What Are the Top Design Highlights of Tesla Powerwall 3?

by | Sep 16, 2024

At Ceiba Renewables, we’re excited to introduce the Tesla Powerwall 3 — a next-generation battery that not only eliminates rare earth metals but offers remarkable flexibility with its programmable inverter. This feature helps us navigate the unknowns of the G99 application process required by the Distribution Network Operator (DNO) when installing Powerwalls, ensuring your home can safely integrate with your home and disconnect from the grid during outages.

The Powerwall 3 charges at 5kW but can output up to 11.04kW to power your home from solar energy or export to the grid (subject to DNO approval). These capabilities optimise energy use, reduce grid dependency, and offer savings.

In this post, we’ll break down key design considerations to help you understand how the Powerwall’s settings work together to maximise your system’s efficiency.

Key Tesla Powerwall 3 Components

 

Solar PV kWp Rating

The kilowatt-peak (kWp) rating measures your solar panels’ maximum output under optimal conditions. A 6kWp solar system, for example, can produce up to 6kW in peak sunlight, helping meet your household power needs and storing excess energy.

Maxeon Home Solar Power System residential pv

Image: New Maxeon Home Solar Power System

G99 application image

G99 Setting: Battery Output to the House

The G99 setting determines how much power the Powerwall can send to your home & the grid. The Powerwall 3 can supply up to 11.04kW, but this will require approval from your DNO. Once the DNO have assessed the application, the output might need to be limited to 3.68kW, 5kW, 6kW, 7, 8, 9, 10 or 11.04kW to comply with DNO requirements.

G100 Export Limit Setting

The G100 limit governs how much excess energy can be exported back to the grid. Depending on local grid rules, this limit may be set at 3.68kW but could go as high as 11.04kW with DNO approval. Any solar energy produced beyond this limit is “clipped,” meaning it’s neither used nor exported.

G100 Export Badge

Image: G100-2 Certified Badge

Battery Charge Rate

The Powerwall 3 charges at a rate of 5kW, allowing it to efficiently store energy from solar panels or the grid for later use.

Real-World Example: Gerry’s Setup

Let’s take Gerry as an example:

  • Solar PV Setup: 13.2kWp solar panels (10kW West-facing, 3.2kW South-facing).
  • Powerwall 3: Storing excess solar energy.
  • G100 Export Limit: 3.68kW.
solar panel installation planned design 13.2kWp

Image: Gerry’s Solar System

On a sunny day, his panels might produce up to 13kW. The Powerwall charges at 5kW, leaving 8kW for household use or export. If Gerry’s home only uses 1kW at the time, 7kW is available for export, but due to the 3.68kW export limit, 3.32kW will be clipped.

Clipping: What It Means for Your System

Clipping happens when your system produces more solar power than can be used in the home and exported. In Gerry’s case, 3.32kW was clipped. Although this might sound like a loss, it only occurs during peak production meanwhile in lower light conditions the PV system can produce more power than a lower output system. Homeowners can also offset clipping by using excess energy for high-demand activities like charging an electric vehicle (EV). The Tesla Wall Charger and Zappi EV Chargers are ideal for this!

Future-Proofing Your Tesla Powerwall 3 Setup

To prepare for future energy needs:

  • Cable Sizing: Use the right cables (e.g., 16mm² for an 11.04kW output) to handle future Powerwall upgrades.
  • G99 Applications: To unlock the full 11.04kW output, you’ll need DNO approval. This process can take time and isn’t always guaranteed, but it can enhance your system’s flexibility and potential for financial returns, especially with energy trading.

Key Takeaways

When designing your Tesla Powerwall 3 system:

  • Lower output settings ensure regulatory compliance but may limit energy use and exports.
  • Higher solar PV ratings generate more energy but could lead to clipping during peak production.
  • Your system’s settings will depend on your energy needs, local DNO requirements, and future goals.

Choosing the 11.04kW output option may require extra time for DNO approval, and we may need to resubmit applications if approval is denied.

