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Home Battery Storage · Hertfordshire & Essex

Home battery storage, installed by the electrician who surveys it.

Not a call centre. Not a subcontractor you'll never see again. Jamie and Dan — two qualified electricians — design, survey and install every job themselves, start to finish. And because it's not a company selling your details on, the numbers are honest too: typically £300–£700 over the next 12 months (£25–£60 a month), using real local rates — not a generic estimate.

See What This Could Save You ↓Call 01992 276149

No obligation · 2hr response · MCS-certified installers

Not a call centreJamie or Dan handles your survey — both qualified electricians, not a sales team
Same team, every stepThe electricians who survey your home are the ones who install it — no subcontractors
£300–£700 /12 months£25–£60 a month, depending on usage — real local rates
See Your Real Numbers

What could this actually save you?

Pick a usage level to see real local rates, real hardware, no form to fill in first.

1 · What's your usage like? — works without solar

It's your usage and battery size that set the number, not the type of house — these three are just quick examples to start from.

£5,500Estimated cost
0% VAT — battery storage is VAT-free until 31 Mar 2027
£309Savings, next 12 months
£26/moMonthly saving

Recommended: 1 battery · 10.36 kWh usable, based on your bill.

We don't quote a payback period — nobody can honestly promise what energy prices do next. These are real savings figures, not a prediction of the future.

These are estimates using live local rates and real hardware — your usage and JJB's confirmed install price will move the exact number slightly. Octopus Go's standing charge (~54p/day) isn't included above and may differ from what you pay now.

Book a Free Survey →
How That Number Works

A typical day, on a Time-of-Use tariff

The battery does one thing, automatically, every 24 hours — buy electricity when it's cheap, use it when it would otherwise cost the most.

00:30 – 05:30
Night Rate

Battery charges from the grid at around 9.5p/kWh on Octopus Go — averaged from live rates checked across JJB Volta's coverage area.

Rate checked August 2026. Octopus Go rates vary by region and move with each Ofgem price cap review — always confirm the live rate for your postcode before quoting a customer.

05:30 – 00:30
Day Rate

Home runs on stored battery power instead of buying at around 33p/kWh — one flat rate for all 19 hours outside the night window, not the sunniest one.

Rate checked August 2026 — reconfirm before use in new materials.

This cycle runs on tariff rates, not sunshine — the same charge and saving in a grey December as a bright June. No generation to wait for, nothing weather can take away.

Already Comparing Installers?

There are two ways to buy a battery system.

What you'll find most places

A national company takes your details online, then sells or routes the job to a local subcontractor you've never met and can't check — you're often not even sure who's actually turning up.

JJB Volta

Jamie and Dan design your system, survey your home, and do the install themselves — the same two qualified electricians, on every single job, accountable to you directly. Not a call centre, not a lead sold on.

Why JJB Volta

Electricians first. That's why the install is done properly.

We're not a solar-only outfit bolting a battery on as an afterthought — battery systems and the electrical work behind them are our trade.

Fixed Price

Fixed Price Promise

We survey, we quote, you agree — that's what you pay. No extras on the invoice, no scope creep.

Accredited

MCS & NAPIT Certified

Fully accredited installers, with all grid and certification paperwork handled for you.

Local

Genuinely Local

You speak to Jamie or Dan directly — not a call centre, and not a sales team.

Guarantee

6-Year Workmanship Guarantee

Every installation is NAPIT-registered, on top of the manufacturer's own warranty.

Track Record

3,400+ Customers Since 2016

150+ verified five-star Google reviews and a 5.0 rating on Which? Trusted Trader.

Insured

£5m Public Liability Cover

Fully insured, DBS-checked engineers, on every single job we take on.

Thinking About Solar Too?

Three real-shaped examples, not a calculator.

Solar savings depend on your roof's orientation, pitch and shading — things a slider can't know. These three examples are anchored to real JJB Volta installs, not a generic UK-yield assumption.

