🚗EV Home Charging
EV Home Charging & Home Wallbox Calculator
Home charging speeds & solar off-peak tariffs
📍Location-calibrated simulation by town or outward postcode:
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Charging Speed & Surplus
EV Charging Speed & Cost London
Estimate charging duration and compare grid vs. solar surplus cost for London.
Charge Duration (20% → 80%)
5 Std. 44 Min.EV Battery Size
65 kWh
15 kWh (Compact / City EV)140 kWh (Large SUV / Luxury)
Charging Power
Starting State of Charge
%
Target State of Charge
%
Electricity Unit Rate Auto-Sync
p/kWh
Currently calculating with: 25.4 p/kWh
📍London (7.5 p/kWh DUoS Charge)
Cost per Charging Session
Grid Power Charging£10.79
£5.26 / 100 miSolar Surplus Charging£5.09
£2.48 / 100 miSolar Surplus Benefit
+ £5.70per full session
Delivered energy: 39.0 kWh net (42.4 kWh gross from meter incl. 8% AC losses).
Fuel cost delta per 100 miles: ~£2.78 cheaper
❓Frequently Asked Questions: EV Home Charging
Key UK engineering benchmarks, Ofgem standards, and clean energy incentives at a glance:
Why is a dedicated 7kW home charger preferred over a 3-pin plug?▼
A dedicated 32A 7kW home charger delivers roughly 25 to 30 miles of range per hour (3x faster than a 3-pin socket). It complies with UK Smart Charge Points Regulations and avoids thermal overheating risks on standard domestic ring mains.
What are the UK Smart Charge Points Regulations 2021?▼
UK law requires all private EV chargepoints sold to incorporate smart functionality, randomised delay protection, and default off-peak charging hours to protect national grid infrastructure during evening demand peaks.
What electrical requirements are needed for a 7kW home charger?▼
A dedicated 32A / 40A miniature circuit breaker (MCB) or RCBO, suitable Type A or Type B RCD protection with open PEN fault detection, and notification to your Distribution Network Operator (DNO).
What is solar surplus EV charging and how does it work?▼
Solar-aware chargepoints (such as myenergi zappi or Ohme) monitor household electricity flow with a CT clamp and feed only unconsumed solar generation into the vehicle, providing 100% free domestic driving.
What is the cost comparison between home charging and petrol?▼
Charging on a smart off-peak EV tariff (typically 7p to 9p per kWh) costs roughly 2p to 3p per mile. Driving an average 40 mpg petrol vehicle costs approximately 15p to 18p per mile, saving £1,200+ annually.
Can tenants or flat owners receive grant funding for home chargers?▼
Yes. The OZEV EV Chargepoint Grant provides up to 75% (capped at £350) towards the purchase and installation of a dedicated smart chargepoint for qualifying renters and flat owners across the UK.
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Suggestion or Feature Request?
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