Wallbox Pulsar Max vs Cord Zero

£40 and a mobile signal

The Wallbox Pulsar Max and the Cord Zero sit close on price — £513 against £473 — and deliver the same 7.4kW on a single-phase supply. Both are OZEV-approved. Both tether a Type 2 cable. The gap between them is not about charging speed. It is about what happens when your Wi-Fi wobbles, how much your electrician charges, and whether your wall has room for a dinner plate.

• Wallbox Pulsar Max — the smallest proper home charger on the market, with a 22kW three-phase option for the few homes wired for it. £513.
• Cord Zero — the charger that keeps talking when your broadband dies. Built-in 4G, built-in safety hardware, £473.

Connectivity is not a luxury feature

A smart charger that loses its connection is a dumb charger with a nicer app icon. The Pulsar Max relies on Wi-Fi and Bluetooth. If your consumer unit is in the hall and the charger is bolted to a detached garage wall twelve metres away, you may find the myWallbox app shrugging at you more often than you'd like.

The Cord Zero carries a built-in multi-network 4G SIM with automatic failover. Broadband drops at midnight — the charger switches to mobile data and your Octopus Go schedule runs regardless. For homes with patchy Wi-Fi reach to the driveway, this is the single most important difference between the two. The Pulsar Max has no 4G option at all.

The install cost the spec sheet hides

The Cord Zero bundles an RCD, PEN fault detection, SPD, and overvoltage protection inside the unit. The Pulsar Max does not. That means your installer typically needs to add those components at the consumer unit when fitting a Wallbox — and that labour and parts usually adds £150–£250 to the bill. On a like-for-like install, the Cord Zero's £40 unit saving can balloon into a £190–£290 total saving. It is the kind of number that only appears on the invoice, never on the product page.

When the Pulsar Max earns its keep

Two scenarios favour the Wallbox. First: tight spaces. At 198mm × 201mm × 99mm, the Pulsar Max is barely larger than a hardback book. The Cord Zero measures 320mm × 210mm × 132mm — still modest, but noticeably bigger. If the charger has to squeeze between a gas meter and a downpipe, size wins.

Second: three-phase supply. The Pulsar Max can deliver 22kW on three-phase wiring. The Cord Zero is single-phase only, capped at 7.4kW. Fewer than 5% of UK homes have three-phase, but if yours does — perhaps a barn conversion or a new-build with a heat pump — the Wallbox is one of the cheapest routes to 22kW charging. The alternatives at that power level, like the Zappi GLO at £599 or the Zaptec Go 2 at £638, cost considerably more.

Tariff support and the app question

The Cord Zero lists broader tariff integration: Octopus Go, Intelligent Go, OVO Charge Anytime, British Gas EV Power, and EDF GoElectric all get schedule-based support. The Pulsar Max supports Intelligent Octopus Go but leaves every other tariff as a manual schedule you set yourself.

Neither charger chases half-hourly pricing on Octopus Agile. If that matters, the Ohme Home Pro at £539 remains the benchmark — and the Ohme vs Cord Zero comparison covers that trade-off in detail.

On app polish, the Cord AI app is functional but plain. The myWallbox app is a step ahead in design, though neither matches the Ohme or Tesla apps for refinement. Voice control via Alexa and Google is a Wallbox extra — minor for most, but there if you want it.

Warranty and weather

The Pulsar Max ships with a five-year warranty. The Cord Zero's standard cover is three years, though a promotional extension to five years is currently bundled free. If that promotion is still running when you order, the two are level. If it has ended, the Wallbox holds a two-year advantage — meaningful for a box that lives outdoors.

Both carry IP54 weather ratings. Neither is the toughest in the catalogue for fully exposed walls; the Hypervolt Home 3 Pro at IP66 is the one to consider if your charger faces the prevailing rain with nothing overhead.

Which to buy

Buy the Wallbox Pulsar Max if:

• Your wall space is tight and every centimetre counts
• Your home has three-phase supply and you want 22kW charging
• You value a guaranteed five-year warranty over a promotional one

Buy the Cord Zero if:

• Your Wi-Fi does not reliably reach the charger location
• You want the lowest total installed cost — unit plus labour
• You use a tariff beyond Intelligent Go and want schedule integration out of the box

For a standard single-phase home with average broadband, the Cord Zero is the more sensible buy. It costs £40 less up front, potentially £200-plus less installed, and its 4G fallback solves a problem the Pulsar Max cannot even attempt. The Wallbox is a fine charger with a specific brief — small footprint, three-phase readiness — but that brief applies to a narrow slice of buyers. Most people should take the Cord.