Sometimes 100% is right.
Sometimes 52% is better. Sometimes 27%. Cheap power, tomorrow's sun and blackout risk change the answer.
GridPassport for the heavy side of smart home
Your devices run on their terms. You pay for it.
Solar Battery Heat pump AC Hot water EV charging
GridPassport is a small device that coordinates large devices. Solar, batteries, heating and more. It balances comfort, blackout protection and savings. It is built to use the volatility.
~60% savings
Interested? See the first GridPassport case study: PV + battery home, Jan 1-May 9, 2026.
The problem
The devices do their job. You need them to do yours.
The hardware is not the problem. Solar inverters, batteries, heat pumps, chargers and climate systems are solid engineering. The gap appears when each device pursues its own job while the owner needs one result: lower cost, real comfort and power left when it matters.
Efficient can still be expensive.
An A++ heat pump can heat at 5 on solar and again at 6 on expensive grid power. It should have done the first and skipped the second.
Charge or sell?
Your inverter does not even ask that question. It may fill the battery because that is its job, even when selling the surplus pays more.
What GridPassport does
It gives the heavy side of your smart home a brain.
Use cheap or clean energy when the home can actually benefit from it: charge the battery, prepare comfort or fill flexible loads without creating a new problem.
Export only when it is worth more than storing, using or saving that energy for the home.
Keep enough energy for comfort, evening use or a blackout before a single device spends it for its own goal.
Early evidence
One real home. Early results.
15-26% Expected range
62.7% Observed with dynamic prices
Jan 1-May 9 One PV + battery home
GridPassport is built to use the volatility. Fixed tariffs make the home a price taker. Dynamic tariffs create movement, but movement only helps when the home knows when to buy, sell, store and wait without asking the homeowner to watch the market.
Who it is for
GridPassport starts to matter when your home has more than one serious energy device.
Store, sell or save for later.
Charge the car without confusing the house.
Move comfort to better hours.
Use price movement instead of fearing it.
The Passport
A quiet box that thinks about energy for you.
Every 15 minutes, it reads prices, weather, solar and household demand, then tells your hardware what the home needs next. Even when the forecast changes at 4 a.m.
Founding waitlist
Help shape the first generation of GridPassport.
We are starting with homes that already have solar and a home battery. EV charging, heating, cooling and other large energy devices come next.