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EV Charging for Businesses with Solar: 2026 UK Guide

Workplace EV charging with solar integration: OZEV grant £350/socket, 7kW vs 22kW vs 50kW DC, backoffice platforms (Monta, Pod Point, Char.gy, Mer). Full ROI.

SEO Dons Editorial • 2 April 2026 •Updated 4 May 2026

Workplace EV charging combined with rooftop solar is one of the strongest cap-ex pairings available to UK businesses in 2026. The economics work because three benefits stack: OZEV grant funding, employee benefits in kind that convert taxable to tax-efficient remuneration, and direct use of self-generated solar electricity at zero marginal cost. For fleet operators the case strengthens further — fuel cost reduction can reach 60–80% per vehicle.

This guide walks the 2026 UK landscape: charger types, the OZEV grant detail, backoffice platforms, integration with rooftop solar, and the ROI calculation for fleet versus visitor charging.

The 2026 grant landscape: OZEV and beyond

The Office for Zero Emission Vehicles (OZEV) administers the principal UK grant for workplace charging. As of 2026:

Workplace Charging Scheme (WCS)

Grant amount: £350 per socket, up to 40 sockets per business per site.
Eligibility: UK businesses, registered charities, public sector bodies.
Approved installers only: Must use OZEV-approved installers.
Approved hardware only: Charger must be on the OZEV-approved list.
Application route: Online via the OZEV portal, application before installation.
Coverage: All UK including Scotland, Wales, NI.

For a 10-socket installation costing £45,000 (typical), £3,500 of grant covers ~7.8% of cap-ex. Modest but real.

For full WCS detail see GOV.UK’s WCS page.

EV Infrastructure Grant for Staff and Fleets

Grant amount: Up to £15,000 per site — covers cap-ex on supply infrastructure (cabling, switchgear, transformer upgrades) separate from the chargers themselves.
Eligibility: Fleet-operating SMEs.
Use case: Where existing electrical capacity is insufficient for chargers and reinforcement is needed.

Rapid Charging Fund (large operators)

For fleet-scale operators (100+ vehicles) or motorway service operators. Rapid charging cap-ex partial-grant funding. Application by submission, not online.

Local authority and MCA grants

Several Mayoral Combined Authorities run charging-specific cap-ex grants stacking with OZEV:

TfL Plug-in Workplace Scheme (London) — periodic.
GMCA Clean Air Plan-related charging support.
WMCA EV infrastructure support for SMEs.

Check your regional CA/MCA — see also our grants and funding guide.

Charger types: 7 kW, 22 kW, 50 kW DC explained

Type	Power	Charge time (60 kWh battery)	Typical use case
7 kW (slow AC)	7 kW (single phase)	~9 hours	Workplace overnight, employee commute
22 kW (fast AC)	22 kW (three phase)	~3 hours	Workplace daytime, employee top-up, visitor
50 kW DC (rapid)	50 kW (DC)	~1 hour	Fleet, depot vehicles, public-facing
150 kW DC (ultra-rapid)	150 kW (DC)	~25 min	Motorway services, retail, transit hubs

Cap-ex per socket installed in 2026 typically:

7 kW AC: £700–£1,200 per socket
22 kW AC: £1,500–£2,500 per socket
50 kW DC: £15,000–£25,000 per unit
150 kW DC: £40,000–£80,000 per unit

For solar-integration analysis below, we focus on AC chargers (7 kW and 22 kW) because DC ultra-rapid chargers exceed typical commercial PV capacity.

How solar integrates with EV charging

Three integration models, each with different economics:

Model 1: Independent installation (no integration)

Solar generates and feeds the building’s panel; chargers draw from the same panel; the building’s EMS handles allocation. Simplest model, no specific integration software.

Economics: The chargers consume electricity at the prevailing site marginal cost — which is grid-rate when solar is unavailable and ~zero when solar is exporting surplus. Effective average cost on a typical mid-day office charging shape: £0.06–£0.12/kWh net of solar self-consumption.

