Timber-clad family home with a solar roof and an electric car charging on the drive

Builds›Larkspur

Larkspur
Home + EV

A new timber-clad home in Castle Rock with a car on the drive. Roof, battery and charger on one order — the afternoon sun charges the car after dinner.

Home + EV Kit

Castle Rock, CO

Completed March 2026

Grid use, first year

−75%

for the house and the car together — evening charging runs from the battery.

See the numbers

The story

A new house, a new car and a big evening load.

The Whitfields moved in with an electric car and a builder’s quote for solar that left out the charger and the battery.

Car charges after dinner

Grid use −75%

Challenge

Bills over $250 with the car, nobody home in the afternoon and a builder who only did panels.

Solution

The Home + EV kit: twenty panels, the hybrid inverter with a Keeper battery and the Driveway charger — two pallets, one installer, three days.

Result

The battery stores the afternoon sun and charges the car after dinner. House and car together bought 75% less from the grid in the first year.

Spec sheet

The build, line by line.

Figures from the order, the gateway and the owner, checked with them in October 2026.

Ask an engineer about it

Location
Castle RockCO

Kit
Home + EV8.6 kW

Panels
20× 430 W

Charger
Driveway11.5 kW

Fitted by
Certifiedinstaller

Evening charging
Battery

Yearly output
12,900kWh

Completed
Mar 2026

Parts in this build

One kit for the roof, the wall and the drive.

Everything for the house and the car came in the Home + EV kit; the gateway shows which one is using the sun.

Home + EV kit: black solar panels, home battery and wall-mounted EV charger

1 kit

Roof Kits

Home + EV Kit 8.6 kW

$15,240

White energy monitor gateway with two clamp-on sensors

Accessories

Sunbox Energy Monitor Gateway

$199

On site

Roof, wall and drive in three days.

Panels went up on day one, the battery and inverter on day two and the charger on day three — then the car’s first full charge from the sun.

Home at dusk with solar panels on the roof and an electric car charging on the drive

First evening charge from the battery

Wall-mounted home EV charger on a timber garage wall with a car parked in front

Driveway charger on the timber wall

Shrink-wrapped pallet of boxed solar parts on a suburban driveway

Two pallets on delivery day

Grid power bought a year, before and after

−75% a year

Before

13.6k

After

3.4k

Monthly solar output, first year · kWh

May–Aug in teal

710

840

1.1k

1.2k

1.4k

1.2k

970

710

640

The first year in numbers

12,900kWh

from twenty panels in year one

11.5kW

charger on solar mode

3days

for the certified installer

“The builder quoted panels. Sunbox quoted the house we actually live in — the car, the evenings, all of it.”

Chris Whitfield
Verified buyer · Home + EV Kit

Same kit

Car on the drive?

The Home + EV kit is sized for bills over $250 and a car — on one order.

Shop the Kit

Grand Junction brick bungalow with solar on a terracotta tile roof

Previous project
Mesa View Bungalow
Starter Roof Kit · 4.3 kW

Next project
Highlands Ranch Single-Storey
Family Home Bundle · 5.2 kW

Single-storey ranch house with two rows of solar panels on a grey shingle roof

Free parts list · one working day

Send us your roof. We’ll send the cart.

Share a recent power bill and your address. An engineer sizes the system and emails a ready-to-checkout cart — like the one in this build.

Get My Parts List

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+1-⁠555-⁠0168
Mon–Sat · 7:00–⁠19:00

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LarkspurHome + EV