You'll hear myths like "solar panels are made more energy than they produce" or, "solar panels have more carbon footprint than they will offset. None of this is true!

All manufacturing uses energy and has a carbon footprint, and solar panels are no exception.

Renewable power generation repays its carbon footprint during its operation. Unlike fossil fuels, which require carbon-intensive fuels throughout the life cycle of the system.

With the greening of the manufacturing national grid, the manufacturing footprint will get smaller and smaller over time. Solar panel factories also tend to install solar panels on rooftops to provide their own green energy.

Solar power that is used by households or exported to the grid actually offsets the high-carbon gas power generation.

Since 2015, solar panel manufacturing has become more efficient and the grids at manufacturing locations have become greener. So I think the payback time is much less these days.

Monocrystalline solar panels are the most widely used technology. To produce solar panels, it takes a lot of energy to melt the silicon used in the batteries. Other technologies are being developed that use a fraction of the energy, but these are not yet commercialized and are not very efficient.

QCells estimates that their panels will take about 1.5 years to recoup the energy needed for production.

The operating period is approximately 30 years, equivalent to 28.5 years of renewable energy generation.

recycling solar panel recycling

Solar panel components are all regularly recycled materials.

People often ask, "What happens to solar panels at the end of their useful life?". The answer is that they are likely to be recycled.

Because in Australia there are many systems that are going to be scrapped. The market is ready for solar panel recycling. Look at Gedlec, they are currently recycling 95% of their solar panels and will be able to recycle 100% by the end of 2021.

The most sustainable solar systems are those that operate efficiently and last a long time.

Replacing a system before the end of its design life will double the carbon footprint of installing a quality system for the first time.

By using experienced designers, experienced installation teams and quality products for your solar system, you can ensure that your system will last, perform well and be sustainable.

Shingled solar cells follow a similar process as solar roof shingles. They are made by cutting a full size solar cell into 6 equal strips. These cells strips are then assembled and stacked, like roof tiles, to form longer strings of up to 40 cells, depending on the size of the panels. This results in one-fifth (or one-sixth) the usual string voltage (V) but one-fifth (or one-sixth) the current (I). Therefore, by reducing the current flowing through the battery, the resistance is also reduced, and by reducing the resistance, the operating temperature is also reduced. And by lowering the operating temperature, the chance of hot spots forming can be reduced.

Advantages

1. Non-busbar connection

In this arrangement, the cells are directly connected by physical contact, with no visible bus bars and straps required to hold the cells together. In the shingled configuration, nearly 30 meters of busbars and welded joints required by traditional solar panels are eliminated. This reduces the risk of bus failure.

2. Increased Power Harvesting

Spaces between cells are completely eliminated. This removes inactive areas of the panel, which can increase cell resistance and reduce performance. Thanks to more modules, almost 100% can be covered by solar cells, so more light can be collected per surface area.

3. Parallel Cell connection

In a traditional solar panel, individual cells are connected in series. So when the cell is shaded, its performance degrades, and with it the performance of the entire solar panel. In a shingled configuration, cells can be wired in groups and configured in parallel, allowing cells to perform more independently of other cells.

4. The best solar panel aesthetics yet

The main attraction of the Ribbon Cell is its state-of-the-art aesthetics. Without any visible circuitry, their surfaces appear to be made of stained glass. How the solar panels blend aesthetically into the roof is an important consideration for manufacturers. Shingled solar panels are by far the most aesthetically pleasing, second only to IBC solar panels.

Shingled cell technology is compatible with more traditional silicon cell technologies such as full black, half-cut, PERC, HJT, etc. and can accommodate these configurations. At present, this emerging technology represents the highest limit of the development of traditional undoped crystalline silicon solar cells so far.

Grid-Tied Solar

A grid-tied solar system consists of solar panels and a grid-tied solar inverter. This is the most common form of solar installed throughout the world. The solar system generates electricity, this electricity is used in the home and the excess is sent back out to the grid. If the solar generation is not enough to cover demand power will be used from the grid.

