As businesses increasingly focus on sustainability and energy efficiency, solar power is becoming a key solution. Many industries are adopting solar PV systems to cut energy costs and reduce environmental impact. However, solar energy can be further optimised with the addition of solar battery storage technology, which enables businesses to store excess energy for use during non-peak times.
At SESC Solutions, we bring over 30 years of combined experience in providing renewable energy solutions. We’ve seen first-hand how solar battery storage can revolutionise business energy strategies. In this guide, we’ll explore everything you need to know about commercial solar storage batteries and how they can complement your solar PV system.
What is Battery Storage Technology?
Solar PV systems generate power during daylight hours, but not all the energy produced is immediately used. Instead of exporting surplus energy at low SEG (Smart Export Guarantee) rates, a battery storage system allows you to store this excess energy for use later, when energy production is lower or unavailable, such as at night.
Similar to rechargeable batteries used in everyday devices, solar storage batteries allow businesses to draw on stored power when solar generation drops, providing energy independence and savings.
Types of Solar Battery Systems
There are several types of commercial solar storage systems available, each with its own advantages:
DC-Coupled Storage Systems
DC-coupled storage connects directly between the solar panels and the inverter, charging the battery during the day when surplus energy is produced. However, careful planning is essential to ensure the compatibility of the PV inverter and battery systems, especially with systems like SolarEdge StorEdge, which must be matched with specific battery models like LG Chem.
While DC-coupled systems offer efficient energy transfer, oversized batteries can degrade during winter months when energy production is lower, leading to reduced efficiency. Ensuring the correct battery size and load calculation is vital for long-term performance.
AC-Coupled Storage Systems
AC-coupled storage systems, though using a DC battery, are located on the AC side of the property. These systems convert AC to DC for storage, allowing greater flexibility in installation, as they are not restricted by the location of the solar inverter. While they experience minor energy conversion losses (around 5-7%), the ease of installation and operational flexibility makes them a popular choice for many commercial setups.
Hybrid Inverters
Hybrid inverters combine the benefits of both DC and AC systems, providing a cost-effective, flexible solution. They allow businesses to charge batteries from both solar energy and the grid. Hybrid systems are particularly advantageous for new installations, offering an all-in-one solution. However, existing solar systems may find it more challenging to retrofit a hybrid inverter without replacing the current setup.
Advantages of Commercial Solar Battery Storage
There are several key benefits of integrating a battery storage system with your solar PV panels:
- Energy Independence: By storing excess energy, you reduce reliance on the National Grid, particularly during peak demand times. This independence also ensures a more reliable energy supply, protecting your business from potential power outages.
- Cost Savings: By using stored energy during peak times, when electricity prices are highest, you can significantly reduce your energy bills. Additionally, some systems allow businesses to sell excess energy back to the grid at premium rates, such as Octopus Energy’s current rate of 40p per kWh.
- Environmental Impact: Battery storage maximises your use of renewable energy, reducing your reliance on fossil fuels and decreasing your carbon footprint. This not only benefits the environment but also enhances your business’s reputation as an eco-friendly organisation.
- Enhanced Efficiency: A battery storage system ensures that no solar energy goes to waste. By storing excess energy, you can optimise the efficiency of your entire solar PV system.
Key Considerations for Solar Battery Storage
While solar battery storage offers numerous advantages, there are important factors to consider:
- Initial Costs: Installing a solar battery system will increase the upfront cost of your solar installation, so you’ll need to weigh this against the potential long-term savings.
- Maintenance: Regular maintenance is crucial to keep your battery system operating efficiently. Professional servicing will help prevent issues and ensure longevity.
- Space Requirements: Solar battery storage units can take up considerable space. It’s important to plan for a dedicated, accessible area for installation and future maintenance.
Is Commercial Solar Battery Storage Right for Your Business?
To determine whether battery storage is the right choice for your business, consider the following:
- Cost vs. Benefits: Evaluate the cost of the system in relation to potential energy savings and additional income from selling surplus energy.
- Energy Usage Patterns: Assess your energy consumption during peak and off-peak times to ensure a battery system will meet your needs.
- Research Available Options: Explore different solar battery storage systems, their capabilities, and how they align with your energy requirements.
Speak to the Experts
At SESC Solutions, we specialise in commercial solar panel systems and have worked with businesses across various sectors, including manufacturing, agriculture, healthcare, and more.
Our team stays up to date with industry standards and regulations, and we’re equipped to advise on the best solar battery storage solutions for your business.
Whether you're installing a new solar PV system or considering an upgrade with battery storage, our experts are here to help.
Call us on 01747 445 509 or fill out our online enquiry form to request a callback.
