Indra Smart PRO vs Cord Zero

The £78 between two install-cost cutters

Both the Indra Smart PRO and the Cord Zero arrive with surge protection devices already in the box — a detail that saves most buyers £100–£150 on installation labour before the charger even powers up. They share the same 7.4 kW single-phase output, the same 3-year standard warranty, and roughly the same physical footprint on your wall. The Indra costs £395. The Cord costs £473. The question is whether that £78 buys you anything you will actually use.

• Indra Smart PRO — £395, includes SPD and a CT clamp for solar. The lowest effective cost to get a smart charger on the wall.
• Cord Zero — £473, includes SPD and adds built-in 4G with automatic Wi-Fi failover. The charger for garages where broadband doesn't reach.

Connectivity: where the Cord earns — or wastes — its premium

A smart charger that loses its internet connection is a dumb charger with a nicer app. The Indra Smart PRO connects over Wi-Fi and Bluetooth. Fine if your router is within range of the driveway. Useless if it isn't — and plenty of detached garages, side-return walls, and outbuildings sit in a Wi-Fi dead zone.

The Cord Zero carries a built-in multi-network 4G SIM alongside its Wi-Fi radio. If the Wi-Fi drops, the 4G takes over without intervention. For scheduled off-peak charging on a tariff like Octopus Go or EDF GoElectric, that failover means your car still charges at 6.99–8.5 p/kWh rather than defaulting to peak rate because the connection died at 2 a.m. If your charger location has strong Wi-Fi, this insurance policy is worth nothing. If it doesn't, it is worth considerably more than £78.

Install savings and the Indra's solar edge

Both chargers cut installation costs by bundling an SPD — typically £100–£150 off the electrician's bill. The Indra goes further: it includes a CT clamp for solar diversion at no extra charge, a component that usually adds £50–£100 to a solar-compatible install. For a household with panels already on the roof, the Indra's effective cost to get charging from surplus generation is remarkably low. The Cord Zero supports solar too, but its implementation is more basic, and there is no CT clamp in the box. Buyers serious about solar surplus should also look at the myenergi Zappi GLO, whose Eco+ mode is purpose-built for that job — the Zappi GLO vs Indra Smart PRO comparison covers that angle in detail.

For grant-eligible buyers — renters and flat owners — both chargers are OZEV-approved. The £500 grant covers the Indra's £395 unit price outright and contributes towards installation. On the Cord Zero, it covers most of the £473 and still leaves a useful dent in the install bill.

App and tariff support compared

Neither app will win design awards. The Indra app is functional but basic; the Cord AI app is similarly workmanlike. Both trail the Ohme Home Pro and Tesla Wall Connector for polish and responsiveness. If app quality matters to you — and it does matter, because you will open it most mornings — the Ohme Home Pro vs Cord Zero comparison is worth a look.

On tariff integration, the Indra covers Octopus Intelligent Go, Octopus Go, OVO Charge Anytime, and EDF GoElectric. The Cord matches those and adds British Gas EV Power to the list. Neither charger does half-hourly price-chasing on Octopus Agile in the way the Ohme Home Pro does — both rely on schedule-based windows rather than dynamic slot optimisation.

One note on warranty: the Cord Zero currently ships with a promotional upgrade from 3 years to 5 years. That is a meaningful difference if it is still running when you order. Check before you buy — promotional terms end without notice.

The verdict

Buy the Indra Smart PRO if:

• Your Wi-Fi comfortably reaches the charger location
• You have solar panels and want the CT clamp included at no extra cost
• You want the lowest total cost — unit plus install — for a fully smart charger

Buy the Cord Zero if:

• Your charger will sit in a Wi-Fi dead zone and you need 4G failover
• You are on British Gas EV Power and want native tariff support
• The 5-year promotional warranty is still available when you order

For most buyers with decent broadband, the Indra Smart PRO at £395 is the stronger recommendation. It does the same core job for £78 less and throws in a solar CT clamp. The Cord Zero's 4G modem is a genuine problem-solver — but only if you have the problem. If your garage is three walls and a garden from the router, the Cord is the one to buy. Otherwise, pocket the difference.