Your true-up bill climbed. SunPower can’t tell you why.
Your panels never stopped — only their cloud did. Plug in WattHacker and see your whole system again: a clear “all good,” or an alert the moment one panel drops.
Built for you
Not SunPower. Not an installer.
Your data
We never sell it. Export it anytime.
30-day money-back
Not for you? Full refund.
A real person
Email me. You’ll get a human.
Open it. Know in one glance.
No hunting. No spreadsheet. The answer, then the detail if you want it.
A straight answer
Working, or not. Every time you look.
Every panel
All of them, refreshed every 15 minutes.
An alert, in dollars
One drops, you hear about it that week.
What silence costs.
None of these announce themselves. All of them show up on the true-up.
- One dead panelOne 425 W panel at $0.45/kWh makes about 820 kWh a year — roughly $31 a month.425 W, stops producing
- $370a year
- Shade you never mappedThe shade analyzer's own annual total on one real roof, priced at that home's rate plan. An estimate, modelled from clear days — your roof will differ.estimated on a real roof
- $676a year
- A panel fading, not dead820 kWh a year running 24% short, at $0.45/kWh.24% below the rest of your array — invisible without per-panel data
- $89a year
Analysis SunPower never gave you.
Working today, on a real plan.
Per-panel monitoring
Every panel, every 15 minutes. Free plan included.
Shade analyzer
What shade costs, by roof face and by panel.
Degradation tracking
How fast your panels are fading, year over year.
Enphase is $999.
We’re $50.
Same data. Better analysis. 95% off other options.
Enphase — $999
A technician, a new electrical box, and half a day at home.
ENPH-CELL-KITWattHacker — $50
You connect two cables and Wi-Fi. 15 min tops.
See everything, without anyone coming to your house.
Will it work with mine?
If you have a SunPower PVS6, yes. Every panel SunPower ever installed.
Plug-and-play. Your mother-in-law could install.
- About 5 min to connect
- Plug in a USB and ethernet cable (included)No electricianNo rewiringNo hardware swap
Sit back and watch individual panel data start streaming in 15 min!
Not sure yours is a PVS6? Email me — tony@watthacker.com
Why I built this
Tony Willcox
Founder · San Mateo County, CA
I paid my last utility bill in 2021, and haven’t bought natural gas or gasoline in four years. I’ve measured every circuit and appliance in my home for years, and I use that knowledge to help others spend less on energy — producing more with solar and using less with efficient heat pumps. Data unlocked energy for me, and I want to share it with everyone.
Questions, answered
Straight answers — especially the ones a burned SunPower owner deserves.
Yes, if you have a SunPower PVS6 or an Enphase IQ Gateway (also sold as an Envoy). Both sit near your electrical panel — the Enphase one is often inside a grey outdoor box.
Still not sure? Email a photo to tony@watthacker.com and I’ll tell you.
Something else? Here’s where we stand on SolarEdge, APsystems, and others — and you can ask us to support yours.
Still wondering something? Email me — or poke around the live demo.
Three ways to buy
30 days to change your mind — we refund your whole first order.
The monitor. Free plan.
$50 monitor
$0 /yr service
plus shipping
- Panel monitoring
- Microinverter monitoring
- Full system visibility
- System alerts
- Downloadable data
- Data logs, 7 days
The monitor. Full analysis.
- Kilowatt PLUS
- Shade analyzer
- Degradation tracking
- True-up analyzer
- Battery optimizer
- Data logs, unlimited
Pay once. Never again.
Free monitor
$199 service, for life
Free shipping
Same price to upgrade later. Buy now and the monitor and shipping are free.
- Megawatt PLUS
- Free monitor
- Free shipping
- 45-min home energy review with Tony
Your panels are still working. Start watching them.
See your whole system live in 15 minutes.
30-day money-back guarantee.