Model 3 vs BMW i3

We're still keeping our 2014 BMW i3-REx as backup for our 2019 Tesla Model 3 but after some cross country trips, +700 mi each way, we have a better idea of the relative EV costs:

• 60-101 kW -> $0.26/min Model 3
• 15-60 kW -> $0.13/min Model 3
• 0-50 kW -> $0.30/min BMW i3-REx

The Model 3 supports twice the maximum charge, 101 kW, rate on a SuperCharger as the BMW i3-REx at 50 kW. The SuperCharger cost $0.26/min at 60-100 kW versus $0.30 flat rate at an Electrify America charger.

At 15-60 kW, the SuperCharger rate falls to $0.13/minute. Meanwhile, the BMW is still paying $0.30/min and it can only charge at 0-50 kW. EVgo is even more expensive than Electrify America, $0.35/min.

In summary, the BMW i3-REx charges at half the rate of the Model 3 yet at any rate, pays a high cost per minute. Neither Electrify America nor EVgo have charge-rate pricing so the slower, taper charge costs as much as the initial, high-rate charge.

Bob Wilson