Sometimes 100% is right.
Fill before a cloudy day. Leave room before a sunny one. The forecast, prices and blackout risk change the answer.
GridPassport for the heavy side of smart home
Your devices run on their terms. You pay for it.
GridPassport is a small device that coordinates large devices. It uses prices, weather and household demand to decide when the battery should charge, when heating or cooling should run and when surplus solar should be sold.
First installations: homes with solar and a home battery.
62.7% lower net cost
Best tested scenario versus a flat-import, fixed-export baseline. One PV + battery home, Jan 1-May 9, 2026. Results vary by home, tariff, devices and use. Read the case study.
Compatibility
Your hardware may already fit.
The first live home uses Deye. We check the exact model before installation.
See all compatibilityInverters, batteries and air conditioning74 brands
Deye
Sunsynk
Sol-Ark
Fronius
GoodWe
KOSTAL
SolarEdge
APsystems
Marstek
Sigenergy
Solplanet / AISWEI
Zendure
E3/DC
RCT Power
SMA
AlphaESS
Anker
sonnen
FoxESS
Growatt
Huawei
Qcells
SAJ
SolaX
Solis
Solinteg
FENECON
GivEnergy
Hoymiles
Sungrow
Victron EnergyEnphase
Sofar
ABB/FIMER
Delta Electronics
Ingeteam
KACO new energy
KStar
REFUsol
SENEC
Schneider Electric
SolarMax
VARTA
Yaskawa Solectria Solar
Daikin
Mitsubishi Electric
Mitsubishi Heavy Industries
Panasonic
LG
Samsung
Gree
Midea
Fujitsu
Toshiba
Carrier
Hitachi
Haier
Hisense
TCL
Bosch
Beko
Electrolux
Whirlpool
Sharp
AUX
Ballu
Sinclair
Cooper & Hunter
Tosot
Rotenso
Kaisai
Qlima
Vaillant
SonnigerThe problem
The devices do their job. You need them to do yours.
The hardware is good. Each device follows its own settings. You pay for what they do together: the energy bill, the comfort and the backup power left at the end.
Efficient can still be expensive.
Your A++ heat pump can run on solar at 5 p.m. and still start a costly cycle at 6. Efficiency cannot fix bad timing.
Charge or sell?
At 9 a.m., surplus solar can fill the battery or go to the grid. A fixed inverter rule cannot know which choice pays today.
What GridPassport does
One plan for solar, batteries, heating, cooling and charging.
Charge the battery or prepare heating and cooling when power costs less.
Export when that energy is worth more than keeping it for later.
Keep enough charge for the evening or a blackout.
Early evidence
One real home. 129 days of data.
415.19 EURFlat-import, fixed-export baseline
154.70 EURBest tested GridPassport scenario
260.49 EUR lessJanuary 1-May 9, 2026
GridPassport tracks changing prices for you. It chooses when to buy, store, sell or wait without asking you to watch the market. A dynamic tariff alone does not save money. These figures replay tariff scenarios against real PV, demand and battery data from one home.
Who it is for
We start with solar and a home battery.
AC is in testing. Heat pumps, hot water and EV charging come next.
Store, sell or save for later.
Cool in cheaper hours without losing comfort.
Run them at better times when comfort and deadlines allow.
Use cheap hours without watching prices.
The Passport
A quiet box that runs the energy plan 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.
Uses your existing devicesControls supported hardware locallyStores the next hours of the plan
Founding members
Get GridPassport early.
We start with homes that already have solar and a home battery. Founding Members pay 35 EUR for hardware and 59 EUR a year, and help shape what comes next.