE PRO.
Everything else works. We have the Ampere Smart IQ box, I can reach it but it cannot reach the STORAGE PRO for setup.
Also, one of the technicians who was here tried used the AMPERE HOME App to connect to the system via BLUETOOTH. According my research, nothing here has bluetooth, so I am confused even more.
Basically, what I think it is that the settings currently for the STORAGE PRO as a HOSTNAME is ASP-HSR2103J2345E29985.local on port 502 which I think it should be a IP, no?
Any help is appreciated
Google’s new Solar API promises to make rooftop solar estimates effortless. But does it deliver accuracy compared to traditional methods like physics-based modeling?
I put both to the test on a Washington DC rooftop. I found:
🏠 30% difference in rooftop area detection compared to manual estimation
⚡ 77% difference in energy production estimates compared to pvlib
Has anyone had similar experiences with the Solar API?
You can find the full article here: https://benedettogrillone.substack.com/p/is-solar-estimation-now-as-easy-as
You can also subscribe for free to my Substack if you find this content interesting, I usually post twice a month about the intersection between energy, AI, and software.
I periodically share similar analyses on LinkedIn as well: https://www.linkedin.com/in/benedetto-grillone/
Solar energy is a renewable and sustainable power source derived from the sun's rays, playing a crucial role in the transition to cleaner energy solutions. By harnessing solar power through photovoltaic cells, we can convert sunlight directly into electricity, significantly reducing reliance on fossil fuels and lowering greenhouse gas emissions. This transition not only helps combat climate change but also promotes energy independence, as it decreases the need for imported energy.
Additionally, the solar industry creates jobs, stimulates local economies, and offers financial benefits to homeowners and businesses through reduced energy bills and potential income from selling excess power back to the grid. As technology advances and costs continue to drop, solar energy is poised to become a vital component of a sustainable energy future.
I want to know if my setup is correct. Does it show it suppose to be working. Any advice would be helpful. Moved to a new house and they have this setup.
Solar & battery technology can make RV living better.
Here’s two examples…
Example ONE: Mix your batteries.
Today you must choose to one TYPE of battery (Lithium or Lead Acid)… not only that… you must choose one SIZE (example: 100Ah). Not so great if you want to add batteries while keeping your original investment.
Our technology allows Mixed Type (Lithium or Lead Acid)… AND… Mixed Sizes (80Ah, 100Ah or whatever) of batteries in the Battery Bank.
Example TWO: Battery Health info…
We give real-time, insightful Battery Health info for EACH of your batteries. The image below is a preview of the Battery Health info – I won't explain in detail since I hope it's easy-to-understand.
Will these benefit RVers? ...what do you think...
Two years ago i purchased a $40000 system from Freedom Solar which included system monitoring. Following sunpowr bankruptcy I am told that Enphase will be taking over the monitoring portion YET will require a $600 to set up their monitoring equipment. This is not what was promised in my initial contract. Has anyone else faced this absurdity?!
We’re in the city of Chicago and are looking to go solar. I’ve received quotes from 6 different companies. 3 of those have already been eliminated for various reasons. I think I know who to go with out of the comparison below, but need some input on what I might be missing. Each quote has an EV charger install (without the charger cost) included for a detached garage. None of the quotes include a battery. All companies are local rather than a national company coming into our area. I’m slightly concerned about getting wiring to our garage as our entire backyard is paver stones and concrete.
Company 1 Upfront price: $22,869 Incentives: $16,057 Out of pocket cost: $6,812 Panel: Panasonic EVPV420HK2 Micro inverter: Enphase IQ8A-72-2-US (240V) Number of panels: 14 Projected annual production: 8,017 kWh Parts warranty: 25 years Labor guarantee: 25 years Production guarantee: 25 years Google reviews: 4.7 Yelp: 4.4 Solar Reviews: 3.3
This is the only company listed that came out and visited the property for the EV charger.
Company 2 Upfront price: $19,643 Incentives: $14,651 Out of pocket cost: $4,992 Panel: Trina 420 Watt Photovoltaic Modules Micro inverter: SE5000H-US SolarEdge w/ S440 optimizer Number of panels: 12 Projected annual production: 6,630 kWh (141% usage) Parts warranty: 25 years Labor guarantee: 15 years Production guarantee: 2 years Google review: 4.8 Yelp: 4.6 Solar Reviews: 3.9
This company was recommended by a friend as they have been really happy with their install. I want to go with this company for that reason alone, but I have the lowest confidence in the panels compared to the other options.
