Zach Dell

The customer then is paying us $17 a month.

That comes out to $200 a year.

And the average person's electricity bill is on the order of $150 a month, $1,800 a year at a 10%, 15% gross margin.

That's anywhere from 180 to a little over $200 a year in margin.

So it's $200 a year in margins from retail power, $200 a year in margin from the monthly payments.

And then the battery is used to do energy arbitrage, as we discussed.

And we do a bunch of modeling to figure out what is that worth.

In some years, it's worth $100 a kilowatt hour.

In some years, it's worth $20 a kilowatt hour.

Those cash flows are extremely spiky.

So in 2023, you had an incredibly profitable year for batteries.

In 2024, you had a less profitable year for batteries.

And so when you think about, when you get into this, when you think about financing this kind of asset with super volatile cash flows, you obviously have to take that into consideration.

Our math suggests that a battery in ERCOT over the next 10 years will average on the order of $40 a kilowatt hour.

If we're installing a 30 kilowatt hour battery, which is the form factor of our Gen 2 product, that's $1,200 of trading income a year.

$40 a kilowatt hour times 30 kilowatt hours.

So you have $1,200 of income off the energy trading.

You have $200 of gross margin from retail power.

That's $1,400 of margin.

And you have $200 of margin from the customer payments.