Renewable energy software development for batteries and solar

Zeronest sells an energy management platform for PV and battery installations. We build its software and support it under an SLA. We built the EMS behind Skyfri's platform for solar and battery plants, and for Global Green we are building an EMS for battery storage. On the market side, Enerace's procurement platform is ours too.

Earlier projects include the SCADA-based digital twin for KYOTO Group's thermal energy storage and software for Nuvve's vehicle-to-grid platform.

An EMS (energy management system) decides what each battery and inverter does, within the battery's state of charge, the site's grid connection limit and the market, across hardware from several manufacturers. We build EMS for solar installations and batteries.

• Zeronest, prosumer storage. The Zeronest EMS integrates 16 inverter brands and controls 30 MWh of storage.
• Skyfri, solar and battery plants. The EMS ran across 7 plants, with more than 5 MWh of storage and more than 4 MW of battery power.
• Global Green, battery storage. The EMS we are building covers 15 MWh of battery storage. Its orchestrator combines setpoints from trading, aFRR and direct control, resolves conflicts between them and only then splits the result across the batteries.

We build energy trading platforms for three groups: asset operators that bid flexibility into markets, advisors who tell their clients when to buy, and energy companies whose business customers buy energy through a portal.

What we build into energy trading software

• Portfolio position. The platform calculates each client's position from the contracts entered. At Enerace this replaced calculations in spreadsheets.
• Tranche purchasing. Tranches are entered in MW or MWh and converted to a percentage of the contract volume. A tranche can also be priced at the average quotation of a chosen product over a date range, and the platform updates that average every day until the end date.
• Market data. Price feeds and exchange data, including ENTSO-E Transparency for cross-border price and generation data, and forecasts of day-ahead and intraday prices.
• Decisions on record. Consultants issue purchase recommendations with a rationale, the client accepts them in the platform, and every decision stays in the history.
• Back office. Connections to billing and ERP systems, a module for comparing supplier offers in tenders, and invoice control that checks invoices against distribution operator data.
• ETRM integration. Since mid-2026 we have been building a purchasing portal for the business customers of an energy company, connected to its ETRM and accounting system. The ETRM API client was finished in September 2026. We are now building the tranche flow: a customer places an order, a trader accepts it and the trade is written to the ETRM. If the trader cancels it after the customer has confirmed, it is withdrawn from the ETRM.

What the software has to handle in 2026

Since delivery day October 1, 2025, the European day-ahead market has used a 15-minute market time unit (MTU): 96 trading periods a day instead of 24. Prices, bids, positions and settlement all have to work at that resolution, from the database to the screen.

REMIT II, Regulation (EU) 2024/1106 on wholesale energy market integrity and transparency, has been in force since May 7, 2024 and shortened reporting deadlines. Reports have to come straight from trade data, so every trade a platform creates needs a complete record and an audit trail of who changed what and when.

Trading companies usually keep an ETRM as the book of record for position, risk, P&L and settlement. A new trading tool or client portal has to work alongside it: each trade is written there once, and trading rules are read from it instead of being copied into new code.

Proof: Enerace

Since 2020 we have built Enerace.Online for Enerace, an advisory that helps companies buy electricity and gas. Automating market data collection and recurring reports saves hundreds of hours each month, and the SaaS model has brought Enerace new clients. Its production module, PowerShift, has settled in 15-minute periods since May 18, 2026. Background: how energy trading platforms work.

Between January 2022 and December 2023 we worked on Nuvve's vehicle-to-grid platform. We automated the monthly reports for Nuvve's customers, built a tool for monitoring and bidding on the Danish energy market, and built a database that joins charger, fleet and grid data. We integrated new charger models with the platform. In 2023 we rebuilt Fleetbox, Nuvve's EV fleet management app, for web, iOS and Android. It covers charging and market participation, including discharging to the grid.

Projects in Poland run under local rules. They include capacity-market auctions, the balancing products of PSE (the Polish transmission system operator), dynamic tariffs and demand-side response programs for battery storage (BESS) and flexible loads.

Since April 3, 2026 the rules also include the amended act on the national cybersecurity system (KSC), Poland's transposition of NIS2, the EU directive on network and information security. Entities had to apply for entry in the register of essential and important entities by October 3, 2026 and must implement the new obligations by April 3, 2027. For most obligations, administrative fines can be imposed only after April 3, 2028. Under NIS2, the maximum fine for essential entities must be at least EUR 10 million or 2% of worldwide annual turnover, whichever is higher. For a project under these rules the deployment choice matters: the control layer can run on-premises, inside your own infrastructure.