Terms

The terms, in plain words.

What this site is, what an estimate is, and what a reservation does and does not do. Last changed on November 12, 2026.

The estimate

The price this site shows is an estimate: the K13 at $7,900, one backup switch at $1,150 and installation at $2,600 for the first unit and $900 for each further one. It does not include sales tax. It assumes no tax credit, rebate or utility incentive.

For one K13 on the wall, that is $11,650. Your installer confirms the price in writing at the site visit; only that paper is a price.

The reservation

Reserving a site visit on this site costs nothing and binds you to nothing. The reservation is kept in your browser; it is not sent, so it does not hold an installer’s time. Call us to turn it into a visit on the calendar.

Payment

This site takes no payment and asks for no card. You pay the installer, after the site visit, when you have said yes to the written price.

The figures

Hours of runtime on this site are sums: the watts you choose, times the hours a day, against 13.5 kWh. The watts are typical for each kind of appliance, not measurements of yours. Solar figures assume 4.5 sun hours on a clear day and 20% lost on the way.

Medical devices

The K13 is not a medical device. If someone in your house depends on one, ask the doctor and the maker how long it must run, and keep a plan for a long outage.

The people in the films

The household on this site is an example. The photographs and films are of models.