Maximizing Savings with AC Coupled ESS and Flexible Energy Tariffs

Maximizing Savings with AC Coupled ESS and Flexible Energy Tariffs


In an era of sustainable energy, discover how integrating an AC Coupled Energy Storage System (ESS) with flexible energy tariffs can slash your bills. Explore the potential for substantial savings as you leverage cost-effective, off-peak rates like Octopus Go. By filling your ESS during the night at just 7.5p per kWh, compared to the typical 27p per kWh, you can strategically use this stored energy throughout the day, reducing your energy expenses while embracing clean, renewable sources. Unlock the power of innovation and cost-efficiency in this informative blog post.

An illustration detailing the AC Coupled ESS process from purchase of ESS to Storage

Understanding AC Coupled ESS:

AC Coupled Energy Storage Systems, or ESS, are a vital component of a modern and sustainable energy management strategy. These systems consist of batteries that store excess electricity generated from renewable sources or during periods of lower electricity demand, such as nighttime. An AC Coupled ESS stores electrical energy in the form of alternating current (AC), making it compatible with the electrical grid in your home.


Flexible Energy Tariffs: The Key to Savings:

To unlock the full potential of your AC Coupled ESS and maximize your energy savings, you need to embrace flexible energy tariffs, like the Octopus Go tariff. These tariffs offer discounted electricity rates during off-peak hours, typically during the night, when the demand for electricity is lower. Octopus Go, for example, provides electricity at a rate of just 7.5p per kWh, which is substantially lower than the typical daytime rate of around 27p per kWh.


The Strategy: How It Works

The strategy to reduce your energy bills considerably involves using your AC Coupled ESS to store electricity during off-peak hours when the rates are low and then dispensing this stored energy throughout the day when you need it. Here's how it works:


Charging during Off-Peak Hours:

During the night, when energy demand is minimal, your AC Coupled ESS takes advantage of the lower tariff rates to charge itself.

It can fill up to 100% of your daily energy usage with energy at the reduced price, thanks to its storage capacity.


Smart Discharge Throughout the Day:

Throughout the day, your ESS releases the stored energy to power your home's appliances and devices.

This process ensures that you are using the cheapest energy first, resulting in significant cost savings.


Peak Energy Cost Reduction:

By using your stored energy during peak hours, you avoid drawing energy from the grid when electricity prices are high.

This is particularly advantageous when managing the energy needs of your home during evenings or when appliances like air conditioning and heating are in use.An illustration showing some forms of green energy in action

Promoting Load Shifting for a Greener Future:

By adopting the strategy of load shifting through AC Coupled ESS and flexible energy tariffs, you're not only saving on your energy bills but also actively contributing to a more sustainable and environmentally responsible energy ecosystem. Load shifting refers to the practice of moving energy consumption away from peak demand times to off-peak hours, and it's a key factor in the equation of reducing energy demand and embracing cleaner, renewable energy sources.

Here's how load shifting plays a pivotal role in this equation:


Reducing Peak Demand Pressure:

Peak demand hours put significant stress on the electrical grid, often leading to the utilization of non-renewable energy sources like fossil fuels to meet the heightened demand. By shifting your energy consumption to off-peak hours, you're effectively reducing the strain on the grid during these crucial times.


Optimizing Renewable Energy Utilization:

Many renewable energy sources, such as wind and solar power, produce electricity intermittently, depending on weather conditions. Load shifting allows us to make the most of renewable energy by consuming more power during times when it is readily available. This ensures that clean energy sources play a more substantial role in meeting our daily energy needs.


National Energy Demand Reduction:

Imagine if everyone in the UK adopted load shifting strategies. The cumulative effect would be a significant reduction in total energy demand across the country. In fact, it's estimated that by embracing load shifting, the UK could reduce its total energy demand by as much as 10%. This not only lessens our reliance on non-renewable energy but also lowers greenhouse gas emissions, contributing to a cleaner and more sustainable future.



Embracing load shifting practices along with AC Coupled ESS and flexible energy tariffs is not only a smart financial move but also a conscientious choice to reduce peak energy demand, promote the use of renewable resources, and contribute to a greener and more energy-efficient future for the UK and beyond. It's a win-win strategy that benefits both your wallet and the planet. To get a free quote please contact us here


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