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Two-storey home in Boulder with a row of all-black solar panels on a grey shingle roof
Two-storey home in Boulder with a row of all-black solar panels on a grey shingle roof
Builds›Nair Home

Nair
Family Home

A two-storey Boulder home that used most of its power after dark. The Whole-Home Bundle, a layout redrawn on a Friday night and a certified installer for two days.

Whole-Home Bundle
Boulder, CO
Completed March 2026
Grid use, first year
 
 
−78%

the battery stores the afternoon sun and runs the house through the evening.

The story

Two roofs, two directions, one evening peak.

Priya Nair and her family are out all day and home all evening. Panels alone would have exported the sun and bought it back at night.

Evening use covered
Grid use −78%
01
Challenge
An east and a west roof, a string-sizing question nobody had answered and most of the use between 5 and 11 p.m.
02
Solution
Priya rang at 7 p.m. on a Friday. An engineer split the twelve panels across the hybrid inverter’s two inputs and emailed the new layout before she hung up. A certified installer fitted it in two days.
03
Result
The Keeper battery fills by mid-afternoon and carries the evening. In the first year the house bought 78% less power from the grid.
Spec sheet

The build, line by line.

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

Location
BoulderCO
Kit
Whole-HomeBundle
Battery
13.5kWh Keeper
Inverter
Hybrid7.6 kW
Fitted by
Certifiedinstaller
Yearly output
7,600kWh
Grid use
−78%year one
Completed
Mar 2026
Parts in this build

The bundle, plus the gateway.

Twelve panels, the hybrid inverter and the Keeper battery came matched and cabled on one pallet. The gateway shows where every kWh goes.

Whole-home solar bundle: black panels, white home battery, hybrid inverter and solar cable
1 bundle
Roof Kits
Whole-Home Bundle 5.2 kW + 13.5 kWh
$11,980 $12,890
White energy monitor gateway with two clamp-on sensors
1
Accessories
Sunbox Energy Monitor Gateway
$199
On site

Two days, one installer, no surprises.

Panels on day one, the inverter and battery on the garage wall on day two — then a walk-through of the app.

Handover on day two
Inverter and isolator on the garage wall
First evening on the battery
 

Grid power bought a year, before and after

−78% a year
Before
 
9.8k
After
 
 
2.2k
Monthly solar output, first year · kWh
May–Aug in teal
420
 
J
490
 
F
650
 
M
720
 
A
800
 
M
840
 
J
840
 
J
800
 
A
680
 
S
570
 
O
420
 
N
380
 
D
The first year in numbers
13.5kWh
stored by mid-afternoon on a sunny day
2days
for the certified installer, start to finish
78%
less power bought from the grid in year one
 
“I rang about string sizing at 7 p.m. on a Friday. An engineer redrew my layout and emailed it before I hung up.”
PN
Priya Nair
Verified buyer · Whole-Home Bundle
Same bundle

Home after dark?

The Whole-Home Bundle is our most chosen system for bills of $150–250 with evening use.

Detached garage with solar on the roof and a battery cabinet inside
Previous project
The Bell Garage Roof
Starter Roof Kit · 4.3 kW
Next project
Okafor Driveway Charger
EV Charger · 11.5 kW
Boulder ranch home with rooftop solar and an electric car in the driveway
 
 
 
 
 
 
 
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.

Rather talk to an engineer?

Engineers answer the phone, not a script.

+1-⁠555-⁠0168
Mon–Sat · 7:00–⁠19:00
hello@sunboxsupply.example
Answered the same working day