Next Steps

We’ll tailor your Tesla Powerwall 3 system based on your specific needs and DNO limitations. Here’s an example of how your settings might look:

Setting Example Value
Solar PV Rating (kWp) 13.2kW
Battery Output (G99) 11.04kW
Export Limit (G100) 3.68kW
Battery Charge Rate 5kW

Feel free to reach out with any questions or to learn more about optimising your Tesla Powerwall 3 system!

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Will Tesla Powerwall 3 Transform the UK’s Energy Market?

by | Jun 7, 2024

The upcoming release of the Tesla Powerwall 3 is expected to significantly impact the UK’s energy landscape. Tesla, a leading provider of home solar panels, is continuing to advance sustainable energy solutions with its latest Powerwall technology. The Powerwall’s efficient solar energy storage, adaptability to different setups, and contribution to energy security have already made a noticeable impact in the United Kingdom.

The upcoming launch of the Powerwall 3 in Scotland and across the UK has sparked a lot of excitement among homeowners, clean energy enthusiasts, and environmental advocates. This new solar energy battery storage system is designed to work seamlessly with solar panels and other renewable energy sources. It’s expected to give households more control over their energy usage while also reducing their carbon footprint. With its improved efficiency and advanced features, the Tesla Powerwall 3 is set to change the way we use renewable energy systems in the UK. Its anticipated release by the end of 2024 is a big step towards a more sustainable future.

Powerful Key Features and Specifications

Below are some of the key similarities and differences between Powerwall 2 and Powerwall 3.

 

SIMILARITIES

 

  • Storage Capacity of 13.5kWh of Usable Power per Powerwall
  • Scalable (adding a second Powerwall gives you 27kWh of storage capacity)
  • Whole House Backup
  • Can be Installed Outside (recommended Best Practice from IET & MCS)
  • Advanced Battery Cooling for Maximum Durability, Lifespan and Performance
  • Tesla’s (mostly) excellent installer and customer Technical Support

Technical details

The Tesla Powerwall 3 boasts impressive features and specifications that set it apart from its previous models. With a nominal grid voltage of 120/240 VAC and a grid type of split phase, it operates at a frequency of 60 Hz. The Powerwall 3 incorporates robust overcurrent protection with a 60A device and offers excellent surge withstand voltage on both AC ports (4 kV) and communication ports (2 kV). It also demonstrates impressive radiated RF immunity at 35 V/m.

One of the standout features of the Powerwall 3 is its exceptional efficiency. It boasts a solar-to-battery-to-grid round-trip efficiency of 89% and a remarkable solar-to-grid efficiency of 97%, ensuring minimal energy losses during operation. The Powerwall 3 supports various islanding devices, including Backup Gateway 2, Backup Switch, and Gateway 3, enhancing its versatility and compatibility.

Connectivity is a strong suit of the Powerwall 3, with Wi-Fi (2.4/5 GHz), dual-port switched Ethernet, and cellular (LTE/4G options available. It also features a hardware interface with a dry contact relay, Rapid Shutdown (RSD) certified switch and 2-pin connector, and RS-485 for meters. The AC metering is revenue-grade, ensuring accurate measurements with a precision of +/- 0.5%.

In terms of safety, the Powerwall 3 incorporates an integrated arc fault circuit interrupter (AFCI), Isolation Monitor Interrupter (IMI), and PV Rapid Shutdown (RSD) using Tesla Mid-Circuit Interrupters, providing comprehensive protection against potential hazards. Customers can conveniently monitor and control the system through the Tesla Mobile App.

The Powerwall 3 offers a 10-year warranty, ensuring long-term reliability and peace of mind for users. With a maximum solar STC input of 20 kW and a withstand voltage of 600V DC, it can handle substantial solar power input. [5] The PV DC input voltage range is 60-550V DC, while the MPPT voltage range is 60-480V DC, accommodating a wide range of solar panel configurations. It features three MPPTs, each capable of handling a maximum current of 13A and a maximum short-circuit current of 15A.