Most grid-tied systems will disconnect during a power outage. There are two reasons for this:

1. If the lines are down, it would be dangerous to send electricity back to the grid. There is a chance a line worker could get electrocuted.

2. The grid is used as a buffer for the ever-changing loads in your household. Without a grid connection, the solar inverter wouldn’t be able to manage the varying demand. For example, you are boiling the kettle using all the solar power you are generating, the kettle flicks off, now where does the solar power go if there is no grid? Inverters cannot react that fast.

Hybrid Solar

This system is a mix between a grid-tied solar system and an off-grid system. It consists of, Solar panels, Solar inverter and a battery bank.

A grid-tied send excess solar energy back to the grid. A hybrid system is designed to capture this excess energy and store it in the batteries. This energy can then be used at night or to meet peak demands, reducing or eliminating energy used from the grid.

A major difference between a hybrid system and off-grid system is the battery bank size. An off-grid system will generally have the battery sized to get through a few days of inclement weather, whereas a hybrid system will usually be sized to store enough energy to get through the night until the sun comes out the next day.

As hybrid systems have a battery you would expect to have backup power in the case of an outage. It pays to be careful with components you choose here as some systems will not have the backup function, they are purely to save excess solar power to be used at night. so in a power cut, you will find yourself without power.

If you are unsure about installing a battery or not at first, then that’s no problem at all. Just install a grid-tied system, ensure you have consumption monitoring. Then down the track when you have monitored your system, you will know which battery will be right for your system.

Off-Grid Solar

In some areas, there is no grid to connect to. To supply power in areas without a grid, you need a separate system.

Examples of stand-alone systems are:

Homes that are too far from power lines to connect. Generally, if the house is more than 300m from a power line, it may be worth considering going off the grid.

Cottages in remote areas. They are far from the grid and their only option is to install their own independent power system.

weather station. Often in remote areas, weather stations require their own independent systems.

Radio or telephone antenna. Most of the equipment is located on the top of the mountain to reach the maximum number of people. Connecting power cables to these tops can be expensive, and most of the time it makes more sense to have your own off-grid system.

Off-grid systems include:

• Solar Panels - Power Generation

• Battery Storage - Stores energy for night or off-day use

• Inverter - converts direct current to alternating current for use with common appliances

• Monitoring - Monitor battery charge status and solar input

   

The components we use in off-grid are changing in recent years, mainly in terms of battery types. Lead acid battery packs are traditionally used. In recent years, it has often been beneficial to use lithium batteries such as Tesla, BYD or Pylontech.

In order to avoid damage to the lead-acid battery, it can only discharge about 20-30%. That means a very large battery pack is needed to store energy for several days. With lithium, they can be fully discharged without damaging the battery. This means smaller battery packs and a lower risk of system damage.

Lithium-ion batteries charge much faster than lead-acid batteries, which means that if the sun is out for a short period of time, the lithium-ion battery can make the most of this energy. Lead-acid batteries typically take 7-8 hours to complete a charge cycle, so are often not able to fully utilize the available energy.

Off-grid systems usually also have a generator input. This is a backup in the event of prolonged severe weather. Another advantage of lithium batteries is that in the event that a generator needs to be used, the time the generator will run will be significantly reduced to charge the battery.

Modern off-grid systems are capable of online monitoring. This allows monitoring of the system through a cloud platform, so you can keep an eye on your system from anywhere in the world. At Wanaka Solar, we love this feature because it allows us to keep an eye on your system as well and help you with any queries or system maintenance.

Gel battery is a valve-regulated maintenance-free lead-acid battery. Gel batteries are very strong and versatile. This type of battery produces very little fumes and can be used in places without much ventilation.

How do gel batteries work?

A gel battery is a valve-regulated lead-acid battery in which a predetermined amount of electrolyte is mixed with silica fume along with sulfuric acid. This chemical reaction produces a fixed, gel-like substance that gives these batteries their name. Gel batteries are virtually maintenance-free because they use a valve that opens in one direction, allowing the gas inside to recombine into the water, so there's no need to check top up with distilled water or monitor the water level. Gel batteries are very strong and versatile. They can be safely installed in places with restricted ventilation as their gas/smoke production is very low (nearly zero) meaning you can even install batteries in your home.