Model 2: Solar-aware charger management

Charger management software (Monta, Pod Point, Char.gy, Octopus Energy Pro, Mer) reads building meter and PV inverter data, modulates charging rate to maximise solar self-consumption.

Economics: Effective EV charging cost drops to ~£0.04–£0.08/kWh on solar-saturated days, vs grid rate £0.26+ otherwise. Annual fuel saving for a fleet operator with 20 vehicles charging at workplace: £8,000–£15,000 vs grid-only.

Model 3: Solar + battery + EV charging (full energy management)

Battery captures solar surplus, releases to chargers in the evening. Best fit for sites with overnight fleet charging requirement and high mid-day solar generation.

Economics: Time-of-use spread captured both for the building and the chargers. Adds the full battery cap-ex (~£100,000 for a 200 kWh system — see our battery analysis) but enables overnight EV charging from solar via battery.

Backoffice platforms: who does what

The “backoffice” is the cloud platform that handles user authentication (RFID/RFID), session management, billing, reporting and integration with other building systems.

Platform	Strengths	Typical use case
Monta	Open hardware, multi-OEM, good API, fleet management features	Mixed fleets, SMEs
Pod Point Connect	Strong UK retail brand, integrated hardware	Retail, hospitality
Char.gy	Lamp-post and on-street, public charging	On-street, multi-tenant
Mer (formerly Innogy)	Fleet-oriented, strong Northern European footprint	Fleet operators
Octopus Energy Pro	Energy supplier integration, smart tariff	Octopus customers
GridServe	Premium UK destination charging	Retail destination
Allego	Pan-European fleet	Multi-country fleets
Ohme	Smart charging, Octopus pairing	Single-fleet, simple needs

For most UK SMEs, Monta and Pod Point dominate the workplace and small-fleet market. For mid-sized fleet operators (20+ vehicles), Mer or Allego provide deeper fleet-management features.

RFID, RAID, and authentication

User authentication for workplace charging typically uses RFID cards (sometimes mistakenly called RAID — Random Authentication ID). Two main approaches:

RFID per user — each authorised user holds a card, taps to start a session. Useful when usage is mixed (employees, visitors, fleet drivers).
App authentication — Monta, Pod Point, Octopus app-based authentication with mobile QR or BLE.
Open-API roaming — backoffices increasingly support roaming so a Pod Point card works at a Char.gy charger.

For fleet operators the practical implementation is per-driver RFID with backoffice billing back to the fleet account. For employee BIK use cases, app-based authentication is common.

ROI for fleet operators vs visitor charging

The economics are very different for different use cases.

Fleet operator: 20 vehicles, 10,000 miles/year each

Total fleet kWh: 20 × 10,000 × 0.30 kWh/mile = 60,000 kWh/year
60% charged at workplace (overnight + workdays): 36,000 kWh
40% charged on public networks: 24,000 kWh

Workplace charging cost:

Without solar integration: 36,000 × £0.26 = £9,360 / year
With 100 kW solar + smart management: 36,000 × £0.10 (effective) = £3,600 / year
Annual saving from solar integration: £5,760 / year

Avoided fleet card / public charging fees: for 36,000 kWh shifted from public to workplace, average public network rate £0.50/kWh, workplace cost £0.10/kWh — saving £14,400/year vs all-public.

Total annual fleet fuel saving vs petrol/diesel: typical £4,500/year per vehicle = £90,000 for 20 vehicles, of which £20,160 is incremental from solar integration.

ROI on a £45,000 charger installation (10 sockets) plus £170,000 solar (200 kW): combined cap-ex £215,000. AIA-adjusted post-tax cost £161,250. Annual saving £20,160 + £34,200 (solar saving) = £54,360. Effective payback ~3.0 years.

Visitor / customer-facing charging

A different use case. The economics here are:

Driver pays for charging at retail-style rate (typically £0.40–£0.60/kWh in 2026).
Operator captures margin between cost (~£0.08/kWh net of solar) and retail rate.
Marketing benefit (footfall, dwell time) — relevant for hotels, retail, hospitality.

