====== Examples: ======
https://www.energy.gov/eere/solar/how-does-solar-work
Smart Flower
https://www.facebook.com/fossbytes/videos/763308576220981/?mibextid=rS40aB7S9Ucbxw6v
Solar Tracker
Solar Tracker and EcoWorthy Bifacial
https://uk.eco-worthy.com/products/bifacial-195w-12v-monocrystalline-solar-panel?utm_content=Facebook_UA&utm_source=facebook&variant=45820908798192&media_type=image&utm_medium=paid&campaign_id=23853844230500431&ad_id=23853911109360431&utm_id=23853844230500431&utm_term=23853911109310431&utm_campaign=23853844230500431
https://www.solarnplus.com/
Tindo Solar
https://www.pv-magazine-australia.com/2025/05/19/australian-made-panel-tops-consumer-groups-product-test/
The Choice power output test revealed the 410 W monocrystalline passivated emitter and rear contact (PERC) solar panel delivered 417 W, while the other solar panels in the review produced less than the manufacturer’s claimed output.
https://www.pv-magazine-australia.com/2022/08/19/tindo-unveils-australian-made-410-w-solar-panel-with-20-6-efficiency/
N-TYPE BIFACIAL
https://www.pv-magazine-australia.com/2024/09/03/tindo-unveils-australian-made-n-type-bifacial-module/
**PERC**
reliability, manufacturability and business **risk—passivated emitter and rear contact (PERC)** cells
https://www.pv-magazine.com/2025/05/13/beyond-the-hype-why-perc-still-powers-a-stronger-solar-future/
**Tunnel oxide passivated contact (TOPCon) solar cells**
https://www.solarnplus.com/topcon-cell-technology-what-is-it-and-how-it-works/
#:~:text=TOPCon%2C%20short%20for%20%E2%80%9CTunnel%20Oxide%20Passivated%20Contact%2C%E2%80%9D%20is,employ%20n-type%20silicon%20doping%2C%20which%20offers%20several%20advantages.
There are several types of solar panels, with the main categories being monocrystalline, polycrystalline, and thin-film. Each type offers different levels of efficiency, cost, and durability, making some better suited for specific applications.
====== Here's a breakdown of the different types: ======
https://www.energy.gov/eere/solar/solar-photovoltaic-cell-basics
**1. Monocrystalline Solar Panels:**
**Description:** Made from a single, continuous crystal of silicon, giving them a uniform, dark appearance.
Efficiency: Generally the most efficient type of solar panel, converting sunlight into electricity more effectively.
**Cost:** Typically more expensive than polycrystalline or thin-film panels.
Durability: Known for their longevity and ability to withstand high temperatures.
Best for: Residential and commercial installations where space is limited and maximum efficiency is desired.
**2. Polycrystalline Solar Panels:**
**Description:**
Made from multiple silicon crystals melted together, resulting in a speckled, blue appearance.
Efficiency:
Less efficient than monocrystalline panels, but still offer good performance.
**Cost:**
More affordable than monocrystalline panels.
**Durability:**
Generally durable, but can degrade slightly faster than monocrystalline panels at high temperatures.
**Best for:**
Applications where cost is a primary consideration and space is less of a constraint.
**3. Thin-Film Solar Panels:**
**Description:** Created by depositing a thin layer of photovoltaic material onto a substrate like glass, plastic, or metal.
**Efficiency:** Less efficient than crystalline silicon panels, but offer advantages in flexibility and cost.
**Cost:** Typically the least expensive option.
Durability: Can be more susceptible to degradation over time.
Best for: Large-scale installations like solar farms, where cost and flexibility are important factors.
**Other types of solar panels include:**
**Bifacial solar panels:**
These panels can generate electricity from both the front and back sides, increasing energy production.
Perovskite solar panels:
These are a newer technology with promising efficiency gains but are still in the early stages of development.
**Solar tiles:**
These are designed to look like traditional roofing tiles, offering a more aesthetically pleasing option.
Concentrator Photovoltaics (CPV):
These panels use lenses or mirrors to focus sunlight onto a small, highly efficient solar cell.
