Ohme EV Charger Installation in Cornwall

Octopus Intelligent Go is the UK's leading smart EV tariff: 7p/kWh (May 2026 rate) between 23:30 and 05:30 every night, plus dynamically extended cheap windows when National Grid demand is low. The dynamic extension is where Ohme excels: as the official Octopus charger partner, Ohme communicates directly with Octopus's grid balancing system. When Octopus has surplus cheap renewable generation to dispatch (typically overnight wind), the cheap window extends earlier in the evening or later into the morning — and Ohme automatically schedules charging across the entire extended window without homeowner intervention.

The practical impact is significant. Octopus Intelligent Go customers using Ohme typically achieve 20–30% more cheap-window charging hours than equivalent customers using non-integrated chargers (which only know about the fixed 23:30–05:30 base window). For high-mileage Cornish drivers, this translates to £100–£200/year in additional savings versus equivalent generic smart chargers.

The Home Pro is Ohme's flagship: tethered (5m or 7.5m cable), large colour LCD display showing real-time charging status, scheduling, energy cost and grid carbon intensity, plus optional Plug-and-Charge ISO 15118 support for compatible vehicles. The ePod is the budget-friendly compact option: untethered Type 2 socket (bring your own cable), no display (everything controlled via the Ohme smartphone app), smaller wall footprint. Both share the same internal smart-charging electronics and Octopus integration — functionality is essentially identical, the difference is form factor and aesthetic preference.

For Cornish customers we typically recommend the Home Pro tethered for primary driveway installations (the LCD is genuinely useful, and tethered is more convenient day-to-day) and the ePod for secondary chargers or where wall space is constrained.

Ohme supports solar diversion via integration with compatible solar inverters and battery systems. While the Ohme's solar diversion is not as polished as the Zappi's three-mode system, it works well in conjunction with Octopus's smart tariffs and is being progressively enhanced via firmware updates. For solar-PV-heavy Cornish customers prioritising solar self-consumption, we still typically recommend Zappi. For Octopus Intelligent Go customers prioritising tariff arbitrage, Ohme is the clear winner.

The Ohme also integrates with home batteries for whole-home energy management — particularly relevant for our growing number of Cornish customers installing Tesla Powerwall 3, Fox ESS or Sigenergy batteries alongside their EV charger.

One under-appreciated Ohme advantage is built-in cellular connectivity (4G). Unlike most smart chargers that require home Wi-Fi for smart features, the Ohme has its own cellular SIM and internet connection — meaning it works perfectly in detached garages, boundary-mounted positions, or rural Cornish properties where Wi-Fi signal doesn't reach the charger location. This is particularly valuable in older Cornish homes with thick granite walls where Wi-Fi coverage is patchy.

Cellular connectivity is included in the unit price for the first 5 years; an optional extension is available beyond that. We've never had a Cornish customer reach the 5-year limit yet — but it's worth noting for long-term planning.

CCS handles every aspect of Ohme installation in Cornwall: site survey, supply capacity check, optimal mounting position, cable routing, consumer unit modification with Type-A RCD/RCBO addition, commissioning, app setup, Octopus tariff integration, and DNO notification where required. Most Ohme installations are 7.4kW single-phase and fall under the simplified G98 DNO notification process — CCS submits this entirely on your behalf, no homeowner action required.

For three-phase 22kW Ohme installations (less common, requires three-phase grid supply), G99 application is needed and takes 4–8 weeks for DNO approval. CCS handles this too. See our EV charger installation page for the full process.

Typical fully installed pricing (May 2026):

• Ohme ePod 7kW Untethered — from £899
• Ohme Home Pro 7kW Tethered (5m) — from £1,150
• Ohme Home Pro 7kW Tethered (7.5m) — from £1,195
• Ohme Home Pro Plus Plug-and-Charge — from £1,295
• Ohme 22kW Three-phase Tethered — from £1,650

All prices include 0% VAT (where eligible), Type-A RCD/RCBO consumer unit modification, up to 10m of armoured cable, mounting, commissioning, Ohme app setup, Octopus tariff integration where applicable, and DNO notification. See our EV charger page for the installation process.