For a 6-bay 22 kW visitor installation in a hotel car park:

60% utilisation, 8 hours/day, 22 kW per bay: 6 × 0.6 × 8 × 22 = 633 kWh/day
230,000 kWh/year delivered
Cost: 230,000 × £0.10 = £23,000
Revenue: 230,000 × £0.50 = £115,000
Gross profit: £92,000/year before card fees and operations costs.

Net of platform fees (typically 15–20%) and operations: ~£70,000/year. Cap-ex on 6 × 22 kW + DNO upgrade + paving: ~£75,000. Effective payback ~1.1 years, dominantly from charging revenue not energy savings.

This is why visitor charging works: the price-arbitrage between cost and retail tariff is enormous.

Employee BIK use case

A growing case in 2026: employer provides EV charging at the workplace as a tax-efficient employee benefit (workplace charging is exempt from BIK under section 237A ITEPA 2003).

For 50 employees each charging 50% of their household EV needs at work:

50 × 4,500 kWh/year × 50% = 112,500 kWh/year delivered
Cost: £11,250
Equivalent home electricity cost saved by employees: 112,500 × £0.30 = £33,750
Effective benefit value to employees: £675/year each at zero BIK cost.

For employers competing for talent in mid-market sectors, this is a low-cost recruitment benefit equivalent to a meaningful pay rise.

Site capacity and DNO: the practical constraint

Adding 10 × 22 kW chargers means adding up to 220 kW of new electrical demand. This usually exceeds the existing site supply capacity for most SMEs.

The DNO conversation:

Sub-100 kW total addition: typically possible without G99 DNO process (treated as load, not generation).
100–500 kW addition: G99-equivalent supply capacity upgrade — often a 6–12 month timeline and £15,000–£75,000 cost.
500 kW+ addition: full transformer or supply upgrade.

Key tactic: smart load management (charger backoffice software detects available capacity and modulates charge rate) avoids needing supply upgrade in many cases. A 10-socket installation with smart load management can run on a 100 kW supply via dynamic allocation.

Installation timeline

For a typical commercial workplace charging installation:

Week 1–2: Site survey, electrical capacity assessment.
Week 3–4: OZEV WCS application.
Week 5–8: DNO supply review (if upgrade needed).
Week 9–12: Installation works.
Week 13: Commissioning, charger registration, backoffice setup.
Week 14: Operational.

End-to-end, 3–4 months for a standalone installation, longer if supply upgrade required.

Common pitfalls

Not applying for OZEV WCS before installation. Disqualifies the grant.
Choosing a charger not on the OZEV approved list. Disqualifies grant.
Underestimating supply capacity. Adding 10 × 22 kW chargers to a 100 kW supply causes brownouts unless smart load management is in place.
No half-hourly meter for new charging supply. Limits fleet-operator data and SEG eligibility for solar integration.
Cheap chargers without OCPP support. OCPP (Open Charge Point Protocol) is the open backoffice standard. A non-OCPP charger locks you to one platform.
Forgetting accessibility (Equality Act). Public-facing chargers must comply with accessibility standards — bollard placement, clear signage, accessible socket height.

Bottom line

For UK businesses in 2026, the case for workplace EV charging is rarely about charger ROI alone — it’s about solar-integrated total energy economics. A 200 kW solar installation paired with a 10-socket smart workplace charging deployment, a fleet of 20 vehicles, and a backoffice platform that maximises self-consumption, typically pays back in 3 years and converts £90,000+ of fuel cost into ~£15,000 of marginal electricity cost.

For visitor-facing operations (hotels, retail, hospitality) the calculus tilts further favourable due to retail-rate revenue capture.

Don’t think about chargers in isolation from solar. Think about your site’s total energy demand, the load shape, the fleet pattern, and the right combination of solar, battery and chargers. The whole-system view delivers the ROI; the chargers alone don’t.

For an integrated solar + EV charging quote, request a quote. For sector-specific charging patterns see hotels, logistics, warehouses and retail.