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Renewable energy guides and comparisons

Straight answers from the team who design and fit these systems: solar and batteries, EV charging, air conditioning, boilers and commercial solar. What each option is good at, what it costs to run, and how to choose, without the sales talk.

Latest articles

A Sigenergy SigenStor battery installed outside a house, next to a timber wall
Solar & Battery

Sigenergy vs Fox ESS: which home battery suits you?

Our top pick against one of the UK's best-known battery brands: backup, EV charging, adding to existing solar, warranty and the kind of home each one suits.

Published · 5 min readRead

An EcoFlow PowerOcean battery and inverter on the outside wall of a modern home with solar panels
Solar & Battery

Best solar battery UK 2026: every battery we fit, ranked

Every battery we install, ranked by the people who fit them: what each does best, where each is weaker, and the kind of home it suits.

Published · 7 min readRead

A modern house with solar panels, a wall-mounted inverter and battery stack in the carport, and an electric car charging
Solar & Battery

Is Fox ESS any good? Fox battery questions answered

Straight answers on Fox ESS batteries: where they're made, EP11 vs EP12, backup in a power cut, Octopus, retrofits, warranty and cold garages.

Published · 6 min readRead

A detached house with a full row of black solar panels on its grey tiled roof
Solar & Battery

AC vs DC coupled batteries: which is right for adding a battery to existing solar?

What AC and DC coupling mean, why AC coupling is often the simplest way to add a battery to existing panels, and when a hybrid inverter makes more sense.

Published · 5 min readRead

A Sigenergy SigenStor battery installed outside a house, next to a timber wall
Solar & Battery

Is Sigenergy any good? Your SigenStor questions answered

The questions people ask most about Sigenergy SigenStor, from where it's made and Octopus to warranty, EV charging and whether it's worth the extra.

Published · 6 min readRead

Black solar panels on the roof of a red-brick house under a blue sky
Solar & Battery

Upgrading your battery? Why the Canadian Solar EP Cube is worth a look

If your battery is too small, out of warranty or no longer supported, here's why Canadian Solar's EP Cube is worth a look, what the upgrade involves, and who it doesn't suit.

Published · 5 min readRead

A Sigenergy SigenStor battery installed outside a house, next to a timber wall
Solar & Battery

Sigenergy vs EcoFlow: which home battery is right for you?

The two batteries we recommend most, side by side: capacity, warranty, backup, EV charging and app, and the kind of home each one suits.

Published · 5 min readRead

An EcoFlow PowerOcean inverter and stacked battery fitted on the outside wall of a modern home with solar panels
Solar & Battery

EcoFlow PowerOcean: your home battery questions answered

The questions we're asked most about EcoFlow's OCEAN 2 battery: which model you need, 5 or 8 kWh packs, power-cut backup, Octopus, warranty and existing solar.

Published · 7 min readRead

Two Anker SOLIX X1 battery stacks in an open garage beside an electric car, under a solar roof
Solar & Battery

Anker SOLIX X1: your home battery questions answered

Everything people ask about Anker's slim SOLIX X1: depth, capacity, cold weather, backup, warranty and Octopus, plus how it compares with Sigenergy and Fox ESS.

Published · 7 min readRead

Black solar panels on the roof of a stone house in green countryside
Solar & Battery

LONGi vs AIKO: which solar panels are better?

The two back-contact panels we fit, compared on their datasheets: efficiency, size, shade, looks and warranty, and which one suits your roof.

Published · 5 min readRead

Black solar panels on a house roof under a grey, cloudy sky
Solar & Battery

Solar panel myths, and the questions we're asked most

Winter, cloud, north-facing roofs, planning permission, power cuts and selling your home: straight answers to the questions we hear most, checked against official UK sources.

Published · 7 min readRead

Useful pages

Which battery brand?Every battery we fit, and who each suitsAdd a battery to existing solarRetrofits and upgradesBest tariffs for solarExport and import ratesHow we design your systemOpenSolar 3D design, done remotelyWhat to expectEvery step of an installationFAQsAnswers by service

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Video From Recent Installs

Real installs, in the customer’s own words

Filmed by our team on recent jobs. You see the actual array on the actual roof, the inverter and battery on the wall, and the system that was specified for that property.

No stock footage and no actors, just what went in, why they chose Eco2u, and what it is doing for their bills, from the people living with it every day.

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  • 17 × 465W panels
  • Hanchu 5kW inverter
  • 9.2 kWh battery

“I wanted to support the production of clean energy and save money.”

  • South-facing roof
  • Fox 5kW inverter
  • Fox EP12 · 12 kWh

“We've got a south-facing roof, so I've decided to put solar on the roof.”

  • 12 × 530W panels
  • Sigenergy 6kW inverter
  • SigenStor · 10 kWh

Why we like it: A great system because you can stack on more batteries as and when required.