For SunPower owners
Solar was expensive — is it still working?
Free solar monitor with a home energy review.
Your solar, your bill, and what's actually worth changing.
Every panel, live. Plugs in yourself. Yours to keep.
We'll review your solar panels' performance, and talk heat pumps, batteries, true-up, and more.
Hack your watts and your bill
At a high level, there are three ways.
- Produce more
- Health check — is every panel pulling its weight? See it
- Shade check — what shade costs you, month by month See it
- Expand it without losing NEM 2 Learn more
- Consume less
- Efficient appliances and heat pumps
- Find the loads quietly eating your bill
- Shift usage timing
- Move use into cheaper hours
- Make your rate plan work for you
I'll help you work out which of the three actually moves your number — and the cheapest way to get there.
What you'll leave the call with
- Peace of mind
Alerted if a panel or inverter fails. You never have to log in and check.
- Your shade cost
Per panel, per season, in dollars. Nobody else can show you this.
- Are your microinverters healthy?
Full data logs, always — and the data to support any claim you might make.
- Your road map to electrification
Running costs, energy saved, install cost, and rebates — what to do first, and next.
What our monitor shows you
Unparalleled detail on the system you already own.
- Solar
- Heat pumps
- Water heaters
- EV charging
- Induction
- Dryers
This is an unbiased review, not a sales call. I'm not a solar company — I'm someone who has spent five years minimising the energy use of one house, mine, down to the circuit. I don't sell panels, heat pumps, batteries, or installs, so I have no reason to find a problem that isn't there, and none to miss one that is.
Who's doing the review
I'm Tony Willcox. On my own house: 31 panels, 5 heat pumps, and 2 EVs — most of it installed by me, most of the cost clawed back with rebates and incentives. There's a heat pump on the hot tub. I've tracked energy use on every circuit and every appliance here for five years.
What I'm actually in this for: helping people use less energy, pay less for what they do use, and find the cheapest route there. Mostly that means building a road map — what first, what next, and how to get to net zero energy, and ideally a net zero bill, for the rest of your life.
Peninsula Clean Energy 2023 All-Electric Leader — Most Inspirational Residential Project, for “Solar and Heat Pumping to the Max”.
More on why I built this.
How it works
- 1
~5 minPurchase, plug and playYour monitor arrives. Plug it in, connect Wi-Fi. That's your part done.
- 2~2 weeksWe gather and analyse
Every panel, the whole time. Watch it yourself in the portal whenever you like.
- 345 minWe talk
1:1 call reviewing your data, and planning a road map to lower your bills.
You end up with two things: a road map to a smaller bill — and a monitor that keeps working long after the call.
Every panel, logged without limit, and an alert the moment something stops.
Will it work with my system?
If you have a SunPower PVS5 or PVS6, yes.
Plug-and-play. Your mother-in-law could install it.
- ✓ About 5 minutes to connect
- ✓ A USB and an ethernet cable, both included
- ✗ No electrician, no rewiring, no hardware swap
Panel data starts streaming about 15 minutes later.
Not sure yours is a PVS? Email me.
What $149 gets you
| 45-minute energy review, with your real data | $149 |
| A WattHacker monitor, yours to keep | $50 free |
| Solar panel health check | included |
| Shade analysis | included |
| Written summary and electrification road map | included |
| Megawatt plan — your first year included, then $72/yr after that | $0 today |
| You pay today | $149 |
We keep working after the call
Your panels are warranted for 25 years. If you've had them five, that's two decades of production still to come — and every claim you might make on it needs evidence you can only collect as it happens.
Shade and failed panels don't announce themselves. We do.
- Alerts on issuesThe moment something stops
- Data stored foreverEvery panel, no time limit
- Actionable fixesWhat to do, not just what broke
Indefinite logs
Your first month is free — decide after the call. Keep it and it's $6/mo billed annually. Drop to the free plan any time; download everything first and you lose nothing.
A third of Enphase. 40% less than SunStrong. And the only one that comes with a human who reads it with you.
$149 once — monitor and your first year included.
Or see the live demo first.
My personal guarantee. I've helped dozens of people fully electrify their homes, and every one of them has been delighted with how it turned out. I'll personally guarantee you will be too. If you're not, send the monitor back and I'll refund you in full.