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Ranch-style home with rooftop solar and an electric car charging from a garage wall charger
Ranch-style home with rooftop solar and an electric car charging from a garage wall charger
Builds›Okafor Charger

Okafor
Driveway Charger

A 2021 roof in Fort Collins and a new electric car. A Driveway charger set to solar mode — and a wrong cable length swapped in four days, free.

EV Charger
Fort Collins, CO
Completed August 2026
Miles from the sun
 
 
≈70%

of the car’s charging from April to October now comes straight off the roof.

The story

A roof that exported its best hours.

Dan Okafor’s roof made more than the house used at midday, and the new car charged at night from the grid.

Solar mode on
Cable swapped free
01
Challenge
A 6 kW roof exporting at noon, a car charging at night and a driveway further from the garage wall than Dan measured.
02
Solution
The Driveway 11.5 kW charger with solar mode: it charges from surplus roof power and tops up off-peak. Dan ordered the short cable — we swapped it for the 7.3 m in four days at no charge.
03
Result
From April to October about 70% of the car’s charging comes off the roof, and the grid power bought for the car fell by more than two thirds.
Spec sheet

The build, line by line.

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

Location
Fort CollinsCO
Charger
Driveway11.5 kW
Existing roof
6kW · 2021
Mode
Solar+ off-peak
Fitted by
Licensedelectrician
From the sun
≈70%Apr–Oct
Cable
7.3 mswapped in
Completed
Aug 2026
Parts in this build

A charger and the clamps that steer it.

Solar mode needs to see the roof: the gateway’s two clamps tell the charger how much surplus there is, minute by minute.

White wall-mounted EV home charger with a coiled black cable
1
EV Chargers
Driveway 11.5 kW Home Charger
$649
White energy monitor gateway with two clamp-on sensors
1
Accessories
Sunbox Energy Monitor Gateway
$199
On site

One wall, one breaker, one swap.

The electrician fitted the charger and a new breaker in a morning; the longer cable came to the door four days after Dan rang.

Driveway charger on the garage wall
New breaker in the panel
The replacement cable at the door
 

Grid power bought for the car a year

−71% a year
Before
 
3.4k
After
 
 
1.0k
Roof output by month · kWh — the charger follows it
May–Aug in teal
480
 
J
570
 
F
740
 
M
830
 
A
910
 
M
960
 
J
960
 
J
910
 
A
780
 
S
650
 
O
480
 
N
440
 
D
The first year in numbers
11.5kW
charger, 48 A, on solar mode
4days
to swap the wrong cable — no charge
70%
of Apr–Oct charging from the roof
 
“I ordered the wrong cable length — my mistake. They swapped it in four days and didn’t charge for the return.”
DO
Dan Okafor
Verified buyer · Driveway 11.5 kW Charger
Same charger

Car on the drive?

The Driveway 11.5 kW charger has a 7.3 m cable, load balancing and solar mode.

Two-storey Fort Collins house with black solar panels on a grey shingle roof
Previous project
Nair Family Home
Whole-Home Bundle · 5.2 kW + 13.5 kWh
Next project
Pine Gulch Cabin
Cabin Off-Grid Kit · 1.7 kW
Timber mountain cabin with four solar panels on a green metal roof
 
 
 
 
 
 
 
Free parts list · one working day

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