EV charging Level 2, 32 A: how much battery you need
EV charging Level 2, 32 A draws about 7700 W (7700 W range), runs 100% of the time and uses 30800 Wh per day. Start-up surge: 7700 W.
ChargePoint Home Flex at 32 A delivers 7,700 W. On backup, set the charger to its lowest current.
Battery needed
| Hours | Wh | Battery (Wh) | Inverter (W) |
|---|---|---|---|
| For 8 hours | 10267 | 15556 | 8470 / 7700 |
| For 24 hours | 30800 | 46667 | 8470 / 7700 |
| For 72 hours | 92400 | 140000 | 8470 / 7700 |
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Stations that fit (24 h)
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FAQ
How many watts does a EV charging Level 2, 32 A use?
Typically 7700 W while running, with a range of 7700 W depending on model and age. Start-up surge can reach 7700 W.
How long will a 1000 Wh power station run a EV charging Level 2, 32 A?
About 0.1 hours on the clock, allowing for the 100% duty cycle, inverter losses and a 20% reserve.
What size power station do I need for a EV charging Level 2, 32 A overnight (8 h)?
About 15556 Wh of battery and an inverter rated at least 8470 W continuous with 7700 W surge.
Can I run a EV charging Level 2, 32 A on solar during an outage?
You need roughly 20534 W of panels in winter to replace a day's use (30800 Wh), charging through a station with a big enough MPPT input.
Other sizes
Other appliances
1 Approximate values: estimated from motor or heater power and typical figures published online, not from a manufacturer chart. Check your appliance label.
Inverter efficiency 88%, usable depth of discharge 90%, reserve 20%. Full method: How we calculate. source