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Industry Insights

Answering your FAQs on battery energy storage installation

Our battery energy storage systems (BESS) are a unique solution to the net zero target and energy crisis, but as a new technology, we receive many questions about the installation process. We’re here to answer them.


We recently published a piece with our Power Project Engineer, Darren Cheadle, for his insights into the installation timeline, but we also asked him to answer some of the most frequently asked questions we receive.

Darren joined our team in 2021 and is responsible for overseeing the installation process of our BESS, with his years of experience in the power sector, and is passionate about Connected Energy’s products and our delivery.

He says: “It’s exciting to use my many years of experience in the power grid sector to such a unique role in terms of working with all arms of the business to successfully bring our product physically to life and hand it over to clients.

“All of the Connected Energy team work in very diverse roles, but we’re all pulling towards the same goal, it’s a fantastic place to work and be able to bring sector-relevant knowledge to benefit our clients.”

With that expertise in mind, let’s dive into our customers’ FAQs – and remember if you have a question, don’t hesitate to reach out and we can put Darren or another of our team in touch to support you with your BESS journey.

What space is required for an installation?


Our systems come in a 20ft shipping container so enough space is required on site to accommodate a system of that size. We also need to leave approximately a 1.5m gap around the system for ventilation and to ensure a safe footprint for any manual maintenance requirements. The weight of the system depends on which system you choose, our 300kW/360kWh unit is approx. 13.4 tonnes. We will assess to ensure any needs for a support structure are met accordingly. The physical requirements can be discussed with any prospective clients depending on your site requirements.


What electrical requirements are needed?

Electrical Requirements - Power Side

Voltage (V): 400VAC (3P)
Current (A): 520A (630A Isolator)
Power (kW): 360kW
Frequency: 50Hz

Electrical Requirements - Ancillaries Side

Voltage (V): 230VAC (1P+N)
Current (A): 63A (63A MCCB)
Frequency: 50Hz

How is it transported and moved into place?

The system needs to be transported to the site via HGV and crane and requires a flat level surface for a safe installation. We will also need access on the day from the entrance point to the area where it will be installed.

What preparation is needed on site before delivery?

The location for the system and access for the crane and lorry needs to be clear of obstructions, parked vehicles and pedestrians kept at a safe distance.  The ground should be prepared, and civils construction completed.

Who needs to be present on the day?

On the day of delivery, it is best to have a customer representative on site.

We find most of our customers are so excited to see the system being delivered that we often get a welcoming party with phones and cameras at the ready!

How long does delivery take from order to installation?

This is dependent on a range of factors. As a general guideline, we can usually deliver in around 6 – 8 weeks however several things need to happen before we can commission a system.

The key component that can cause delays is liaison with the DNO (Distribution Network Operator). Any site is required to comply with G99 regulations – this is to ensure that if the grid goes down the generator doesn’t try to feed into the network connector, as this is a safety requirement. This assessment and approval process can take some time – depending on the DNO – and is out of both our and your control – so we advise arranging this as early as possible to minimise delays to the installation date. We will ensure the scope for this is agreed between all parties – any necessary contractors, as well as the customer and the DNO.

Can you offer a full-package solution?

Absolutely. During our discussions, we will factor in any on-site or external partners you may have, and can work with these to install the system, or we can offer a full package solution including electrical installation.

What happens in an emergency?

We have in-built safety monitoring and controls, as well as separate door access to the system away from the batteries. The system will perform automatic shutdown procedures if safety parameters are breached for any reason, and it has its own audible alarm. In addition, our controls team monitors the system remotely and they are alerted to any issues or unauthorised entry to the system. We can also link to external beacons, your security, or fire panel if required.

We have two emergency stop buttons fitted as standard, one inside the power electronics area, and one external button near the main incoming supply.

We use AI in our system which initiates an early warning system if any anomaly is flagged. The BESS also comes with smoke alarms. We have had no incidents throughout the lifespan of any of our BESS systems. Safety and security are our top priorities with every installation, and we provide more details on this to any prospective clients.

Let's connect!

Do you have questions about the installation of our BESS and how our feasibility studies and site surveys are undertaken? We can arrange an informal discussion of your needs and queries if you contact our team below.