Why can't I get 8.8kwh miles?

The portion of battery capacity for EV mode is closer to 6.1kwh. The rest is dedicated to HV mode use. The total is 8.8 Kwh.

 

To prolong the battery life, the full capacity of the battery is not used. A typical full recharge from 0% indicated is 6.6 KWh.

 

The battery will never be empty. At most, about 72% is added back each recharge.

 

With no EV range left, a charge is only adding @6kWh.

 

the cost is 11 cents times 6 = 66 cents per charge, roughly, depending on how low your battery is when charging

the number of miles per kwh has nothing to do with your cost per charge.

that would be useful for cost per mile if you're interested

however, to be sure your kWh charge is correct, include all costs on your bill related to anything over the minimum monthly charge, if there is one.

 

5.1 miles/KWh is quite good, BTW. I’ve been seeing — long-term, including bouts with high and low temps — 4.6 miles/KWh.

A Tesla Model 3, which is considerably pretty efficient EV gets only around 3.8ish miles/KWh, and the Jaguar iPace, widely acknowledged as dreadfully inefficient, gets something like 2.5 IIRC.

Anyway, I haven’t read the rest of the replies, but short summary, they reserve a 10-15% “top margin” to reduce the overcharging that can kill battery life, plus around 1KWh at the bottom is reserved for HV operation (and margin).

 

not exactly

 

the bill only shows total kwh used by the whole house. individual circuits aren't tracked.

you would need a kill a watt meter plugged into your outlet, then plug your evse into that. it would tell you what you are using, minus losses from the panel to the outlet.

 

You can put a kWh meter on you charger and get a real number.

 

that's what i do

 

If you want to track how much electricity you're actually buying for the car, there are plug-in meters like the Kill-A-Watt that will track it.

As others have said, Toyota won't let the car completely fill or drain the battery. That would kill your traction battery in short order. If you're getting 35 miles/charge, you're way ahead of the EPA estimates (25 miles) and doing average to a little above average for most Prime owners. Before the Florida heat set in, I was getting 5.5-5.8 m/kWh. Now that the air conditioner is working overtime, it's just above or below 5.0. Not quite getting 30 miles/charge anymore that it's unbearable outside. It was at least 35 miles.

 

There are charging inefficiencies from both the cable (EVSE), the charger itself inside the car and the battery. There's also the BMS (battery management systems) and the TMS (thermal management system) that regulate both the charge rate and the temperature of the pack which also requires some electricity so......

as previously stated, you need some sort of measuring device (killawatt typically recommended) to see exactly how much energy is require to "fill the tank". High tech EVSE's will report the full charge amount via an app.

 

Here is a snap from Amazon