Each site remains authoritative.
Fast decisions and safety limits stay at the site, even when an internet service is unavailable.
Built by Sourceful and contributors
Sourceful open source
Open infrastructure for distributed energy.
We publish the shared software behind the Grid Connection Platform. FTW is the open EMS at the centre, with a live web app, encrypted relay access, open device drivers, AI load prediction, optimisation and local safety control.
Sourceful focus
The Grid Connection Platform
Flagship project
FTW · Open EMS
Shared device layer
Open Lua drivers
Project model
Clear status and licences
01 · Why we work in the openShared foundationInspect · Run · Extend
Sourceful · Kalmar, SwedenThe common layer should not be rebuilt in private.
Why this work is public.
Energy sites need the same basic work: connect meters, batteries, inverters and chargers; normalize data; apply limits; and expose a safe control path.
If every installer, utility and manufacturer rebuilds those integrations behind closed doors, progress stays slow and each system remains tied to its own cloud.
We publish the common layer so others can inspect it, add hardware and run it. The same work strengthens the Grid Connection Platform and gives partner products a tested foundation.
Open code does not remove responsibility. Sourceful charges for the hosted platform, encrypted relay access, supported integrations, support and agreed operations.
Sourceful Open Source · Maintained with project contributors
One open layer works across brands.
Meters, batteries, inverters and chargers use a shared model instead of separate control plans.
Others can build on the system.
Installers, utilities, manufacturers and developers can inspect the code, add hardware and run FTW themselves.
Open infrastructure · Clear responsibilitySourceful · Open source · 01
02 · Flagship projectFTW · Open EMSWeb app · relay · drivers · optimisation
Local authority · Encrypted relay accessThe full energy site, planned and controlled as one.
FTW combines a live web app, end-to-end encrypted relay access, open hardware drivers, AI load prediction, solar forecasts, state-of-the-art long-horizon optimisation and local safety control. The optimiser proposes each plan; FTW Core checks and dispatches it.
Signals in
Meter and device telemetry
Prices and weather
Learned load and solar forecasts
FTWOn your hardware
01Connect mixed hardware through open Lua drivers
02Optimise price, load, solar, storage and charging
03Check every plan against local safety limits
04Control the site in real time with safe fallbacks
Coordinated out
Solar, batteries and inverters
EV charging and V2X
Web app, relay-based remote control and Home Assistant
An integrated EMS, not another device appSourceful · FTW · 02
03 · Projects and toolsTools people can useCode · Releases · Clear status
A selected set, not every repositoryThe useful parts are public too.
We open the code and tools that help people run FTW, add hardware, test devices or diagnose a site. Each project has a clear job.
Build with Sourceful01
Device Drivers
Public Lua source, package contracts and tests for meters, inverters, batteries and chargers.
LuaApache-2.0
Browse driversBeta02
Home Assistant Add-ons
The official beta add-on repository for installing and running Sourceful FTW with Home Assistant.
PythonApache-2.0
Open the add-onsTest without hardware03
Device Simulator
Run solar, battery, meter and EV charger profiles over Modbus TCP, MQTT and OCPP before real hardware arrives.
GoMIT
Run the simulatorDiagnose a site04
Modbus Debug
A read-only browser-based tool for finding a device, checking Modbus TCP and producing a report an installer can share.
GoMIT
Get the toolUse it now05
Negative Price Calculator
Analyze Swedish solar export against historical spot prices in the browser. Uploaded production files stay on the device.
TypeScript + PythonMIT
View sourceFrom the team06
mqtop
A fast MQTT and NATS terminal explorer by Fredrik Ahlgren. Useful for inspecting device and broker traffic while building an integration.
RustMIT
Open mqtopRun it · Test it · Add hardwareSourceful · Open source · 03
04 · Sourceful LabsEarly and independent workExplicit maturity · Public source
Not every project is an energy productSome projects start with one narrow problem.
Labs is where we show early systems work and separate tools without presenting them as part of Sourceful's commercial energy offer.
Alpha
FTWDB
An experimental embedded energy database for durable time-series work on small Linux devices. It is not presented as production-ready.
RustApache-2.0
Experimental
Hugin Agent
A small local helper for device discovery, read-only Modbus access and testing draft Lua drivers against hardware.
GoMIT
Independent project
Miranda
Passkey-native terminal continuity for persistent tmux sessions on machines you own. A separate project by Fredrik Ahlgren.
GoMIT
Early work, labelled as early workSourceful · Labs · 04
05 · The business boundaryOpen infrastructureOperated outcomes
Distribution and business modelThe Grid Connection Platform is the business. Open software extends it.
Sourceful builds the Grid Connection Platform. C&I batteries are the first commercial use because they can add controllable capacity quickly. FTW provides the shared device and control layer across sites and partner products. The code remains open; Sourceful charges for platform services, relay access, integration, support and agreed operations.
Open FTW
Local control and client code
Driver source, contracts and tests
Diagnostic and simulation tools
Reference methods and test cases
Partner platform
Supported integrations and signed software
Telemetry, forecasts and optimisation services
Fleet tools and remote operations
Branded web app, integration and support
Sourceful-operated
Site design, installation and integration
Safety, performance and recovery
Market participation and production services
Financing and agreed service levels
Next candidates
Open methods without publishing the production engine.
We are reviewing public reference methods for flexibility economics and a synthetic C&I Site Lab. The useful public layer is repeatable inputs, assumptions and test cases. Customer calibration, production dispatch and market operation stay with Sourceful.
Open code · Paid platform · Paid responsibilitySourceful · Open / Platform / Operated · 05
Two ways to start
Run FTW yourself. Use Sourceful for relay access, integration and operations.
FTW can run locally as an open EMS. Sourceful works with organisations that need hosted relay access, supported integrations, platform services or a defined operating scope.