The Powerwall 3 boasts a nominal battery energy of 13.5 kWh, a maximum continuous discharge power of 11.04 kW, and a maximum continuous discharge power off-grid (PV only, -20°C to 25°C) of 11.04 kW. Its maximum continuous charge power is 5 kW, and the output power factor rating is configurable from 0 to 1, allowing for grid code compliance. With a maximum continuous current of 48A and a load start capability of 185A LRA (1s), the Powerwall 3 can handle substantial power demands. Additionally, the system supports power scalability, with up to four Powerwall 3 units supported, enabling users to expand their energy storage capacity as needed.

Please note, some of the above information subject to change once PW3 has been launched in UK.

DIFFERENCES

  • The system offers AC- and/or DC-coupled flexibility, making it suitable for new installations and retrofit projects.

 

Direct DC Coupling

Direct DC Coupling

The Powerwall 3 integrates directly with solar panels, featuring an integrated solar inverter for a more efficient setup and eliminates the need for an additional solar inverter, reducing the required power conversions. In a system with direct DC coupling, the solar energy generated by the panels goes straight into the Powerwall 3’s battery, avoiding the need for additional conversions. This direct charging of the battery results in higher efficiency, with the Powerwall 3 boasting an impressive 96-97% charging efficiency compared to the 92-93% efficiency of the Powerwall 2.

Increased System Efficiency

The direct DC coupling of Powerwall 3 with solar panels contributes to increased overall system efficiency. By eliminating the need for multiple power conversions, the system minimises energy losses, allowing us to harness more of the solar energy generated by our panels.

We can see the efficiency gains when examining the power conversion process in detail. With a DC-coupled system, the solar energy generated by the panels is directly stored in the Powerwall 3’s battery, with charging losses typically less than 3%. In contrast, an AC-coupled system like the Powerwall 2 requires power conversion from DC to AC at the solar inverter and then from AC to DC during battery charging, resulting in a combined loss of around 7%. Additionally, when discharging the stored energy, there is a further 3% loss from converting DC to AC. By minimising these conversion losses, the Powerwall 3’s DC-coupled design achieves a higher round-trip efficiency, allowing us to maximize the utilization of our solar energy.

Moreover, the integrated solar inverter in the Powerwall 3 offers additional benefits. With six Maximum Power Point Tracking (MPPT) inputs, the system can efficiently handle shading requirements across various installations, ensuring optimal solar energy capture. Furthermore, the Powerwall 3’s integrated inverter is programmable, with an output range of 3.68 kW to 11.04 kW, providing greater flexibility in system design and compliance with grid restrictions imposed by District Network Operators (DNOs).

  • The system offers AC- and/or DC-coupled flexibility, making it suitable for new installations and retrofit projects.
  • It demonstrates improved efficiency in DC-coupled systems, with specific efficiency metrics to be confirmed.

Improved Energy Efficiency

The Powerwall 3 stands out for its impressive round-trip efficiency of 97.5%. This means it can store more solar power before sending it to the grid, which helps minimize energy wastage. Tesla likely achieved this by combining the inverter and battery system, removing the need for an external inverter and improving the overall system design.

  • It utilises a distinct cell technology that eliminates the use of rare earth metals.
  • The integrated solar inverter delivers various advantages, including improved energy conversion, streamlined data viewing through a single application, and cost efficiency compared to third-party inverters.

Integrated Solar Inverter

The new Powerwall 3 now includes a built-in solar inverter, a significant change from the Powerwall 2, which previously required a separate solar inverter. This new design offers several advantages:

1. More efficient: Connecting solar panels directly to the Powerwall 3’s integrated inverter reduces power conversion losses, making the system more efficient.

2. Easier to monitor: The integrated inverter allows users to monitor and control both the solar and battery systems through a single Tesla Mobile App, making everything easier to manage.

3. Saves money: Eliminating the need for a separate solar inverter saves users money, making the whole solar and storage system more affordable.

In addition, it has 3 individual solar connections, allowing for a maximum solar input of 20 kW or 6.6 kW per connection. This is an improvement from the previous Powerwall Plus model, allowing for more efficient shade mitigation and installing a larger number of solar panels at once. Also, the Powerwall 3’s inverter is programmable, with an output range of 3.68 kW to 11.04 kW. This flexibility allows users to adjust the output to comply with DNO grid restrictions, increasing the chance of getting approval for grid connections that may have been rejected before by SPEN or SSE. This feature promises access to the desired solar and storage system.

