Cord Zero vs Rolec EVO

The £117 between a budget charger and a budget charger with 4G

Two British-made smart chargers, both under £500, both packing built-in safety hardware that trims install costs. The Cord Zero costs £473. The Rolec EVO costs £356. That £117 gap is almost entirely explained by one component: the Cord's built-in multi-network 4G SIM.

• Cord Zero — £473, tethered, 3-year warranty (currently promoted to 5), dual Wi-Fi + 4G connectivity. The charger for garages that Wi-Fi forgot.
• Rolec EVO — £356, untethered, 5-year warranty as standard, Eco+ solar diversion with CT clamp included. The charger for everyone else.

Does 4G justify the Cord Zero's premium?

If your charger sits on an exterior wall within decent range of your router, the honest answer is no. The Rolec EVO offers Wi-Fi 6, Bluetooth 5.0, and an Ethernet port — three paths to stay connected, any one of which is sufficient for schedule-based smart charging on tariffs like Octopus Go or EDF GoElectric.

The Cord Zero's 4G becomes load-bearing in a specific scenario: a detached garage or outbuilding where Wi-Fi coverage is patchy and running an Ethernet cable is impractical. In that case, the automatic failover from Wi-Fi to cellular means scheduled charging and tariff integration keep working regardless. That is a genuine problem-solver — but it is a problem most driveways do not have.

For the majority of semi-detached and terraced homes where the charger mounts within a wall's thickness of the router, the Rolec EVO's connectivity is more than adequate — and it saves you £117.

Solar diversion and the Rolec's quiet advantage

This is where the Rolec EVO does something the Cord Zero does not match. Its Eco and Eco+ modes divert surplus solar to the car, and the CT clamp ships in the box rather than as an extra. The Cord Zero lists solar compatibility, but its implementation is basic schedule-based integration rather than true surplus-only diversion.

If you have panels — or plan to install them — the Rolec EVO is the stronger choice at this price. It will not match the myenergi Zappi GLO for granularity, but at £356 versus £599, it does not need to. For buyers weighing the Rolec's solar modes against the Zappi's, the Rolec EVO vs Zappi GLO comparison covers that ground in detail.

Warranty, build, and what you are actually paying for

The Rolec EVO's five-year warranty is standard — printed on the box, not contingent on a promotion. The Cord Zero's standard term is three years. A promotional upgrade to five years is running at the time of writing, but promotions end. If you are comparing like with like, the Rolec's cover is more dependable.

Both chargers include built-in RCD, PEN fault detection, and surge protection, which means both should save you £150–£250 on install labour by eliminating the need for separate protective devices in the consumer unit. The Rolec edges ahead on physical toughness: its IK10 impact rating is the highest available, versus the Cord's IK08. On an exposed wall beside a driveway, that difference is worth something.

One practical distinction: the Rolec EVO is untethered only. You plug in your own Type 2 cable each session. The Cord Zero is tethered as standard (with an untethered variant at £473). If you want a cable permanently attached and ready to grab, the Cord delivers that; the Rolec does not.

The grant arithmetic

Both chargers are OZEV-approved. Eligible renters and flat owners can claim the £500 grant. For the Rolec EVO at £356, the grant covers the unit outright and chips into the install. For the Cord Zero at £473, the grant covers the unit and leaves a modest surplus toward installation costs. Either way, grant-eligible buyers are looking at install labour as essentially their only outlay — a strong position for two chargers that already reduce that labour bill with built-in protection.

Which to buy

Buy the Cord Zero if:

• Your charger location has unreliable Wi-Fi and no Ethernet option
• You prefer a tethered cable permanently attached to the unit
• The promotional five-year warranty is still running when you order

Buy the Rolec EVO if:

• You have solar panels or plan to add them
• You want the longest warranty without relying on a promotion
• You would rather save £117 and put it toward installation

For most UK homes — router within range, no solar ambitions beyond the ordinary — the Rolec EVO at £356 is the more considered buy. It is £117 cheaper, carries a longer standard warranty, and includes solar diversion the Cord cannot match. The Cord Zero earns its place only when 4G connectivity is not a luxury but a necessity. If that describes your garage, pay the premium. If it does not, keep the £117.