Ohme Home Pro vs Simpson & Partners Home 7

The £110 between automation and aluminium

These two chargers want different things from you. The Ohme Home Pro at £539 is a tariff-chasing machine — small, light, obsessively connected. The Simpson & Partners Home 7 at £649 is a piece of British-made hardware designed to sit on the front of your house for a decade without embarrassing itself. The £110 gap between them buys quite different things depending on what you value.

• Ohme Home Pro — the smarter charger. Direct API links to Octopus and British Gas; it chases cheap half-hours so you don't have to. £539.
• Simpson & Partners Home 7 — the longer-lasting shell. Anodised aluminium, premium finishes, a 10-year enclosure warranty, and a 22kW three-phase option. £649.

Why the Ohme's tariff integration is worth the price difference — and then some

The Ohme Home Pro connects directly to Octopus Intelligent Go via API. It doesn't just schedule charging for a fixed window — it negotiates slot-by-slot with the grid, pulling power at 8p/kWh across a six-hour overnight spread. On Octopus Agile, where rates shift every thirty minutes, the Ohme follows each price movement automatically. You set a target charge level and a departure time; the charger does the arithmetic.

The Simpson & Partners Home 7 supports Intelligent Octopus Go too — the schedule comes through to the charger — but on simpler tariffs like Octopus Go or EDF GoElectric, it falls back to a basic timer. That works. But on Agile, a timer is a blunt instrument. The Ohme's built-in 4G SIM (included for three years) also means it stays connected even if your garage Wi-Fi is patchy — the Simpson & Partners relies on Wi-Fi alone.

If you're on a flat-rate tariff and have no plans to switch, neither charger's smart features matter much. In that scenario, the Ohme's advantage dissolves and the question becomes purely about hardware — which leads to the Simpson & Partners' strongest argument.

What the Simpson & Partners' £110 premium actually buys

Build quality, mostly. The enclosure is anodised aluminium, UK-manufactured, offered in finishes like Accoya wood and Cotswolds Green. It weighs 5.5 kg to the Ohme's 3.5 kg — the difference is material, not padding. The 10-year enclosure warranty is the longest on the UK market. That said, the internal electronics carry only a three-year warranty, identical to the Ohme's. So if a relay or circuit board fails in year five, you're covered for the box it sits in but not the thing that charges your car. Worth understanding before the headline figure does too much work.

The Simpson & Partners also offers a 22kW three-phase option — rare at £649. If your property has three-phase supply, this is one of the more affordable routes to faster home charging. The Ohme is single-phase only, capped at 7.4kW.

There's also the question of aesthetics. If the charger sits on a visible wall — a front drive, a period property — the Simpson & Partners' finishes compete with the Andersen A3 at £900. For buyers weighing design against price, the Andersen A3 vs Simpson & Partners comparison is the more useful page.

The app and installer gap

The Ohme app is polished: per-session cost tracking, colour display on the unit itself, detailed energy monitoring. The Simpson & Partners app works — scheduling, energy data, the basics — but it's less refined. For a charger you interact with daily through your phone, that gap matters more than it might sound.

Installer availability is the other consideration. Ohme is one of the most widely fitted chargers in the UK; finding a local OZEV-approved installer is straightforward. Simpson & Partners has a smaller network. The product is good, but confirming a competent local fitter before ordering is not optional — it's the single biggest practical risk with this charger.

Which to buy

Buy the Ohme Home Pro if:

• You're on, or moving to, a smart tariff — especially Intelligent Go or Agile
• You want the most capable app and energy tracking in this price range
• Your garage or driveway has weak Wi-Fi and the built-in 4G matters

Buy the Simpson & Partners Home 7 if:

• The charger sits on a visible wall and you want premium finishes without paying £900 for an Andersen
• You have three-phase supply and want 22kW home charging
• A decade-long enclosure warranty on UK-made aluminium appeals more than tariff automation

For the majority of Tesla owners on single-phase supply with a smart tariff, the Ohme Home Pro is the right charger. It costs £110 less, it's smarter where it counts, and the savings it generates on variable rates will outstrip that price gap within a year. The Simpson & Partners is a handsome piece of hardware with a genuine longevity story — but the longevity that saves you money is in the software, not the shell.