15-minute price forecasting and bankable financial modelling for Romania, Bulgaria and Hungary. Every document carries a fingerprint the lender verifies alone. The engine's error is published monthly — including the months we get it wrong.
Price forecasting — RO, BG, HU live. Greece is published and sits below target: the figures are there, with the measured reason. Financial modelling — RO.
The 20-year price level is bought from Aurora, AleaSoft or Afry — we do not sell it, we import it and attribute it: provider, version, interval, extraction date, fingerprint.
Operational volume forecasting exists in Romania too. Price forecasting does not.
The document your bank reads is bought by the hour from a Big-4 firm — and cannot be verified after it is issued.
We do the second and the third, on the same engine, with the error published.
Every renewable investment comes down to the same three unknowns. Voltaraj was built to answer them — with numbers you can defend in a credit committee.
Probabilistic forecast of the day-ahead market at 15-minute resolution — 96 slots a day, with calibrated P10/P50/P90 bands, for tomorrow and the day after.
Two engines: a machine-learning model for plants with production history, and a physics engine for any greenfield site — from coordinates, tilt, azimuth, trackers, bifaciality.
A full financial model: DSCR, project and equity IRR, NPV, payback, tornado sensitivities — for PV, storage, or hybrid projects.
Most forecasts give you one line and hope. Voltaraj gives you a calibrated interval: the P10–P90 band is calibrated to a coverage target, and the rate it actually achieves is published monthly — including the months it falls short — so you can plan for the bad day, not just the average one.
No production history? No problem. The physics engine computes hourly output from first principles — solar geometry, irradiance decomposition, panel temperature, trackers with backtracking, bifacial gain, inverter clipping. Got a bankable yield report? Voltaraj calibrates to it and matches its annual figure.
One engine for PV, storage, or hybrid: P&L, debt schedule with grace period and cash-sweep, minimum and average DSCR, project and equity IRR, NPV, payback, EBITDA margin. Plus a tornado chart showing which variable actually moves your NPV — so you know where to negotiate.
Every analysis exports as a formatted HTML report and a structured Excel workbook — in English and Romanian — with charts, assumptions, and the "where does 100 RON go" waterfall. Built to be read by a credit analyst, not just an engineer.
Forecasting is a probability business. Anyone selling you certainty is selling you a story. Here is exactly where our numbers stand — and where they don't.
Good enough to compare sites and kill bad projects early. For a figure you take to a bank, we calibrate against a formal yield report — and then we match it to ~1% on specific yield. Screening and bankability are different jobs; we tell you which one you're getting.
When it is, Voltaraj doesn't forecast blind — a source gate automatically switches to the weather-driven model. It's designed behaviour, and the report tells you which source was used. No silent degradation.
Our battery models use ~85% round-trip efficiency and a ~70% capture factor versus perfect hindsight — and a cycle only runs if the forecast spread beats the wear cost. Optimistic spreadsheets are how storage projects die.
The trading planner produces dispatch schedules, bid curves and aFRR thresholds as decision support. It does not place orders, and we don't claim it replaces your trader — it makes them faster and harder to surprise.
Forecasts on coupled markets are natively in euro. If you want the figure in local currency, we convert P50 and declare the rate, the date and the source — the local central bank, not a cross rate. The P10–P90 band stays in euro: that is where coverage is measured, and an interval multiplied by a spot rate no longer covers at the same rate in the other currency. By how much less depends on the currency’s volatility — and we have not measured it, so we do not claim it.
Project-finance desks can run Voltaraj entirely inside their own perimeter. The financial engine receives configuration objects and revenue figures, and returns DSCR / IRR / NPV — it never sees your client data, and your data never leaves the building.
The computation engine is stateless and session-safe — no shared global state, no cross-contamination between analyses, no access to the raw market-data warehouse.
TLS everywhere, bcrypt password hashing, TOTP two-factor authentication, HMAC-signed webhooks, Bearer-key API access, and a firewall that exposes exactly three ports.
Annual on-prem licence with support, model updates, and training for your credit analysts. Book a call →