Special consideration should be given when choosing a charger for gel batteries, as they charge at lower voltages. Overvoltage can cause malfunctions and performance degradation. The term GEL battery is sometimes used to refer to a sealed, maintenance-free battery marked as a setting on the charge controller. This can be confusing and can lead to the wrong charger selection or wrong settings while charging. If other charging methods such as alternators are used, an appropriate voltage regulator must be installed to control the charging voltage. Typical charging voltages for batteries range from 14.0 volts to 14.2 volts, and float voltages range from 13.1 volts to 13.3 volts.

Advantages of Gel Batteries

Gel batteries are gaining popularity in solar systems for the following reasons:

1.Best for deep cycle applications, typically in the range of 500 to 5000 cycles

2.Maintenance free

3.Spill proof

4.Minimal corrosion and therefore compatible with sensitive electronics

5.Rugged and Vibration Resistant

6.Very safe as there is less risk of sulfuric acid burns

7.Minimum cost per month (cost/months of life)

8.Lowest cost per cycle (cost/life cycle)

Disadvantages of Gel Batteries

1.Can't refill in case of overcharging

2.Requires special charger and voltage regulator

Do not confuse AGM batteries with GEL batteries

Today, AGM batteries are often mistaken for gel batteries because of their many similarities.

1.Both are reconstituted - meaning that the oxygen produced on the positive plate is absorbed by the negative plate. Instead of producing hydrogen, the negative plates now produce water, thus maintaining the water content in the battery. That's why AGM and Gel batteries are valve regulated, sealed, spill proof, maintenance free, vibration resistant and can be installed in any location.

2.The notable difference between the two is the difference in electrolytes. The electrolyte used in gel batteries looks like jelly, while the electrolyte in AGM batteries is absorbed in a glass mat that acts like a separator. Due to the properties of the electrolytes used in gel batteries, the batteries lose power quickly at temperatures below 32 degrees Fahrenheit, whereas AGM batteries work efficiently at low temperatures.

3.Gel batteries are best for deep discharge because they are less acid and protect the plates better than AGM batteries. AGM is more compatible where high current is required

Building-integrated photovoltaics (BIPV) are solar power generating products or systems that are seamlessly integrated into the building envelope and part of building components such as facades, roofs or windows. Serving a dual purpose, a BIPV system is an integral component of the building skin that simultaneously converts solar energy into electricity and provides building envelope functions such as:​

• weather protection
• thermal insulation
• noise protection
• daylight illumination
• safety

 

Applications​   1. Facade – PV can be integrated into the sides of buildings, replacing traditional glass windows with semi-transparent thin-film or crystalline solar panels. These surfaces have less access to direct sunlight than rooftop systems, but typically offer a larger available area. In retrofit applications, PV panels can also be used to camouflage unattractive or degraded building exteriors.
		2. Rooftops – In these applications, PV material replaces roofing material or, in some cases, the roof itself. Some companies offer an integrated, single-piece solar rooftop made with laminated glass; others offer solar “shingles” which can be mounted in place of regular roof shingles.
3. Glazing – Ultra-thin solar cells may be used to create semi-transparent surfaces, which allow daylight to penetrate while simultaneously generating electricity. These are often used to create PV skylights or greenhouses.

 

Benefits of BIPV​

 

The benefits of BIPV are manifold: BIPV not only produces on-site clean electricity without requiring additional land area, but can also impact the energy consumption of a building through daylight utilization and reduction of cooling loads. BIPV can therefore contribute to developing net-zero energy buildings. Turning roofs and façades into energy generating assets, BIPV is the only building material that has a return on investment (ROI). Furthermore, the diverse use of BIPV systems opens many opportunities for architects and building designers to enhance the visual appearance of buildings. Finally, yet importantly, building owners benefit from reduced electricity bills and the positive image of being recognized as "green" and "innovative".