====== Structure and composition of solar cells within modules: ======
https://www.renogy.com/blogs/buyers-guide/n-type-vs-p-type-solar-panels
solar cell – that light may be reflected, absorbed, or pass right through the cell.
The PV cell is composed of semiconductor material; the “semi” means that it can conduct electricity better than an insulator but not as well as a good conductor like a metal.
exposed to light, it absorbs the light’s energy and transfers it to negatively charged particles in the material called electrons. This extra energy allows the electrons to flow through the material as an electrical current. This current is extracted through conductive metal contacts – the grid-like lines on a solar cells
**The efficiency** of a PV cell is simply the amount of electrical power coming out of the cell compared to the energy from the light shining on it, which indicates how effective the cell is at converting energy from one form to the other.
**the bandgap**, which indicates what wavelengths of light the material can absorb and convert to electrical energy. If the semiconductor’s bandgap matches the wavelengths of light shining it's 100% efficient...
Crystalline **silicon** cells are made of silicon atoms connected to one another to form a crystal lattice. This lattice provides an organized structure that makes conversion of light into electricity more efficient.
Solar cells made out of silicon currently provide a combination of high efficiency, low cost, and long lifetime. Modules are expected to last for 25 years or more, still producing more than 80% of their original power after this time.
**Thin-Film Photovoltaics**
A thin-film solar cell is made by depositing one or more thin layers of PV material on a supporting material such as glass, plastic, or metal. There are two main types of thin-film PV semiconductors on the market today: **cadmium telluride (CdTe)** and **copper indium gallium diselenide (CIGS)**.
**Perovskite Photovoltaics**
Perovskite solar cells are a type of thin-film cell and are named after their characteristic crystal structure. Perovskite cells are built with layers of materials that are printed, coated, or vacuum-deposited onto an underlying support layer, known as the substrate. They are typically easy to assemble and can reach efficiencies similar to crystalline silicon.
https://www.pv-magazine-australia.com/2025/09/08/first-graphene-claims-major-boost-for-perovskite-solar-cell-efficiency/
**Organic Photovoltaics**
Organic PV, or OPV, cells are composed of carbon-rich (organic) compounds and can be tailored to enhance a specific function of the PV cell, such as bandgap, transparency, or color. OPV cells are currently only about half as efficient as crystalline silicon cells and have shorter operating lifetimes, but could be less expensive to manufacture in high volumes
**Multijunction Photovoltaics**
Another strategy to improve PV cell efficiency is layering multiple semiconductors to make multijunction solar cells. These cells are essentially stacks of different semiconductor materials, as opposed to single-junction cells, which have only one semiconductor.
Each layer has a different bandgap, so they each absorb a different part of the solar spectrum, making greater use of sunlight than single-junction cells. Multijunction solar cells can reach record efficiency levels because the light that doesn’t get absorbed by the first semiconductor layer is captured by a layer beneath it.
While all solar cells with more than one bandgap are multijunction solar cells, a solar cell with exactly two bandgaps is called a tandem solar cell. Multijunction solar cells that combine semiconductors from columns III and V in the periodic table are called multijunction III-V solar cells.
Multijunction solar cells have demonstrated efficiencies higher than 45%, but they’re costly and difficult to manufacture, so they’re reserved for space exploration. The military is using III-V solar cells in drones, and researchers are exploring other uses for them where high efficiency is key.
**Concentration Photovoltaics**
Concentration PV, also known as CPV, focuses sunlight onto a solar cell by using a mirror or lens. By focusing sunlight onto a small area, less PV material is required. PV materials become more efficient as the light becomes more concentrated, so the highest overall efficiencies are obtained with CPV cells and modules. However, more expensive materials, manufacturing techniques, and ability to track the movement of the sun are required, so demonstrating the necessary cost advantage over today's high-volume silicon modules has become challenging.
