Ohme Home Pro vs CTEK Chargestorm Connected 3

£547 and a phase apart

The Ohme Home Pro costs £539. The CTEK Chargestorm Connected 3 costs £1,086. That is a £547 gap — wider than the price of many complete chargers on the market. And the gulf in what they do is just as wide.

• Ohme Home Pro — £539, single-phase, tethered, built to chase cheap half-hours on smart tariffs automatically. The charger most Tesla owners on Octopus Intelligent Go should buy.
• CTEK Chargestorm Connected 3 — £1,086, three-phase native, untethered, built-in MID meter and Type B RCD, OCPP 2.0.1. A commercial-grade unit dressed for a driveway.

These two are not competitors. They solve different problems. The question is which problem is yours.

Why the CTEK costs twice as much — and whether that matters to you

The Chargestorm Connected 3 is engineered for three-phase supply at 22kW. It carries a MID-approved energy meter, Eichrecht compliance, built-in MRCD Type B protection (saving £100–£200 on a separate Type B RCD in the consumer unit), and OCPP 2.0.1 with ISO 15118 plug-and-charge. It weighs up to 24 kg. It is, bluntly, a car-park charger that happens to be OZEV-approved for domestic installation.

If you have a three-phase supply — or are having one installed as part of a renovation — the CTEK delivers 22kW to a Tesla Model 3 or Model Y's 11kW on-board charger (capped by the car, not the box), and a full 22kW to vehicles with a 22kW AC intake. That is a genuine capability the Ohme cannot match; the Ohme is single-phase only, full stop.

But fewer than 5% of UK homes have three-phase power. If yours does not, the CTEK runs at ~7.4kW — identical to the Ohme — and you have spent £547 extra for hardware you cannot exploit. Install costs compound the difference: £900–£1,300 typical for the CTEK versus £400–£500 for the Ohme. All-in, a single-phase household could pay north of £1,800 more for no additional charging speed.

Smart-tariff control is not close

This is where the comparison tilts decisively. The Ohme Home Pro has direct API integration with Octopus and British Gas. On Intelligent Go, it is the officially recommended charger — it requests cheap 8p/kWh slots throughout the night, automatically, without you setting a timer. On Octopus Agile, it follows half-hourly pricing in real time. On British Gas EV Power, it schedules into the 00:00–05:00 window natively.

The CTEK has none of this. No Octopus integration, no OVO integration, no first-party scheduling app at all. You manage it through a third-party OCPP platform — Monta is the most common — which can set timers but cannot replicate Intelligent Go's dynamic slot allocation. On a flat-rate tariff, this barely matters. On a smart tariff, it is the difference between saving money automatically and not saving it at all.

The Ohme also includes a 4G SIM for three years, useful if the charger sits at the far end of a drive beyond Wi-Fi range. The CTEK offers 4G as an optional add-on.

The CTEK's genuine case: three-phase, metering, and longevity

Dismiss the CTEK entirely and you miss its audience. A homeowner with three-phase supply, perhaps running a small business from home and needing MID-certified energy records for expenses or recharging visiting colleagues' cars via RFID, has a short list. The CTEK sits on it alongside the Zaptec Go 2 — and the CTEK's built-in Type B RCD and MID meter save buying them separately.

Its 5-year warranty is two years longer than the Ohme's three. Its IK10 impact rating means it tolerates a stray wheelie bin or a child's football. And OCPP 2.0.1 future-proofs it for back-end platforms that haven't launched yet.

For the right buyer, £1,086 is defensible. That buyer has three phases and an OCPP mindset. If you are reading this page because you own a Tesla and a single-phase house, the CTEK is not the right buyer's charger.

The verdict

Buy the Ohme Home Pro if:

• You have single-phase supply — which is almost every UK home
• You are on, or switching to, Intelligent Go, Agile, or British Gas EV Power
• You want the charger to handle tariff optimisation without a third-party platform

Buy the CTEK Chargestorm Connected 3 if:

• You have three-phase power and want 22kW hardware
• You need MID-approved metering or RFID access control at home
• You are comfortable managing scheduling through Monta or a similar OCPP back-end

For the vast majority of Tesla owners on a standard UK supply, the Ohme Home Pro at £539 is the better charger — cheaper to buy, cheaper to install, and meaningfully smarter on any tariff that rewards flexibility. The CTEK is a fine piece of engineering aimed at a narrow set of homes. Know which set yours is in, and the decision makes itself.