Smaller Home
6 panels (≈2.8kWp) + 1 battery
Est. installed cost
£10,600
Est. saving, next 12 months
£736/yr
Typical Example
Family Home
10 panels (≈4.8kWp) + 2 batteries
Est. installed cost
£15,800
Est. saving, next 12 months
£1,097/yr
Larger Home
16 panels (≈7.6kWp) + 3 batteries
Est. installed cost
£22,100
Est. saving, next 12 months
£1,842/yr

Illustrative examples, anchored to real JJB Volta installation and quoting experience in 2026 — not a generic calculator assumption. Real figures depend on your roof, orientation and usage, and are confirmed at survey.

Beyond The Number

This isn't just about the fastest possible payback.

A battery gives you more control over how and when you buy electricity — not a guaranteed high-return investment, and we won't sell it as one.

Lower bills, from day one

The saving above isn't a projection — it's built from real local rates, checked live. What it doesn't include is what happens to prices after today, because nobody can honestly promise that.

Less exposed to price rises

Most of what you'd otherwise buy at the day rate gets replaced with electricity bought at the fixed overnight rate instead. We can't guarantee the gap between rates stays where it is today.

Two things worth knowing we're deliberately not claiming here: whether this battery keeps your power on during a cut depends on whether backup/EPS capability is specified — we'll confirm that with you at survey, not assume it. And we're not putting a carbon-saving figure on this page — shifting when you draw grid power doesn't reliably cut emissions unless the overnight generation mix is genuinely cleaner, and that's not something we can verify and stand behind here. If reducing your own footprint or having power independence matters to you as much as the bill, tell us — it changes how we'd size and specify your system, and we'd rather have that conversation honestly than guess.
What We Get Called Out For

A growing share of our work is fixing someone else's battery or EV charger install.

Not because the equipment was faulty — because it was never properly commissioned. A battery that's never been set to the right tariff schedule. An EV charger drawing from the expensive daytime rate instead of the cheap overnight window. Technically installed. Not technically doing its job. We won't name who did the original work — that's not the point. The point is that "installed" and "installed properly" aren't the same thing.

~50%of recent EV charger call-outs are fixing another company's install
2016Jamie and Dan qualified and working as electricians in Hertfordshire since
100%of surveys and installs done personally — never subcontracted
£5mpublic liability cover, DBS-checked, NAPIT registered
The Equipment

Cheap components are the most expensive mistake you can make

We specify the same Fox ESS battery hardware used in our combined solar installations — the equipment our own engineers would install in their own homes. No panels, no roof work, no scaffolding.

Fox ESS EP11-H — Battery Storage
Usable capacity10.36kWh
ChemistryLi-ion, self-heating
SafetyBuilt-in advanced fire suppression
Battery warranty10 years
Workmanship guarantee6 years, NAPIT registered
MonitoringLive app included
Typical install time1 day
Questions & Concerns

Things people actually ask us

Real concerns from real survey conversations, answered honestly.

Typically £25–£60 a month, depending on your usage and how much of it happens outside the cheap overnight window. We'll give you a real figure at survey, based on your actual bill — not a generic estimate.
MCS CertifiedNAPIT RegisteredWhich? Trusted TraderRECC MemberDBS Checked★★★★★ 5.0/5.0 · 150+ verified reviews
Where We Work

Covering Hertfordshire & Essex

Based in Cheshunt, JJB Volta covers Broxbourne, Hoddesdon, Hertford, Ware, Bishops Stortford, Harlow, Letchworth, Stevenage, Welwyn Garden City, Hatfield and St Albans across Hertfordshire, and Epping, Chelmsford, Braintree, Saffron Walden, Brentwood and Billericay across Essex — plus Enfield and the northern fringes of Greater London. If your area isn't listed, just call — the chances are we cover you.

Your bills won't go down by themselves.

Book a free, no-obligation assessment. We'll tell you honestly whether a battery — with or without solar — stacks up for your home. No pressure, no hard sell.

Book a Free Survey →

Call us direct 01992 276149