Learn more about photovoltaics research in the Solar Energy Technologies Office, check out these solar energy information resources, and find out more about how solar works.
https://www.energy.gov/eere/solar/photovoltaics-research-and-development
https://www.energy.gov/eere/solar/solar-energy-resources
https://www.energy.gov/eere/solar/how-does-solar-work
====== Solar PV Efficiency 1 ======
https://www.amazon.co.uk/ECOFLOW-175W-High-Efficiency-Waterproof-Photovoltaic/dp/B0DHK1QNGL
Overview
+11
EcoFlow 175W Rigid Solar Panel
To determine the efficiency of your 175W solar panel, you need to
compare its actual power output to its rated power under standard test conditions (STC) and also consider real-world factors
. Efficiency is typically expressed as a percentage, indicating how well the panel converts sunlight into electricity.
**Here's a breakdown of how to assess your panel's efficiency:**
**1. Understand Standard Test Conditions (STC):**
STC involves testing panels at 25°C, with 1000 W/m² of sunlight, and an air mass of 1.5.
These conditions allow for a standardized comparison of different panels.
**2. Measure or Estimate Power Output:**
Real-world conditions:
Track the panel's actual power output (in watts) over time using a monitoring system or multimeter.
Compare to rated power:
Your 175W panel has a rated power output under STC. Compare this to your measured output.
Factors affecting output:
Real-world conditions (like temperature, shading, and sunlight intensity) will cause variations in output.
**3. Calculate Efficiency:**
Efficiency formula:
Divide the panel's actual power output (under your conditions) by its rated power (175W) and multiply by 100 to get a percentage, according to soly-energy.co.uk.
Example:
If your panel produces 140W, the efficiency would be (140 / 175) * 100 = 80%.
**4. Consider Efficiency Factors:**
Temperature: Higher temperatures can decrease panel efficiency.
Shading: Any shading on the panel will significantly reduce its output.
Panel degradation: Over time, panels can experience a slight decrease in efficiency.
Inverter efficiency: The inverter's efficiency in converting DC power to AC power is also a factor.
**5. Monitor and Analyze:**
Inverter monitoring:
If your system has an inverter with monitoring capabilities, it will display power output, allowing you to track performance.
Consider professional testing:
If you suspect a significant issue, a qualified technician can perform more in-depth testing.
By monitoring your panel's output and understanding the factors that affect it, you can get a good sense of its efficiency and identify any potential issues.
This video explains how to test solar panels:
====== Solar PV Efficiency 2 ======
In the UK, solar panel efficiency for domestic systems generally ranges from
15% to 23%, with some high-efficiency panels reaching up to 25%
. Monocrystalline panels are typically the most efficient, often exceeding 20%. Polycrystalline panels are also common but tend to be slightly less efficient, around 15-17%.
**Factors Affecting Efficiency:**
**Panel Type:**
Monocrystalline panels are known for their higher efficiency compared to polycrystalline panels.
**Quality:**
High-quality panels tend to maintain a higher percentage of their original output over time.
**Installation:**
The angle and orientation of the panels on a roof can impact efficiency, with a pitch of 30-45 degrees being optimal for domestic systems in the UK.
**External Factors:**
Weather conditions (sunlight, temperature) can also influence how much energy a solar panel can generate.
Efficiency Over Time:
While solar panel efficiency can decrease slightly over time, high-quality panels are designed to retain at least 80% of their original output after 25 years, according to Glow Green.
Measuring Efficiency:
Solar panel efficiency is expressed as a percentage and indicates how well the panel converts sunlight into electricity, says Solar Guide.
A higher percentage means the panel is more efficient at converting sunlight into usable electricity.
====== Business Case ======
Solar Power generates Electricity from sunlight in a process known as ‘photovoltaic effect’
kWp or kW capacity = amount of power the system could generate under optimal conditions.
KWh = amount of electrical energy generated over a given time frame.
HEADINGS:
- What is solar PV?
-
- Why should you consider it for your business?
-
- How can you determine if it is right for you?
-
- What are the potential obstacles?
-
- How do you find an installer?
-
- How to assess the financial viability and carbon savings?
-
- How you maximise the system’s performance?
-
- Where can you go for more information?
====== Why Solar PV? ======
Efficiency: Generating Electricity to direct use is efficient offsetting electricity supplied by the grid
Cost effective: Amount of money paid for electricity exported to the grid is lower than that for electricity purchased from the grid.
Well-suited to industrial settings: Large roof areas and substantial on-site demands supports the financial case, conversely for a domestic market....
