Solar battery

Understanding Solar Panel Batteries Price in Today’s Market

In the current climate, solar panels and batteries are becoming a popular solution for homeowners to save money on rising energy bills. But what exactly is a home battery, why is it important and do you really need one with your solar panel installation? Keep reading as we answer all your burning questions.

Storage of solar energy

Solar battery pricing

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  • A clear idea on the pricing of solar battery
  • Industry leading performance guarantees
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    ✓ A 10kWh solar battery system can produce 30kWh per day.

    ✓ A home battery helps you store the energy you generate for later use.

    ✓ You can get a positive ROI within just a few years with a home battery system.

    Bird's eye view

    Breaking Down Solar Panel Batteries Cost

    The cost of solar panel batteries can vary based on several factors, including the type of solar batteries, battery capacity and installation expenses.

    Understanding the Cost of Batteries for Solar Panels

    Various economic factors can affect the cost of batteries for solar panels. Fluctuating prices of raw materials like lithium, cobal and nickel in lithium-ion solar batteries affect the overall cost of production. Market trends, such as disruptions in the supply chain, like during the COVID-19 pandemic, can lead to fluctuating solar battery prices, while continuous upgrades in technology tend to drive prices down over time.

    Visit our comprehensive guide on solar panel batteries for more detailed information.

    The Role of Solar Panel Manufacturers in Pricing

    The overall cost of a solar battery is tied to the manufacturer’s production costs, profit margins and pricing strategies. Leading manufacturers like Tesla or Enphase can leverage economies of scale to optimise production costs and offer competitive pricing. Profit margins affect the final price, with higher margins often associated with advanced technologies and brand recognition. Manufacturers’ pricing strategies are influenced by market competition, demand and the perceived value of their products. For example, Enphase positions itself as a premium brand with higher pricing, while companies like BYD may focus on affordability to capture a broader market.

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    The Financials: How Much Do Solar Batteries Cost?

    The average cost of solar batteries can vary based on solar battery types and capacities. Lithium-ion batteries are the more popular modern choice. The cost varies according to battery capacities, with larger-capacity batteries generally costing less per kWh.

    So what about the average pricing for different Solar Battery Capacities? The solar battery cost (without installation) varies depending on the solar battery capacity:

    Small (5 kWh) | £3,500 – £5,000
    Medium (10 kWh) | £5,000 – £7,500
    Large (20 kWh) | £10,000 – £12,500

    Types of Solar Batteries and Their Prices

    The two most common types of solar batteries include lithium-ion and lead-acid. They have different characteristics that affect their price, lifespan and overall value for money.

    Lithium-Ion vs. Lead-Acid: Price Comparison

    Lithium-ion batteries’ advanced technologies and materials cost more to manufacture than traditional solar battery types. However, advances in technology and economies of scale have been gradually reducing these costs. Of the two solar battery types, lithium-ion has a longer lifespan with lower replacement costs and little maintenance. Lead-acid batteries are cheaper to manufacture, but the limited cycle life may require more frequent replacements. Regular checks, topping up water and managing the charging and discharging processes are necessary to ensure optimal performance and can contribute to additional costs.

    While the initial cost of lithium-ion batteries may be higher, the potential for a longer life and lower maintenance expenses can make them a cost-effective choice over the system’s lifetime. What’s more, the price for lithium is expected to continue to decline in 2024, and with it the price of batteries. This will make solar batteries much more affordable for the consumer market.

    Cost Breakdown of Lithium-Ion and Lead-Acid Solar Batteries
    We take a closer look at the cost breakdown of a solar battery:

    Calculating the Cost for a Solar Battery System

    To calculate the overall cost for a solar battery system, you need to consider the cost of the solar batteries along with installation charges. Here’s a quick guide:

    • Determine Energy Needs: Assess your daily energy consumption to understand the capacity you need, so you can choose an appropriately sized battery.
    • Select Battery Type: Decide between lithium-ion and lead-acid batteries and how many you need based on your budget, space availability and performance requirements.
    • Estimate Costs: Obtain quotes for the battery and installation. Determine the cost per kWh of storage capacity to estimate the total expense, while considering equipment quality, warranties and after-sales support.
    • Look for Incentives: Check for available government incentives, rebates or tax credits that can offset the cost.
    • Account for Additional Components: Include the cost of solar panels (if relevant), inverters, charge controllers, wiring and any additional components required for the system.
    • Budget for Maintenance: Account for potential maintenance costs over the system’s lifespan, especially for lead-acid batteries that require more upkeep.

    Use this calculator to get a better estimation of your solar battery system costs.

    Understanding the Solar Battery Bank

    A solar battery bank acts as a reservoir to store surplus energy generated by solar panels. Comprising interconnected batteries, an inverter and a charge controller, the battery bank allows you to harness solar energy during periods of sunlight and use it even when the sun isn’t shining.

