Energy assets: solar, EV charging, heating and district energy

Equipment that produces, stores or consumes energy in its own right — and why connecting it matters more for your power peaks than for your kWh total.

Solar panels, chargers and heating plant each behave differently from ordinary building load, and each distorts the total in a way that is hard to interpret if you only have the main meter.

Solar makes the building look like it is using less than it is. Charging adds a load that has nothing to do with the building's operation and everything to do with when people plug in. District heating is billed on a separate basis entirely. Connecting each of them separately is what lets you see the building's own consumption for what it is.

Solar production

SolarEdge — production from a SolarEdge installation.

SundayOS — production from installations managed on the SundayOS platform.

What you get: production alongside consumption, which is the only way to see how much of what you generate you actually use yourself rather than export. It also tells you whether the array is performing: a panel string that has dropped out is invisible on an electricity bill and obvious on a production curve compared against irradiance and last year.

What is needed from you: access to the supplier's monitoring account for the installation.

EV charging

Zaptec — chargers, their status and the energy each one delivers, read continuously rather than in daily summaries.

Why it matters: charging is usually the fastest-growing load in an existing building, and it arrives in bursts. If your grid tariff has a capacity component, a row of chargers all starting at 16:00 can set the month's peak on its own — and on the main meter that looks like an unexplained spike in building consumption. Read separately, it is obvious what it was.

Load balancing between chargers is handled inside the charging installation itself. Properate reads the result, so you can see what the balancing actually did and whether the capacity limit is set where you think it is.

Heating and cooling

Celsio — district heating and cooling. Readings are delivered through a queue that Properate confirms as it collects, so nothing is lost if collection is interrupted for a while.

Ebeco — underfloor heating. This one both reads and writes: setpoints can be changed from Properate, which makes floor heating schedulable along with everything else instead of being adjusted room by room.

Reading the whole picture

Once these are connected, Properate arranges them into the building's energy hierarchy so that production, charging and heating are understood as parts of the total rather than as separate numbers to reconcile by hand. Energy flow shows where energy comes from and where it ends up, which is the view that makes a solar-plus-charging building comprehensible.

This also matters for reporting. A building with significant self-consumption and a building that simply buys less electricity look identical on a purchase figure alone, and they are not the same thing — for certifications, for tenant billing, or for judging whether an investment paid off.

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