Which Portable EV Charger to Choose: 3.5kW or 7kW?

If you’re considering a portable EV charger, one of the biggest decisions you’ll face is choosing between a 3.5kW and a 7kW model. Each has advantages, but which is best for your vehicle and lifestyle? This guide will break down the key differences, helping you make an informed decision.

What’s the Difference Between 3.5kW and 7kW Chargers?

Comparison of Tayniu 3.5kW vs 7kW portable EV chargers – Smart LCD screen, plug types, and charging speed differences.

Feature3.5kW Charger7kW Charger
Charging SpeedSlowerFaster
Full Charge Time (40kWh Battery)~12 hours~6 hours
Suitable forPHEVs, occasional chargingFull EVs, daily use
Power Consumption3.5kWh per hour7kWh per hour
Installation RequirementStandard 16A outlet32A outlet
CostLower upfront costHigher upfront cost

Charging Speed Comparison

A 3.5kW charger is ideal for plug-in hybrid electric vehicles (PHEVs) or drivers who don’t need fast charging. If you drive short distances daily and typically charge overnight, a 3.5kW charger may be sufficient.

A 7kW charger is better suited for full-battery electric vehicles (BEVs) and frequent drivers who need faster top-ups. It’s also useful if you charge during the day rather than overnight.

How Long Does It Take to Charge an EV?

EV ModelBattery Size3.5kW Charging Time7kW Charging Time
Nissan Leaf40kWh~12 hours~6 hours
Tesla Model 3 SR+50kWh~14 hours~7 hours
Hyundai Kona EV64kWh~18 hours~9 hours

Cost and Energy Efficiency Breakdown

The 3.5kW charger is more energy-efficient for light EV users, as it draws less power and is compatible with standard 16A outlets. This may be a cost-effective choice if you charge primarily at night with lower electricity rates.

The 7kW charger, while consuming more electricity, can help you save time and reduce range anxiety. However, ensure your home electrical system supports 32A power delivery before purchasing.

Best Portable EV Chargers for Home and Travel

If you’re looking for a high-quality 3.5kW or 7kW portable EV charger, Tayniu offers reliable options with Type 1, Type 2, and GB/T compatibility, multiple safety protections, and an IP66 waterproof rating.

Check out our Tayniu Portable EV Chargers for more details.

FAQs: 3.5kW vs 7kW – Which One Should You Choose?

Q1: Is a 3.5kW charger enough for daily use?

A: Yes, if you primarily drive short distances and charge overnight. However, for long commutes or full EVs, a 7kW charger is recommended.

Q2: Can I use a 7kW charger with a 16A outlet?

A: No, a 7kW charger requires a 32A outlet. If your home only has a 16A outlet, a 3.5kW charger is your best option unless you upgrade your electrical system.

Q3: Which charger is best for a Tesla?

A: For Tesla vehicles, a 7kW charger is ideal, as it significantly reduces charging time. A 3.5kW charger can work, but it will take much longer.

Q4: Still Not Sure? Let’s Find Your Perfect EV Charger!

A: Choosing the right charger depends on your vehicle, driving habits, and charging needs. If unsure, use our EV Charger Quiz to get personalized recommendations!

Last Updated on February 7, 2025 by tayniu