Long-term electricity price certainty: Solar PV reduces your reliance on grid supplier electricity and potential future price shocks.
Very Small consumers: (0-20 MWh)
Small consumers (20-499MWh)
Small/Medium consumers (500-1999MWh)
Medium consumers (2000 –19,999 MWh)
Large consumers (20,000 – 69,999 MWh)
====== How much Solar PV is right for you? ======
Consumption:
What is your consumption profile?
Total consumption
Opportunities to shift demand profile
Potential for batteries
====== Optimising solar PV capacity ======
Identify the maximum potential capacity of your roof (avoiding rooflights, existing rooftop plants on commercial and industrial buildings).
Compare this to your baseload electricity demand
Consider reducing the system capacity, or changin the orientation to increase consumption.
Consider integration of batteries.
The table below shows a summary of the costs, percentage of generated energy consumed on site and paybacks.
The site has an annual electricity consumption of 200 MWh, purchasing price of 42.2p/kWh and export price of 5.6p/kWh
Est. annual energy savings
Est. Other income/ costs
Total Annual Savings (£)
Investment Cost (£)
Simple payback (years)
Opportunity
% Generation consumed
kWh
£
O and M
Export Income (£)
102.6 kWp array
74.5%
57,500
£28,500
£1000
£1300
£27,500
£115,100
4.2
62 kWp array
92%
50,300
£21,200
£500
£200
£20,600
£70,800
3.4
===== Brands =====
https://uk.renogy.com/renogy-100-watt-12-volt-flexible-monocrystalline-solar-panel/
https://uk.jackery.com/products/solarsaga-100w-solar-panel
https://bluettipower.co.uk/collections/solar-panels
https://uk.eco-worthy.com/products/bifacial-195w-12v-monocrystalline-solar-panel
**[Bifacial Energy Yield up to 33%]**:Bifacial solar panels are designed with a transparent back of 12BB solar cells, the back panel uses composite materials, the light transmittance up to 91.5%, the conversion rate of 23%, the power generation is 858Wh per day under ideal conditions, compared to traditional solar panels, the power can up to 33%.
[Easy to Install]: Size: 52.6 x 26.4 x 1.4 inches (1335*670*35mm), weight 20.48 Lbs. Diodes are pre-installed in junction box, with a pair of pre-attached 2.95ft Cable.
[Transparent Back Panel]: Almost 91.5% transimittance makes the back panel well convert sun scattered light even when the front side is shaded, which is widely chosen to be used in sunroom, entrance canopy, farm greenhouse and motorhome.
[Solid Components]:The back panel, made of composite material, is windproof and snow-resistant. The metal aluminum frame is rust-proof and anti-corrosion. And the pre-installed hole design makes it easy to install.
===== Recycling =====
**Reclaim**
https://www.pv-magazine-australia.com/2021/12/03/australian-solar-module-manufacturer-commits-to-recycling-strategy/
====== Generation considerations: ======
===== Angle and Pitch =====
https://www.viridiansolar.co.uk/resources-1-3-tilt-and-orientation.html
https://blog.spiritenergy.co.uk/contractor/best-angle-solar-panels-uk
The ideal angle for solar panels in the UK is generally between 30° and 40° from horizontal, with a southward orientation. While 30° is a good starting point, the specific angle depends on your location's latitude and whether you want to maximize summer or winter energy production.
Find the Perfect Angle for Solar Panels UK in 2024 - MAK ...
Add 15 degrees to your latitude for winter and subtract 15 degrees for summer.
Example:
For London (latitude ~51°), winter optimum is around 66°, summer is 36°, and a good average for year-round is around 40°.
**South Facing:**
For south-facing panels, a pitch of 30° to 50° is a good starting point.
**Roof Pitch:**
Most UK roofs fall within the 30° to 50° range, which is suitable for solar panel installation.
**Adjustable Panels:**
If you can adjust the panel angle throughout the year, you can achieve optimal performance in both summer and winter.
**Orientation:**
South is the best orientation, but southeast or southwest can still be effective.
Flat Roofs:
Flat roofs can be used with adjustable mounts to achieve the optimal angle.