  • While marginally higher priced than the PW2, when paired with a solar PV system, overall costs are expected to be lower due to inverter-related savings.
  • It will offer a non-backup option, reducing costs for customers who do not require backup functionality during power outages.
  • Furthermore, advanced features are anticipated within the next 12 months. Detailed information is pending, and updates will be shared once available.

BENEFITS

 

Back Up Power

The Tesla Powerwall 3 provides whole-home backup power during grid outages, ensuring uninterrupted power supply to essential appliances and systems. Its Storm Watch feature automatically charges the battery to maximum capacity during stormy weather, offering peace of mind during potential power outages.

Energy Independence 

The Powerwall 3 enables greater energy independence by allowing storage and use of excess solar energy, reducing reliance on the grid. By combining it with solar panels, you can produce clean energy, reducing carbon footprint and insulating from energy price changes and supply chain disruptions.

Cost Saving

Whether you are a business or a homeowner, saving money by storing solar energy during peak hours when electricity rates are higher can lead to significant cost savings and a reduced carbon footprint. Less reliance on the grid will not only maximise the use of solar energy but lead to substantial long-term savings on electricity costs. The integrated solar inverter further contributes to cost savings by eliminating the need for a separate third-party inverter.

Monitoring and Control

Making smart choices about your energy has always been challenging. The Tesla app gives you more control over your total energy usage and generation. It helps you adjust your energy needs and performance, giving you the power of real-life involvement in managing. It feels good knowing that investing in sustainable energy solutions benefits you and the environment.

Expected Launch and Availability

As a leading Tesla Powerwall Installer, we can’t hold our excitement for the upcoming Powerwall 3 in the UK market. Tesla opened orders for the Powerwall 3 in the US in March 2024, and we’re excited to announce that it will soon be available in the UK, which is expected by the end of 2024. As a trusted partner, we’ll be among the first to offer this cutting-edge technology to our customers well before it hits the mainstream market.

It’s important to note that the Powerwall 3 will not be compatible with existing Powerwall 2 setups. This means that for customers interested in upgrading to the Powerwall 3, a completely new system will need to be installed, as the two generations cannot be combined or integrated.

Act now and join our exclusive waiting list to become part of the future of energy solutions!

Get ahead of the curve as Tesla Energy UK gears up for a major announcement this summer. As confirmed by an Ofgem employee in a recent conversation, we expect an exceptional surge in orders as Tesla revolutionises the energy industry. Powerwall 2 units are currently in stock, and we are eagerly anticipating the arrival of the Powerwall 3.

 

SECURE YOUR PW3 SPOT NOW ENQUIRE PW2

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Maximising Longevity and Performance of Solar PV Systems | Ceiba Renewables Scotland

by | Jan 8, 2024

A well-functioning and effective solar photovoltaic (PV) system is a result of diligent planning, professional installation, and ongoing maintenance. As an investment in both your property’s value and our planet’s sustainability, it is crucial to ensure that your solar PV system operates optimally throughout its lifespan. By focusing on long-term performance, you can maximise both the financial and environmental benefits that solar energy has to offer.

In this article, Ceiba Renewables provides valuable insights and practical advice on maintaining the performance and longevity of your solar PV system. We will discuss the factors that influence solar panel lifespan, as well as preventative measures and best practices for preserving the efficiency of your system over time. Our goal is to empower you with the knowledge and guidance needed to enhance your solar PV system’s durability, maximising its potential to deliver clean, renewable energy for years to come.

