kWise
Import metering data
Read in your grid operator's load profile data via drag & drop or automatically by email import – in the official ValidatedMeteredData XML format.
Swiss software for vZEV
Share solar power. Settle it fairly.
kWise manages your virtual self-consumption community (vZEV) end to end: import metering data, distribute PV power in 15-minute intervals, send invoices with Swiss QR payment parts and keep audit-proof accounts – open source and built for Swiss regulation.
≤ 15 minload profile resolution
4languages DE · FR · IT · EN
MITopen-source licensed
PDF/AQR-bill invoices
How it works
From meter reading to finished invoice in four steps
From your grid operator's smart meter export to the booked payment: kWise covers the entire workflow of running a vZEV.
Distribute solar power
kWise allocates PV production to the participants in 15-minute intervals: self-consumption, surplus and grid supply at a glance.
Send invoices
Invoice runs at any interval you choose – with Swiss QR-bill, PDF/A compliant, sent directly by email.
Keep the books
Payments, costs and budget under control – all the way to the annual closing with balance sheet and income statement.
Core features
Everything a vZEV needs – in one place
From metering data delivery to the annual closing: kWise covers the complete workflow of vZEV management.
Energy data import
Load profile data via drag & drop or email import – in the ValidatedMeteredData format (1.5/1.6), at 15-minute resolution.
PV power distribution
Automatic allocation of PV production to all consumers: self-consumption, surplus and residual grid supply at a glance.
Consumption analysis
Analyse consumption, PV production and grid supply interactively – with time filtering and clear visualisations.
Invoicing
Invoice runs at freely definable intervals – including Swiss QR-bill (PDF/A) and dispatch by email.
Accounting & cost allocation
Audit-proof double-entry bookkeeping with a gapless numbered journal, budgeting and annual closing – also suitable for generation cooperatives and condominium owners' associations.
Participant portal
Login for vZEV participants with access to consumption data, invoices and documents – multilingual, with dark mode.
Operating costs & payments on account
Operating cost statements per financial year and payment-on-account plans generated straight from the budget.
Document management
Upload statements and receipts, publish them selectively to participants and deliver them by email.
Tariff management
Peak and off-peak tariffs, metering fees and PV discounts for day and night – flexible per period.
Swiss legal framework
What is a virtual self-consumption community?
Since 1 January 2025 the Swiss Energy Ordinance allows virtual self-consumption communities (vZEV): several properties – or the apartments of a single building – share one photovoltaic system at the same grid connection point, without new cabling, purely via 15-minute smart meter data.
- Single grid connection point (< 1 kV, no junction-sleeve network)
- PV production of at least 10 % of the total connected load
- 15-minute metering by smart meters
- Compliant, audit-proof billing – kWise takes care of that
Why kWise
Built for transparency and Swiss requirements
Open source
The source code is openly available under the MIT licence – full transparency, no vendor lock-in.
Self-hostable
kWise runs as a standalone Spring Boot application (Java 21, executable JAR) – on your own infrastructure or hosted by us.
Swiss law in focus
Developed along the Swiss Energy Ordinance (Art. 16a–16g EnV) – for compliant, audit-proof vZEV billing.
Multilingual
Interface and communication in German, French, Italian and English – just like your neighbourhood.
Open source
Get started now
kWise is fully open source and available under the MIT licence. Download the latest version, host it yourself or take a look at the source code.