Company 3 Upfront price: $18,159 Incentives: $14,359 Out of pocket cost: $3,800 Panel: REC - REC420AA PURE 2 Micro inverter: Enphase IQ8X-80-M-US (240V) Number of panels: 12 Projected annual production: 7,051 kWh Parts warranty: 25 years Labor guarantee: 25 years Production guarantee: Only covered under parts warranty Google review: 4.8 Yelp: 5 Solar Reviews: 4.4
This company stated right away that they have a larger client base with different branches dealing with different types of customers (business vs residential vs larger installs). As a result, they order larger quantities and get a lower rate on equipment, which why they’re able to come in lower than competitors. Other companies stated their production guarantee. This company does not offer one themselves, but pointed to the parts guarantee.
Current status I’m currently leaning toward Company 3. If I eliminate company 2 based on the panels alone, that leaves Panasonic and REC, both with the same micro inverters. Company 3 is cheaper and has better overall reviews across platforms.
What am I missing?
We are currently facing a dire need to transition towards renewable energy sources, in order to combat the growing threat of climate change and reduce our dependence on depleting fossil fuels. However, this transition is not just about implementing new technologies, but it also involves understanding and adapting our economies and power systems to support a sustainable and renewable energy future.
To gain a better understanding of this transition, the University of Michigan offers a free online course on "Understanding Renewable Energy", where learners can explore the different aspects of renewable energy and how it can be integrated into our existing systems. This course is designed to provide a comprehensive overview of renewable energy technologies, their potential, and the challenges faced in their implementation.
One of the key areas of focus in this course is understanding the economics of renewable energy. This includes looking at the cost-effectiveness of different renewable energy sources, as well as the economic implications of transitioning towards a more sustainable energy system. Learners will also explore the concept of energy markets and the role of policies and regulations in promoting the adoption of renewable energy.
Another important aspect covered in the course is the integration of renewable energy into existing power systems. This involves understanding the technical and operational challenges of integrating intermittent energy sources, such as solar and wind, into the grid. Learners will also dive into the concept of energy storage and its role in maintaining a stable and reliable energy supply from renewables.
Apart from these, the course also delves into the social and political aspects of renewable energy. It discusses the impact of renewable energy on communities, job creation, and the role of different stakeholders in promoting sustainable energy practices. Learners will also gain insights on how different countries are approaching the transition to renewables and the lessons we can learn from their experiences.
This course is not just limited to theoretical knowledge, but it also offers real-world examples and case studies to help learners understand the practical applications of renewable energy. Participants will have the opportunity to engage in interactive discussions and collaborate with a diverse group of learners from around the world. The course is self-paced, allowing individuals to learn at their own convenience.
By the end of the course, learners will have a holistic understanding of renewable energy and its potential for a sustainable future. They will also be equipped with the knowledge and skills to identify opportunities and challenges in transitioning towards a renewable energy system, and how to navigate them.
In conclusion, as the need for renewable energy becomes more urgent, it is essential to not only adopt new technologies but also adapt our economies and power systems to support this transition. The University of Michigan's free online course on Understanding Renewable Energy offers an excellent opportunity to learn about the various aspects of renewable energy and how they can be integrated into our existing systems. By gaining a comprehensive understanding of these concepts, we can take steps towards a more sustainable and renewable energy future for generations to come.
Does anyone know if it makes sense to sell your own SRECs versus just letting your solar company broker it and take care of it for you? Seems like all the sites related to this are also owned by solar companies. Any info would be appreciated! Thanks!
I have been given a task to amdesign a microgrid system for 4 houses and 6 streetlights and was wondering how can i get the energy consumptions of these imaginary houses. Do i pick what electrical appliances these houses would use and estimate based off of that or just get the average house consumption in my country.
Andi would like to know all possible sensors for this system and how to use rasbperry pi in such design.
Also any sites row techniques to calculate battery capacity and how many solar panels and batteries required.
I have a meeting with my team tmrw and need the info quick, if u are willing to further help and need more details about my design you can dm me.
If you commissioned a solar installation in 2020, at the time of the 26 percent tax credit - are you now able to claim the additional 4 percent since the inflation reduction act increased the credit value again? Or are we out of luck for bad timing.
Not asking for tax advice, you beed not be a CPA - but source documents would be helpful!