EO Mini Pro 3 vs Simpson & Partners Home 7: size or warranty?

The smallest charger against the longest warranty

These two don't compete on features so much as on priorities. The EO Mini Pro 3 is £550 and the size of an A5 notebook — 215 × 140 × 100 mm, smaller than anything else with a serious spec sheet. The Simpson & Partners Home 7 is £649, larger, heavier, and carries a ten-year enclosure warranty that nothing else on the UK market matches.

The £99 gap is not the real question. The real question is which single fact about your installation matters more: the wall it has to fit on, or the decade it has to survive.

• EO Mini Pro 3 — the charger for constrained walls and British Gas customers.
• Simpson & Partners Home 7 — British-made, ten-year enclosure cover, three-phase-ready if you need it.

When size is the deciding factor

There is a specific reader for the EO Mini Pro 3: one standing in front of a narrow bit of render between a downpipe and a window, or a recessed porch, or the only dry patch of wall in a shared alley. At 215 × 140 × 100 mm, it fits places the 350 × 200 × 110 mm Simpson won't. If an installer has already told you the wall is tight, the decision is over before it started.

If the wall is fine, the EO's size stops being a reason and starts being a preference. And at that point a £550 charger with a three-year warranty, 7.2kW rather than 7.4kW, and a basic solar diversion is asking to be compared against cheaper options — the Easee One at £405, the Ohme ePod at £409, or the Tesla Wall Connector at £478 — rather than a more expensive one.

The British Gas clause

One exception rewrites the EO's economics entirely. If you're a British Gas customer on the EV Power+ tariff, the Hive Power+ version of the EO credits back 25% of your charging costs. No other charger in this catalogue offers anything comparable. Over a year of meaningful mileage, that cashback is worth more than the £99 gap to the Simpson several times over. If you're on British Gas and intending to stay, the EO is the only answer here.

If you're not, the clause is noise.

What the extra £99 actually buys

The Simpson's ten-year enclosure warranty is the headline, and it is unusual — most of this market sits at three years, a few stretch to five (the Rolec EVO at £449 is the nearest comparable). Note the wording: ten years on the enclosure, three on the internals. It's still the longest structural commitment you'll get at this price.

The rest of the premium is quieter. UK manufacturing. Anodised aluminium rather than moulded plastic. Finish options including Accoya wood and Cotswolds Green, which read as silly until you remember the charger is going on the front of your house. A 22kW three-phase variant for the small minority of homes with that supply. Tethered or untethered. It's a considered piece of kit at a fair price — the same case made by the Andersen A3, for £346 more.

The caveats are real. The installer network is smaller than EO's, so confirm a local fitter is comfortable with it before ordering. The app is functional rather than polished; anyone wanting genuine tariff automation should be looking at the Ohme Home Pro at £535 or reading the Ohme vs Simpson comparison instead. Both of these chargers are scheduling tools, not half-hourly optimisers — fine on Octopus Go or EDF GoElectric, out of their depth on Octopus Agile.

The verdict

Buy the EO Mini Pro 3 if:

• Your installer has flagged the wall as tight
• You're a British Gas customer taking the Hive Power+ 25% cashback
• You want Ethernet as a wired fallback in a signal-poor spot

Buy the Simpson & Partners Home 7 if:

• The charger will be visible from the street
• A ten-year enclosure warranty matters to you
• You have three-phase supply and want the 22kW option

For most readers on most walls, the Simpson is the better charger. UK-built, longer cover, three-phase-capable, and the finish options mean it looks like something you chose rather than something an installer left behind. The EO earns its place only when the wall or the tariff forces the question. If neither does, put the Simpson on the wall.