Manifesto

The Grid is Growing Up

More homes now produce, store and shift energy. The grid remains essential, while each equipped home has become a small power system.

That change starts with familiar equipment: solar on the roof, a battery on the wall, climate systems and a car in the garage. Those devices need one shared plan.

Good hardware is no longer enough

Solar inverters, batteries and air conditioners are already strong products. Their limits appear when the home has several of them and each follows its own rules.

Each manufacturer can optimize its own device. The household still has one bill, one comfort level and one backup reserve. The next source of value is coordination: making good products act on the same household priorities.

The Passport

We call the local point of coordination The Passport. It is a small purple box, roughly the size of two matchboxes. It stays near the devices so GridPassport can read supported systems and act locally.

We designed it to sit on a LEGO base because it’s effective and fun. Infrastructure can be fun.

The Passport has to be affordable, useful and ordinary. We want it to earn its place in every home with serious energy devices, much like a router or fusebox. Less gadgetry, more impact.

The Long Game

This change will take years. We have the patience to build it in real homes and get the engineering right.

The plan has two stages:

The Home: Synchronize the high-powered hardware inside your walls.
The Grid: Connect those homes so they can support the wider energy system together.

We start with solar inverters, home batteries and air conditioning. As those integrations prove reliable, we will expand to heat pumps, EV chargers and other devices that can produce, store or shift energy.

Founders

Kamil and Filip

Kamil Janiszewski and Filip Miłoszewski at a Listonic event.

GridPassport is led by Kamil Janiszewski and Filip Miłoszewski.

We have been friends for 25 years and professional partners for nearly 20. That history lets us work on a hard problem without pretending it will be solved quickly. Kamil leads the product and energy architecture. Filip leads the consumer product point of view.

Under Filip’s guidance, our team has created applications awarded for excellence by Apple and Google and used by millions of people worldwide—including Listonic, a global benchmark for consumer utility.

Together, we have spent two decades making complicated software useful in everyday life. GridPassport applies that experience to the devices, tariffs and decisions inside a modern home.

The first version of GridPassport has been active in one home since January 1, 2026. It is raw and still changing, but it already automates decisions that used to require manual work. In the strongest tested safe scenario, net cost was more than 50% lower. That is evidence from one home, not a promise for every household. It is enough reason to keep building.

Join the work

The direction is clear.

Homes will keep adding solar, batteries, electric heating, cooling and charging. We are building the system that helps those devices work together.

Apply for early access See The Passport