    Explore our selection of solar battery banks and find the right fit for your system.

    Factors Influencing Solar Battery Storage Prices

    The cost factors of solar storage include:

    • Brand: Reputable brands often come with a higher price tag. Investing in a well-known brand can provide assurance of quality and performance.
    • Capacity: A larger capacity solar battery storage system can store more energy but tends to be more expensive upfront, but more affordable per kWh.
    • Type and Technology: Lithium-ion batteries are known for their higher efficiency and longer lifespan, but come with a higher initial cost compared to lead-acid.
    • Number of Batteries: The more solar batteries you need, the higher your initial upfront cost.
    • Installation Costs: The complexity of the installation process, including wiring, integration with solar panels and other components can affect overall costs.

    Long-Term Costs of Solar Battery Ownership

    Modern solar battery storage systems, generally lithium ion, have low maintenance requirements. You’ll need to check the battery routinely, update firmware and ensure proper ventilation. While rare, potential repair costs can occur due to component failures or battery degradation over time. Manufacturers typically offer warranties covering defects, degradation and overall performance. Longer warranties extending beyond a decade (like the one offered at Soly) show the manufacturer’s confidence in the durability of the product. Solar battery storage with longer warranties and after-sales support may have slightly higher upfront costs but can provide added peace of mind.

    Understanding Solar Battery Warranties

    Investing in a solar system is a big investment, so choosing products and installers with good warranties is very important. A robust warranty can instill confidence in the product’s durability and performance. Solar batteries typically come with a product warranty, but if you’re installing a battery as part of a larger solar system, you may be offered two main warranties:

    Product Warranties

    Product warranties cover the battery for a time period during which they will repair or replace the battery at no extra cost. Most battery warranties in the UK last for 10 years. Soly offers an industry-leading 15 year warranty, using the most advanced technology from Enphase.

    Performance Guarantees

    If you install a battery as part of a larger solar system, performance guarantees provide assurance for a specified period, such as 10 to 25 years. This ensures that the system maintains a certain level of efficiency throughout the warranty period. If the panels fall below this, the manufacturer will repair or replace the underperforming panels. Soly offers an industry-leading 25-year performance guarantee and a 10-year workmanship warranty on installation.

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      Solar Battery Installation: Additional Costs to Consider

      There are additional costs to consider with solar battery installation, including labour, permits and potential upgrades to your home energy system.

      Additional Equipment and Upgrades for Installation

      The costs associated with additional equipment for a home energy system, particularly when integrating batteries, can vary based on the size of the system and the type and capacity of the batteries. Here’s an overview:

      • Inverters: Inverters convert direct current (DC) from the batteries into alternating current (AC) used by household appliances. They can range from a few hundred to a thousand pounds, depending on their capacity, efficiency and features.
      • Battery Management Systems (BMS): BMS manages and protects the batteries by monitoring voltage, current and temperature. They can cost a couple hundred of pounds, depending on the complexity and features of the system.
      • Safety Gear: Safety gear includes components such as battery enclosures, fire suppression systems and other safety features to protect against potential hazards.
      • Wiring and Installation: Installers ensure the wiring and installation are suitable for the battery system and is compliant. Installation costs vary widely based on system size, location and labour rates.

      Discover the benefits of solar panels and a battery.

      Understanding Home Energy System Upgrades

      When integrating solar batteries into an existing home energy system, you may need to make several upgrades to ensure optimal performance. You may need to install a compatible inverter that’s capable of managing solar power and home energy storage. Depending on the existing electrical panel’s capacity, you may need to upgrade the panel to accommodate the increased load.

      Additionally, if your current solar panel array is unable to meet the increased energy demand or isn’t compatible with the batteries, you may need to expand or upgrade your panels. The costs associated with these upgrades can vary significantly, from hundreds to thousands of pounds. To get an accurate idea of costs, consult our Soly renewable energy experts for a personalised quote.

      Solar Power Battery Capacity and Price Correlation

      The cost of a battery depends on the battery type, capacity and other factors. Generally speaking, the higher the capacity of the solar power battery (the more energy a solar battery can store), the more you can expect to pay. In the UK, a 10kWh solar battery system could cost £4,000 to £22,000 or more, depending on whether you’re paying for the battery alone or the a full solar system which includes the installation and other components. We recommend getting quotes from reputable solar energy providers to get a more accurate estimate based on your specific requirements.


      Case Study: 10kW Solar Battery Investment

      Let’s say you decide to invest in a 10kWh solar battery system to reduce electricity bills and increase energy independence. The initial investment includes solar panels, a 10kWh battery, an inverter and installation which costs you £20,000. A well-designed 10kWh solar system could generate an average of 30 kWh per day.