 

Shingled solar cells are solar cells which are cut into typically 5 or 6 strips.  These strips can be overlaid, like shingles on a roof, to form the electrical connections.  The strips of solar cells are joined together using an electrically conductive adhesive (ECA) that allows for conductivity and flexibility.

Shingled solar cell

Shingled solar cell – end elevation

This allows the cells to be connected differently to conventional solar panels, in that, there are no busbars (ribbons) required and the solar cells can be joined together resulting in no gaps between the solar cells.

Shingled solar modules can also be wired differently to conventional solar panels.  Typically, solar cells in conventional solar panels are wired in a series of strings whereas the solar cells in shingled panels can be wired in parallel configuration.

What are the advantages of shingled solar panels?

Essentially the three key advantages of the shingled solar panel design are they produce more power, improve reliability and are aesthetically pleasing.

1. Increased energy harvest

Higher power per square metre

The shingled solar cells do not require busbars across the top of the cells so more of the solar cells are exposed to sunlight.  The cells do not need to be spaced apart like in conventional solar panels so the solar panel area can produce more energy.

Comparison between conventional solar panel and Solaria shingle solar panel

Less energy loss due to shading

Conventional solar panels have the individual cells wired in series so when a part of the solar panel is shaded it can have a significant effect on the level of power output.  By configuring the solar cells in shingles, they can be wired in groups and configured in parallel which significantly reduces the losses caused by shading.

Current flow comparison

Below are some examples of shading and losses for a conventional solar panel and a shingled panel.  The Shingled panels have greater performance except for the vertical shading example.

Outdoor shade testing over a 70-day period has shown that the  shingled solar panel performs between 37 to 45% better than conventional solar panel designs.

2. Better reliability

Low busbar failures

Shingle solar panels do away with approximately 30 metres of busbar and soldered joints that is required on conventional solar panels, so busbar failures are reduced.

Better mechanical performance

Static and dynamic load tests show that the shingle approach is more resistant to failure due to external forces being applied to the solar panel compared to conventional solar panels.

3. More attractive

Shingled solar panels have no visible circuitry which give them clean simple look providing superior street appeal.

Solar bollard lights bring a fresh perspective to landscape design, combining eco-friendly technology with modern elegance. These solar powered outdoor lights are perfect for creating illuminated pathways, cozy garden corners, or vibrant public spaces, all without the hassle of wiring. Their sleek, minimalist appearance effortlessly blends into various outdoor themes, offering a seamless mix of functionality and style.

When thoughtfully positioned, solar bollard lights enhance both safety and ambiance. Whether guiding guests along a winding walkway or spotlighting a flower bed, these solar LED lamps provide a gentle, inviting glow. Adjustable brightness settings allow for a range of effects, from subtle accents for intimate spaces to bright, clear lighting for busy areas like parking lots or patios.

What sets solar bollard lights apart is their commitment to sustainability. By harnessing the power of the sun, they reduce electricity usage and contribute to greener living. Modern designs come equipped with efficient solar panels and long-lasting batteries, ensuring they perform well even on cloudy days. For eco-conscious homeowners and businesses, these lights are a win-win solution.

Maintenance is another area where solar bollard lights shine. Installation is simple, as there’s no need for digging trenches or dealing with complex wiring. Designed with durability in mind, many options are crafted from weather-resistant materials like aluminum or stainless steel. For those seeking an easy-to-manage, stylish lighting option, solar bollard lights are a smart addition to any landscape design.

SLD, Solar Lights Do, is a company that specializes in manufacturing and selling high-quality SLD solar lights. We offer a wide range of efficient and durable solar lighting solutions designed for outdoor use. If you're interested, please visit us at www.solarlightsdo.com. 

The foundation is a critical component of solar ground mounting systems, influencing both the stability and overall performance of the project. For aluminum ground mounting systems, two common options are ground screw foundations (helical piles) and concrete foundations, each with unique characteristics that make them suitable for different applications.

