Battery Storage as a Service

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Do you have:

  • an import connection sized at 1000kVA plus;
  • a minimum base load of 500kW and / or potential for an export connection;
  • a long-term (10-15 year) intention to utilise your premises (and maintain current load) and a satisfactory credit history?

If the answer is yes, you could reduce your electricity bill by installing battery storage, funded by an investment fund. The investment fund will discharge the battery to reduce your electricity use in peak times. It will also use the battery to earn income from the National Grid for providing grid balancing services.

How it works

We install a 1MW+ sized battery (energy storage system) at your premises, for a period of 10-15 years. The installation and maintenance costs of the battery are fully funded by our investment partner.

The installation is covered by a service agreement between the investor and yourself (assumed to be the site owner, or the electricity bill payer if the site is on a long lease).

You receive one or more of these benefits:

  • use of the battery for peak charge avoidance (TRIAD charges, DUOS charges - download our fact sheet for more information);
  • where required, a UPS backup for essential supplies, e.g. emergency lighting.

The investor receives:

  • income from the National Grid for providing ancillary services such as Firm Frequency Regulation (FFR);
  • some share of on-site benefits provided by the battery, or a rental for the battery.

Case study

An industrial premises has a 1,200kVa supply with a base load of 500kW.

After successfully applying for an export connection, a 1MW / 1MWh battery system is installed, housed in a 40ft container on site. The battery is used for peak charge avoidance to reduce the site owner's electricity bill, and to provide services to the grid to generate income for the investor. There is a small UPS requirement for 100kW for one hour, requiring reserve capacity of 100kWh at all times. This is expected to save an hour of lost downtime (costing the company £2,000 per hour) three times per year. 

The estimated annual savings, income and running costs are as follows:

  Site owner cash flow Investor cash flow
Purchase of battery upfront   -£550,000
Income / Savings / Running Costs / Rental
Grid income - £110,000
TRIAD avoidance





DUoS avoidance





Backup downtime avoidance £6,000 -

Running costs

  • kWh cost of FFR
  • maintenance






Rental for battery - -
Total £37,340 £120,860

Of course, if the site owner prefers, they can fund the system in full and receive the grid income themselves. However, tendering for National Grid contracts is a specialist area and the grid income is by no means guaranteed. Funded storage allows the site owner to focus on what they do best at very little risk, while reducing their electricity bill.

For more information

If you would like more information, please call us on 0118 951 4490, or email

You may also be interested in our funded storage fact sheet:

Download our free

Funded Battery Storage Fact Sheet

funded energy storage system

Download now

Download our Funded Battery Storage Factsheet:

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