1. Factors Influencing the Lifespan and Performance of Solar PV Systems

A solar PV system’s long-term performance is influenced by various interrelated factors. By understanding these factors, you can make informed decisions to ensure the vitality and efficiency of your solar PV system:

a. Quality of Components: Investing in high-quality solar panels, inverters, and mounting systems is instrumental in extending the lifespan and maintaining the performance of your solar PV system. Superior components often come with more extended warranties and higher efficiency rates, ensuring a reliable and robust solar system.

b. Installation Practices: A professional and meticulous installation process is vital for optimising your solar PV system’s performance. Proper mounting, angling, and wiring, all contribute to the efficiency and durability of your solar power system. A well-installed solar system minimises the risk of component failures, system degradation, and premature ageing.

c. Environmental Conditions: Weather conditions, such as temperature fluctuations, snowfall, and natural disasters, can impact the performance and lifespan of a solar PV system. To mitigate these risks, it is crucial to account for local environmental conditions when designing and installing a solar PV system.

2. Preventative Maintenance and Periodic Inspections

Proactive maintenance and regular inspections play a vital role in preserving the long-term performance of your solar PV system:

a. Cleaning Solar Panels: Regular solar panel cleaning is essential to maintain their efficiency. Panels should be cleaned at least once a year, as dirt, dust, and debris can prevent sunlight from reaching the solar cells, reducing energy output.

b. Inspecting Mounting Structures: Periodic inspection and maintenance of mounting structures are critical for ensuring the stability and integrity of your solar panels. Loose components, corrosion, or wear and tear should be detected and addressed promptly to avoid potential damage to the system.

c. Inverter and Wiring Maintenance: Regularly inspecting and maintaining the inverter and wiring will help you avoid component failures and detect issues early on. Regular component checks will ensure optimal performance of your solar PV system.

3. Monitoring System Performance

Continuous monitoring of your solar PV system’s performance will help you detect and address inefficiencies, preserving the system’s long-term functionality:

a. Monitoring Equipment: Installing monitoring equipment, such as performance trackers and data loggers, will provide you with insights into your solar PV system’s operation. These tools allow you to track energy output, identify underperforming components, and detect potential issues before they escalate.

b. Benchmarking Energy Output: Regularly benchmarking your solar PV system’s energy output against its expected performance can help you identify efficiency losses and address them in a timely manner, ensuring optimal performance throughout your system’s lifespan.

4. Upgrading and Optimising Your Solar PV System

Strategically upgrading components and optimising configurations can contribute to extending the lifespan and maintaining the long-term performance of your solar PV system:

a. Replacing Outdated Components: Over time, some components in your solar PV system may become obsolete or less efficient. Replacing outdated components with newer, more advanced alternatives can improve system performance and maintain efficiency.

b. Optimising Configurations: As your energy consumption patterns change, adjusting your solar PV system’s configuration may be required to maximise efficiency and cater to your evolving energy needs. Configuring your system based on your current energy usage will help you capitalise on the system’s full potential.

Conclusion

Extending the lifespan and maintaining the long-term performance of your solar PV system is an essential aspect of maximising the financial and environmental benefits of renewable energy. By understanding the factors that influence system performance, establishing proactive maintenance practices, and continuously monitoring efficiency, you can ensure that your solar PV system delivers clean, reliable energy for years to come.

Ceiba Renewables is committed to providing expert guidance, design, consultancy, project management, and installation services to help you make the most of your solar PV system. Partner with Ceiba Renewables, solar energy specialists, and unlock the enduring potential of solar PV, ensuring your renewable energy investment remains a powerful force for change in the UK’s energy landscape.

Ceiba Renewables Proud to Become Tesla Energy Certified Installer

by | Jun 7, 2016

TE Certified InstallerCeiba Renewables are proud to announce that we have become a Tesla Energy Certified Installer. Tesla are renowned for their high performance electric vehicles from which they have adapted their battery technology in the form of the Tesla Powerwall.

We’re delighted to become a Tesla Energy Certified Installer after a lengthy selection process and we can now offer the Powerwall to customers who are keen to utilise this battery storage technology to enhance their solar PV savings and minimise their reliance on the grid.

Combined with Solaredge inverter technology we can adapt the Powerwall to all situations, including retrofitting to existing PV systems.

We are currently carrying out surveys and taking orders for the Tesla Powerwall now and hope to begin installing at the end of June, start of July. If you’re keen to take advantage of this revolution in battery storage get in touch and we’ll be delighted to help.