Ohme Home Pro vs Cord Zero: tariff brain or signal insurance?

The £20 question

Twenty pounds separates these two, which means price isn't the argument. The Ohme Home Pro is £535. The Cord Zero is £555. At that distance, you're not choosing on cost — you're choosing on philosophy.

The shortest version:

• Ohme Home Pro — the tariff whisperer. Direct API links to Octopus, OVO and British Gas; the charger negotiates with your supplier while you sleep.
• Cord Zero — the resilient pragmatist. Dual Wi-Fi and 4G, a full safety suite on board, and a promotional five-year warranty that undercuts Ohme's three.

What the Ohme does that the Cord doesn't

Integration depth. The Ohme Home Pro is officially recommended by Octopus for Intelligent Go, which means it doesn't just follow a schedule — it talks to Octopus's backend and chases the dispatched cheap slots as they're issued. Pair it with Intelligent Go's 7p/kWh rate and you stop thinking about when to charge. The car plugs in; the rest happens.

The Cord Zero supports the same tariffs, but through schedule-based integration rather than live API handshakes. On a fixed-window tariff like Octopus Go or EDF GoElectric, that distinction doesn't matter — both chargers hit the 12:30am window and do the job. On Intelligent Go, the Ohme's tighter link makes it the cleaner choice.

Solar also favours the Ohme. It has built-in diverting, no extra CT clamp to buy. The Cord supports solar but only in a basic sense — if surplus-only charging is the reason you're reading this, the Zappi GLO is the charger you actually want, and the Ohme vs Zappi GLO comparison is the page to read next.

What the Cord does that the Ohme doesn't

Stay connected. The Cord Zero carries both Wi-Fi and a multi-network 4G SIM with automatic failover. If your router reboots, if the charger sits in a detached garage with one signal bar, if your broadband provider has a bad Tuesday — the Cord keeps talking. The Ohme Home Pro has a 4G SIM too, but it's a fallback rather than a true dual-path setup.

Then there's what Cord ships inside the unit: built-in RCD Type A, PEN fault detection, SPD, and overvoltage protection. Most installers price these separately when they're not on board. Expect £150–£250 off the labour quote, which comfortably erases the £20 premium and then some. It's the sort of detail that doesn't appear on a spec sheet headline but shows up on the invoice.

The promotional five-year warranty extension is the other sweetener. Standard on both is three years. If Cord's promotion is still running when you buy, the Cord Zero has two years more cover than the Ohme — a real gap, not a rounding error. Worth checking at the point of purchase; promotions end.

Where each one falls down

The Ohme's weak spots are mechanical. Five-metre cable as standard; the eight-metre version costs extra. Three-year warranty where the Rolec EVO and Simpson & Partners Home 7 offer five and ten respectively as standard. And on a flat-rate tariff — if you're not on a smart tariff and don't plan to be — the Ohme's integration cleverness is wasted money. The Tesla Wall Connector at £478 does manual scheduling just as well.

The Cord's weak spot is software. The Cord AI app is functional; it's not a rival to Ohme's or Tesla's. If you're the sort of person who checks charger apps daily, who wants per-session cost breakdowns and tidy graphs, the Ohme feels a generation ahead. Cord is building; Ohme has already built.

Which to buy

Buy the Ohme Home Pro if:

• You're on Octopus Intelligent Go or plan to switch
• You want solar diverting without paying extra for a CT clamp
• App polish and detailed session tracking matter to you

Buy the Cord Zero if:

• Your Wi-Fi is unreliable or the charger sits far from the router
• You want the install quote trimmed by the bundled safety components
• The promotional five-year warranty is still running when you order

On a wall of our own, on a smart tariff, the Ohme Home Pro goes up. The Intelligent Go integration is the single best feature in this price bracket, and the £20 saving is real. But if the house has patchy broadband, or the installer quote is making eyes water, the Cord Zero is the more sensible purchase — quieter, more connected, and currently better warrantied. Both earn their place; the question is which problem you're actually trying to solve.