In summary, while 30-40 degrees is a good general guideline for solar panel angle, adjusting for your specific latitude and desired seasonal performance can optimize your energy output.
Generation varies on a daily and seasonal basis.
Peak generation tends to be during the middle of the day and in the summer months.
Generation still possible during shorter daylight in the winter.
Electricity consumption data is useful for understanding your patterns of demand during the day, week and year and how this could compare to generation.
Freely available tools: PVGIS (http//re.jrc.ec.Europa.eu/pvg_tools/en)
Upload consumption data option allows you to estimate how much electricity you may use
Energy Output = Energy consumed on-site
Energy not captured = Energy exported to grid
===== Solar Trackers =====
Smart Flower https://www.facebook.com/fossbytes/videos/763308576220981/?mibextid=rS40aB7S9Ucbxw6v
https://en.wikipedia.org/wiki/Solar_tracker
https://www.google.com/search?q=solar+trackers&sca_esv=abfa54d360d79d5a&ei=s8deaIaeHo28hbIPpO6UiQ4&ved=0ahUKEwjGw8rVg5KOAxUNXkEAHSQ3JeEQ4dUDCBA&uact=5&oq=solar+trackers&gs_lp=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&sclient=gws-wiz-serp
==== FREE TOOL SITES: ====
Solar Wizard; PVGIS; Spirit Energy
How do you assess the financial viability?
Estimate the amount of electricity you are likely to use directly:
Have a go with the different tools available such as PVGIS tool in the UK
===== ====== Capital costs: ====== =====
Check your quotes include all capital costs, e.g grid connextion costs, and scaffolding costs etc
Operational costs:
Operations and maintenance costs, asset management and insurance need to be considered
Development costs:
These costs include, structural surveys, planning permission costs, any grid application costs
Payback calculations:
Simple paybacks are simple to calculate, paybacks of less than ten years are often achieved.
Consider finance options
Any Grants – Whole / or in part Match finding initiatives
Simple payback = Capital expenditure + Development expenditure OVER Electricity Savings + Income from Electricity Export – Operating Expenditure
====== Electricity Savings: ======
Estimate the proportion of the electricity that you think you will use.
Use this to estimate how many kWh you think you will use
Multiply this by your electricity import price
Income from electricity export (you will need a grid export connection)
Estimate the proportion of the electricity that you think you will export
Use this to estimate how many kWh you think you will export
Multiply this by what your electricity export price is likely to be
Operational costs:
One needs to consider costs for asset and performance management, insurance, operations and maintenance, cyclical replacements
====== KEY ELEMENTS: ======
Roof Mounted Solar PV can be both financially beneficial and reduce carbon emissions
Solar PV Capacity in the UK has grown substantially over the past 15 years and is forecast to grow even further over the next 5-10 years
The amount of electricity generated varies on a daily and seasonal basis.
Incorporating batteries, or other energy storing technology, can improve flexibility.
Planning permissions and procurement processes are straightforward and mature.
Relatively low risk installations, using proven technology with reliable financial returns, but ensure that you undertake performance management.
====== SUMMARY AND CONCLUSIONS ======
Initial feasibility: Compare your demand to potential generation
Initial design: Obtain quotes and initial designs
Identify and secure funding: Discuss with internal/external funders
Optimise and de-risk: Optimise, investigate roof and planning, secure grid
Installation: Install panels and monitoring equipment
Ongoing monitoring: Carry out daily monitoring
Things to consider when a developing a solar project:
Solar Wizard: Social Wizard: Considerations for larger-scale PV projects
Solar Energy UK: Corporate Buyers’Guide
====== Tips on finding an installer ======
Renewable Energy Consumer Code: Top Tips for Consumers
Information on Microgeneration Certification Standards (MCS) and an installer handbook.
MCS: Standards and Tools Library
Information on supply chain sustainability:
Solar Energy UK: Solar Supply Chains: Sustainability Issues and Action
====== Costs of and revenues: ======
UK Government (DESNZ): Solar photovoltaic (PV) cost data
Solar Energy UK: Smart Export Guarantee League Table
Ofgem: Smart Export Gurantee Guidance for generators
Information on operations and maintenance:
Solar Energy UK: Rooftop Operations and Maintenance Best Practice
How do you ensure your system operates effectively?
