01 — THE ENERGY PAVILION
It shelters the car,
powers the house,
and trades while you sleep.
A glulam timber pavilion with a full-black solar roof, a battery in a concealed cabinet, and software that buys electricity when the wholesale price falls below zero. Prefabricated, delivered as cassettes, installed in a day.
02 — TWO SOURCES, ONE BATTERY
The sun is only half of it.
Every solar company will tell you about the sun. Almost none will tell you what happens in December, when a roof in Amsterdam produces a seventh of what it made in June. We will: it produces very little, and on its own that would make a large battery a poor investment.
So the battery does something else as well. It watches tomorrow’s wholesale prices, fills itself when electricity is cheap, free or priced below zero, and empties into your house through the evening peak. It earns on the shortest, greyest day of the year.
Sunlight, used on site
A roof of 13.5 kWp generates between 12,400 kWh in Vilnius and 23,500 in Abu Dhabi. With storage, 70–85% of it is consumed in your own house rather than exported at a fraction of its worth.
Wholesale prices, traded
German day-ahead prices swung by an average of €130 per MWh every day in 2025, and fell below zero for 576 hours. From January 2026 stored electricity is no longer charged grid fees twice, which is what makes this worth doing.
Value on every day of the year
In Paris, Amsterdam and Vilnius, adding grid trading raises annual value by 50–54% and cuts payback from over twenty years to under sixteen. The worse your winter, the more the trading matters.
02:40, wholesale price −€14/MWh
“In December, a roof in Vilnius makes almost nothing. Your battery will still earn money every night.”
03 — EVIDENCE
What it saves, where you live
Twenty-five locations. No averages.
Solar yields here come from PVGIS at each specific city, not from a regional average. Retail prices are the published local tariffs, and only the avoidable portion counts — in Spain the contracted-power charge cannot be displaced, so we do not pretend it can.
04 — THE RANGE
Three pavilions. Storage priced separately, on purpose.
Most companies bundle a battery you did not choose into a price you cannot unpick. We separate them, because the right battery in Munich is not the right battery in Faro, and because you deserve to see what each part costs.
Compact · one bay
A single-car pavilion for a townhouse drive or a courtyard.
The smallest structure that still carries a full hybrid inverter, a working buffer battery and a charger. One 11 kW charger.
Signature · two bays
The pavilion the range is designed around.
Two bays under one uninterrupted roof plane. GL24h glulam, 15–20 kW hybrid, LFP cabinet, screw piles. 13.5 kWp, one 11 kW charger.
from, ex-VAT · source catalogue
€24,900
Estate · three and a half bays
For two cars, a workshop, or landscape architecture.
Twenty kilowatt-peak and two charging points. Two 11 kW chargers.
from, ex-VAT · source catalogue
€36,900
05 — DROP & DONE
One day. Three people. One crane.
The pavilion arrives as indexed cassettes sized to the 2.55 metre trailer width, which is why it can reach any European address without a special permit. Foundations are screw piles, set the week before. On the day itself the structure goes up, the roof cassette lands, the cabinet is connected and commissioned.
1
day on site
3
person crew
0
wet trades
06 — WHERE WE DIFFER
Four things we will not tell you.
A premium product should be able to survive an honest description. These are the claims we have decided not to make, and the reasons why.
-
01
That you will be energy independent
In Vilnius the worst month is 8% of the best. Filling an 80 kWh battery from December sunlight alone would take seventeen days. North of the Alps this product cuts bills, charges cars and earns from the grid — it does not disconnect you.
-
02
That the biggest battery is the best battery
Past roughly 40 kWh, each extra kilowatt-hour returns €7–18 a year against a price of €271. We will recommend 40 kWh in most markets and tell you plainly when 80 or 120 is being bought for resilience rather than return.
-
03
That it pays back quickly in the Gulf
Electricity in Doha costs 3.2 cents. The arithmetic gives a 64-year payback. In the Gulf this is a shade structure with an exceptional specification, and that is how we sell it.
-
04
That grid trading is guaranteed income
Wholesale spreads exist because flexibility is scarce, and they will narrow as batteries multiply. We size the case so that it still works on self-consumption and resilience alone, and treat trading as the accelerant it is.
08 — CONFIGURE
Choose the structure, the storage and the finish, and see the figures for your own city rather than a national average.
Reference — Signature, 40 kWh