How much does battery storage cost for a warehouse?

Industrial battery storage for warehouses typically costs £300–£500 per kWh of usable capacity. A 250kWh system (suitable for a 50,000 sq ft warehouse) costs £75,000–£125,000 installed. After Full Expensing tax relief (100% first-year deduction), the effective net cost at 25% Corporation Tax is around £56,000–£94,000.

What size battery do I need for my warehouse?

Battery sizing depends on your daily energy profile, peak demand charges, and whether you are pairing with solar. A rule of thumb: size the battery to store 2–4 hours of your average daytime load. A warehouse consuming 5,000 kWh/day needs approximately 200–400kWh of battery capacity. We size each system based on your actual half-hourly meter data.

How long do industrial batteries last?

Modern lithium iron phosphate (LFP) batteries used in commercial warehouse systems are warranted for 10–15 years at 80% capacity retention. With moderate daily cycling (once per day), many systems perform for 20+ years. Tesla Megapack, CATL, and BYD commercial systems all offer 10-year performance warranties.

Battery Energy Storage

Battery Storage for UK Warehouses

Industrial battery storage turns a good solar investment into a great one. Eliminate peak demand charges, lift solar self-consumption above 90%, and earn grid services revenue — all from the same system.

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£300–500/kWh

Installed Cost

3–6 years

Typical Payback

90%+

Solar Self-Consumption

10–15 yrs

Battery Warranty

Six Revenue Streams

How Warehouse Battery Storage Pays Back

Unlike solar alone, battery storage creates multiple overlapping income and saving streams that compound over time.

Peak Demand Shaving

Eliminate expensive demand charges by discharging battery during peak hours. For warehouses on half-hourly metering, this alone can save £15,000–£60,000/year.

Save £15k–£60k/yr

Solar Self-Consumption

Store surplus midday solar generation and discharge in the evening, lifting self-consumption from 60% to 90%+ and maximising your solar return.

Up to 90% self-use

Time-of-Use Arbitrage

Charge from the grid at cheap overnight rates (2–5p/kWh on Agile Octopus) and discharge during peak prices (30–50p/kWh), generating a positive return independent of solar.

25–45p/kWh spread

Backup Power

Keep critical loads running during grid outages. Cold stores, server rooms, and security systems can be protected with automatic islanding capability.

Business continuity

Grid Services Revenue

Enrol in demand flexibility markets (Dynamic Containment, FFR) to earn £20,000–£50,000/year in additional grid services revenue on top of energy savings.

£20k–£50k/yr extra

Cold Store Optimisation

Pre-cool refrigerated units during cheap tariff periods and coast through peak hours, reducing refrigeration energy costs by 25–35%.

25–35% fridge saving

Sizing Guide

Battery Storage Costs by Warehouse Size

Indicative costs and savings. Actual figures depend on your tariff structure, consumption profile, and whether solar is included.

Warehouse Size	Battery Capacity	Installed Cost	Peak Demand Savings	Payback Period
10,000–25,000 sq ft	50–100kWh	£20k–£50k	£5k–£15k/yr	4–6 years
25,000–50,000 sq ft	100–250kWh	£45k–£125k	£15k–£40k/yr	3–5 years
50,000–100,000 sq ft	250–500kWh	£100k–£250k	£30k–£80k/yr	3–4 years
100,000+ sq ft	500kWh–2MWh	£200k–£800k	£60k–£200k/yr	3–4 years

Costs exclude VAT. Solar pairing improves payback by 12–24 months in most cases.

Technologies

Battery Technologies We Install

We specify the most appropriate battery technology for your application — not a one-size-fits-all product.

Tesla Megapack / Powerpack

Chemistry: NMC Lithium-ion

Warranty: 10 years

Best for: Grid services, large-scale arbitrage

BYD Battery-Box Premium

Chemistry: LFP Lithium Iron Phosphate

Warranty: 10 years

Best for: Solar coupling, safe indoor install

CATL EnerOne

Chemistry: LFP

Warranty: 15 years

Best for: Long-cycle daily use, cold stores

Fluence Gridstack

Chemistry: NMC

Warranty: 10 years

Best for: Grid services revenue stacking

SolarEdge Home Battery (scaled)

Chemistry: LFP

Warranty: 10 years

Best for: Solar self-consumption, mid-size units

Battery Storage FAQs

Do I need solar panels to use battery storage?

No. Battery storage works independently of solar. You can charge from the grid at low-rate periods and discharge at peak times. However, pairing battery storage with solar dramatically improves returns by maximising self-consumption and enabling export optimisation.

Can I get funding for warehouse battery storage?

Yes. Battery storage qualifies for the same tax incentives as solar: 100% Full Expensing (or AIA up to £1 million), delivering effective tax relief at 25% Corporation Tax. Some Local Enterprise Partnerships and Growth Hubs offer grant funding of £20,000–£100,000 for combined solar and storage projects.

How long does battery storage installation take?

A 100–500kWh system typically takes 2–4 weeks from contract to commissioning. This includes DNO notification (G99 for systems above 50kW), civils and cable installation, battery rack commissioning, and energy management system configuration. Sites with complex electrical infrastructure may take longer.

What is demand shaving and how does it save money?

Demand charges are fees that energy suppliers add to bills based on the highest 30-minute average consumption recorded in a billing period. For warehouses on half-hourly metering, this demand charge can represent 20–40% of the total electricity bill. Battery storage discharges during demand peaks, flattening consumption and reducing the peak recorded, which directly reduces demand charges.

Are industrial batteries safe to install in a warehouse?

Modern lithium iron phosphate (LFP) batteries are significantly safer than older lithium-ion chemistries. They do not contain cobalt, are thermally stable, and are far less prone to thermal runaway. UK installations follow BS EN IEC 62619 safety standards. Batteries can be installed indoors with appropriate ventilation or in outdoor containerised units.

Learn More About Warehouse Energy Storage

Battery Storage Guide for Cold Stores Warehouse Solar Costs & ROI Guide Solar Finance Options for Warehouses Warehouse Solar: Full Expensing Tax Relief Solar PPA vs Lease vs Purchase

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