Gather half-hourly generation data
Compare this to relevant environmental data
Does the generation match your expectations?
If not, why not?
Review the data on a daily basis, to pick-up and resolve any issues quickly
Monitor, record and validate key data
Ensure contractors meet / surpass contract term
Supervise compliance
Ensure adequate insurance and effectively manage insurance claims
Keep an operational diary
====== Installer Auctions ======
Auction Update The auction took place in May. The auction is the result of several months of preparation; much of the work for the auction is done prior to the auction day itself, as interested installers are subject to a strict qualification procedure to be able to bid. During the qualification process, as well as verifying that the interested installers have necessary certifications and insurances, we also investigate the financial stability of the businesses, and their customer satisfaction results. As we progress through the qualification, we also work through each installer’s detailed method of approach to ensure that they would be able to manage the logistics and operational demands of the scheme. This process also enables the installer to scope the delivery in detail, and identify opportunities for efficiencies in the scheme, thus supporting their ability to offer competitive pricing. After the auction we meet with the winning installer(s) & review their bid before finally validating it. Bid validation involves a review of the product specifications of all the chosen products to ensure they meet our product standards, validation of the assumptions behind the bid and a review of the supply chain in place. The bid validation process is a vital part of ensuring quality in the scheme. During the auction, we also identify a backup installer, to have on hand for additional offers if the winning installers capacity is met before the acceptance window has closed. In the rare case that this happens, the backup installer would have the scheme pricing of the original winning installer. 2 Local Installer Outreach The Installer Management (IM) team took the following steps to attempt to recruit West Midlands-based installers to Solar Together: 1. We requested a list from MCS of all installers that had registered >200 installations from March 2024 to March 2025 a. 200 installations is the minimum threshold for entry into the Solar Together qualification process 2. The list was filtered by location – this revealed 8 installers based in West Midlands a. 5 installers were immediately discounted due to having an insufficient online presence and/or low customer review scores b. 1 installer was discounted due to being a commercial-only installer c. 2 installers were contacted, with no response 3. Based on the West Midlands filtering, we expanded our reach to include installers based in areas – this revealed a further 23 installers a. This filtering was done on the basis of including installers within a 1-2 hour driving time of area b. 6 installers were immediately discounted due to not having passed the qualification in the recent past c. 13 installers did not respond to the outreach contact d. 4 installers entered the qualification process Of the installers that entered the qualification process: • 3 did not pass our Step 1 screening o This was predominantly due to not having completed a sufficient number of installations in the past 12 months o This is likely due to the MCS numbers including other technologies, rather than purely solar PV and/or battery installations o One of the disqualified installers had also proactively applied to the scheme as a result of council outreach • 1 installer reached Step 3 qualification but did not pass the Method of Approach and interview stage o The installer is being supported with a view to be eligible for future schemes in the Midlands 3 Auction Result The auctions results are confidential and are not communicated publicly until offers go out in batches from Tuesday 27th May. The winning installers for Solar Together West Midlands 2025 are • Infinity Renewables • UPS Solar Infinity Renewables is based in West Sussex and has completed more than 10,000 installations through Solar Together in Devon, Essex, Hampshire, Surrey, Sussex, West of England and Wiltshire. Although based in West Sussex they do operate a warehouse in North Somerset where they will lead the West Midlands scheme from. UPS Solar has delivered more than 250 installations through Solar Together in Cheshire & Warrington and is based in Lancashire. The price achieved for this scheme starts at £3,124 for a 4-panel system (510 Wp side). With a split region the pricing is levelled so all customers will pay the same price per installed kW for solar PV systems. This means that even where installers don’t offer the same product sets, the customer pricing will be equalised across the region. However, it can mean for example that customers in sub-region A are offered 370Wp panels, and customers in sub-region B are offered 380Wp panels. The price per installed kW that each group of customers pays is the same, but the total price per panel will be proportionally higher for sub-region B to account for the additional 10W per panel. Installer Split Installer allocation is split by postcode. Please see below the postcode region split between the installers:
