article Slow/Fast home charging vs Rapid/Ultra-rapid public charging (2026) | 247QuickTools
⚖️ Comparison · Updated for 2026

Slow/Fast home charging vs Rapid/Ultra-rapid public charging

Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.

Quick answer: 7 kW home fast charger: adds ~35-40 miles/hour, charges a typical EV (75 kWh battery) overnight (10-11h). 50 kW public rapid: adds ~150 miles/hour, 80% charge in 35-45 minutes. 150-350 kW ultra-rapid: 80% charge in 15-25 minutes. Most daily drivers never need public rapid charging if they charge at home.
Decision guide — when to use which
Use Slow/Fast home charging when…

All daily driving: home overnight charging is the most convenient and cheapest.

Use Rapid/Ultra-rapid public charging when…

Long journeys, no home charging, urgent top-up needed.

📊 Side-by-side comparison
Aspect Slow/Fast home charging Rapid/Ultra-rapid public charging
Power 3.6 kW (slow) / 7.4 kW (fast home) 50 kW (rapid) / 150-350 kW (ultra-rapid)
Miles per hour added ~18 (3.6 kW) / ~35 (7 kW) ~150 (50 kW) / 450+ (350 kW)
Typical charge time (75 kWh) Overnight 35-45 min (50 kW) / 15-25 min (350 kW)
UK cost (2026) ~28p/kWh (home tariff) ~65-80p/kWh (public rapid)
Connector (UK) Type 2 (home) CCS / CHAdeMO (rapid)

Frequently asked

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Should I charge to 100% every night?

No — most EV manufacturers recommend charging to 80% daily to preserve battery life, with 100% reserved for long journeys. Lithium batteries degrade faster at sustained high charge levels. Some EVs have a 'target charge' setting for this.

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How much does an EV really cost per mile to run?

At 28p/kWh home electricity rate, a typical EV uses 3-4 miles/kWh, costing 7-9p/mile. Vs petrol at 140p/litre and 40 mpg: 15.9p/mile. EVs are roughly half the fuel cost of a petrol car for home-charged miles.

Reviewed for 2026. All conversion factors and historical references verified against official sources (ISO standards, government weights & measures legislation, IEC technical specifications). Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project. We don't sell SEO links or accept paid placements in this content.

Frequently asked questions

Should I charge to 100% every night?

No — most EV manufacturers recommend charging to 80% daily to preserve battery life, with 100% reserved for long journeys. Lithium batteries degrade faster at sustained high charge levels. Some EVs have a 'target charge' setting for this.

How much does an EV really cost per mile to run?

At 28p/kWh home electricity rate, a typical EV uses 3-4 miles/kWh, costing 7-9p/mile. Vs petrol at 140p/litre and 40 mpg: 15.9p/mile. EVs are roughly half the fuel cost of a petrol car for home-charged miles.