      Assuming a conservative estimate of 70% self-consumption, you could save £800 per year on electricity. The payback period is around 25 years. Over the 25-year lifespan of the system, you could save £20,000 to £25,000 on electricity bills. The ROI, in this case, would be 100% to 125%.

      This is without taking into account any government incentives, tax credits or electricity price hikes that could reduce the payback period and improve ROI. While the initial investment for a 10kWh solar battery system is substantial, the long-term financial benefits make it a great investment.

      Detailed infographic of a 10kWh solar battery investment cost-benefit analysis

      Detailed Look at 10kW Solar Battery Investment

      Here are some of the financial benefits and potential return on investment of a 10kWh solar battery system:

      • Electricity Savings: A 10kWh solar battery system can generate 30 kWh of electricity per day, saving you money on electricity bills.
      • Export Payments: You can feed excess energy produced by the solar panels back into the grid for an additional income stream.
      • Grid Time-of-Use Savings: A solar battery system allows you to use stored energy during peak (more expensive periods) for additional savings.
      • Payback Period: The payback period represents the time it takes for the savings to equal the initial investment. Depending on the upfront investment, you can expect a payback period as early as 8 years.
      • Incentives and Rebates: Government incentives, tax credits and rebates can reduce the upfront costs of the system.

      Is Investing in Home Solar Battery Storage Worth It?

      Yes, it’s worth having solar panels with a battery. When you consider the convenience of being able to store your own energy and make money for feeding back to the grid, it’s an easy choice. The realistic side is that adding solar panels with battery storage costs a bit more, but a home solar battery has the potential to double your savings. Having solar panels alone are great, but you you’re not able to use the energy you generate at night or when the sun isn’t shining.

      Balanced scale image comparing costs and benefits of home solar battery storage

      Comparing Solar Batteries Cost with Long-Term Savings

      The initial cost of home solar and a battery, including panels, inverters and installation can be a significant investment. However, this upfront expense is offset by substantial long-term savings on electricity bills. Solar batteries allow you to harness and store solar energy, reducing reliance on the grid during peak hours and cloudy days. Over time, these stored reserves provide consistent energy, resulting in lower monthly expenses. You can also make money by feeding excess energy back to the grid, making solar panels and battery storage a financially viable choice over the system’s lifespan.

      Graph showing long-term savings versus initial solar battery costs

      Maximising Savings: Solar Batteries as a Long-Term Investment

      Here are some tips to optimise your solar battery usage for maximum savings:

      • Peak Shaving: Program your solar battery system to discharge during peak electricity rate hours, reducing your reliance on the grid when rates are highest.
      • Load Shifting: Schedule energy-intensive tasks, such as running appliances or charging electric vehicles when solar production is at its peak. This load shifting strategy helps maximise the use of your stored energy and minimises reliance on grid power during peak periods.
      • Smart Energy Management Systems: Use smart energy management systems that optimise the charging and discharging cycles of your solar battery based on real-time energy consumption patterns, weather forecasts and rates.
      • Regular Maintenance and Monitoring: Keep your solar panels clean to ensure optimal energy production. Regularly monitor your system’s performance and address any issues promptly.
      • Government Incentives, Tax Credits, and Rebates: Take advantage of rebates and net metering programs to save and make money.

      Learn about the sustainable benefits of a solar battery on our tips and tricks page.

      Understanding Government Incentives for Solar Batteries

      Here are some government incentives available for solar battery investments that can reduce the overall cost and improve the return on investment:

      • The Energy Company Obligation Scheme (ECO4): The ECO4 is available for low-income households and can either cover the cost of the install or pay you for surplus energy you generate.
      • Smart Export Guarantee (SEG): SEG pays homeowners for any excess energy fed back to the grid.
      • Home Upgrade Grant: This provides grants up to £10,000 to low-income households using green measures, such as solar panels.
      • 0% VAT Incentive: Until 2027, homeowners will pay 0% VAT on energy-saving products such as solar panels.


      Map highlighting different government incentives across regions


      Where to Buy Solar Battery: Finding the Best Deals

      When deciding where to buy a solar battery, it’s essential to choose reputable suppliers to ensure the reliability and quality of your investment. Soly UK, endorsed by Shell UK, is a world leader in renewable energy with industry-leading warranties and guarantees. To find the best deals, compare quotes and take advantage of discounts, promotions and government incentives to reduce costs. Ensure that the supplier provides comprehensive warranties and reliable aftercare support to guarantee the long-term performance of your solar battery system.

      Icon set representing different places to purchase solar batteries

      Visit Soly UK to explore a wide range of solar battery options and find the best deals. With a strong reputation, Soly provides high-quality solar panels and batteries with industry-leading product and performance guarantees. Want an instant quote? Use our configurator tool, or set up a virtual consultation with our renewable energy experts for free, no-obligation recommendations for your home.