What Are Ground Screws (Helical Piles) in Solar Mounting Systems?

Ground screws are a fast and efficient foundation solution, offering simplicity and adaptability in solar installations.

• Key Features:

✅ Minimal site preparation—piles are driven directly into the ground with specialized equipment.

✅ Faster installation time, ideal for large-scale deployments.

✅ Minimal disruption to the environment, making it easier to adjust or remove if necessary.

Why Choose Concrete Foundations for Aluminum Solar Ground Mount Systems?

Concrete foundations are a traditional and reliable choice for long-term stability in solar systems.

• Key Features:
  ✅ Provides superior resistance to wind and snow loads, ensuring durability.
  ✅ Widely adaptable to various terrains and environmental conditions.
  ✅ Standardized installation processes involving site preparation and concrete curing.

Key Differences Between Ground Screws and Concrete Foundations

Choosing the Right Foundation for Aluminum Ground Mount Systems

The choice between ground screws and concrete foundations depends on your project's unique requirements. Whether you prioritize installation speed, terrain adaptability, or long-term stability, the right foundation will ensure your system's optimal performance.

💡 Have questions or need guidance? Our team is here to support you—feel free to reach out or explore our website for more insights tailored to your needs.

Email: info@winsunsolar.com

WhatsApp :  +86 18805065452 / +86 15005991307

Solar Panel Installations on Metal Roofs: Best Mounting Solutions and Key Challenges

With the rise of renewable energy, metal roofs are becoming a popular choice for solar panel installations in commercial and industrial buildings. However, installing solar panels on metal roofs comes with unique challenges like load-bearing capacity, waterproofing, wind resistance, and more. Let’s explore the best mounting solutions to tackle these challenges for secure and efficient solar panel installations.

Different Mounting Solutions for Metal Roof Solar Installations

When it comes to installing solar panels on metal roofs, choosing the right solar mounting solution is crucial. Here are four commonly used metal roof solar mounting systems, each designed for different roof types and project requirements:

1.Rail-based Mounting Solution

The rail-based mounting solution is widely used for securely installing solar panels on metal roofs. It offers strong load capacity and flexibility, making it suitable for various roof types.

For instance, the L-Foot soalr mounting system ensures even load distribution while maintaining waterproofing with EPDM sealing pads.

The Hanger Bolt solar mounting system, on the other hand, provides enhanced stability by securing directly to the roof’s structural beams, making it ideal for high-load conditions.

2.Mini Rail Solar Mounting Solution

If you’re looking for a more compact solution, the Mini Rail system is an excellent option. Its short rail design reduces material use and transportation costs, making it an efficient choice for many projects. Its cost-effectiveness makes it an ideal choice for companies looking to maximize ROI on solar installations.

This system allows for faster installation and adapts to various roof types. Despite its compact structure, the Mini Rail system is built from durable materials, ensuring long-term reliability and the ability to withstand challenging weather conditions.

3.Rail-less Solar Mounting Solution

For projects that require even fewer materials and components, the Rail-less Solar Mounting System offers a streamlined alternative.

This solution eliminates the need for long rails by using brackets or clamps to secure the panels directly to the roof. This reduces both material costs and installation time, making it a practical and efficient choice for many projects.

4. Non-Penetrating Solar Mounting Solution

For installations where preserving the roof's integrity is a top priority, the Non-Penetrating Solar Mounting System is an excellent option.

By using clamps that attach to the standing seams or ribs of the roof, this solution avoids the need for drilling or puncturing the roof surface. It minimizes water leak risks and helps maintain the roof's structural integrity, making it a reliable choice for metal roof installations.

Making the Right Choice

There are many options for installing solar panels on metal roofs. The key is to select the right one based on the roof type and the specific needs of your project.

Have questions about which mounting solution fits your project? Comment below or reach out to us directly—we’d be happy to help. Don’t forget to follow us for more industry insights on solar panel installations.

Get In Touch

Email: info@winsunsolar.com

WhatsApp :  +86 18805065452 / +86 15005991307