How much could your business save on electricity?

Send one year of your 15-minute consumption. Within 24 hours we tell you what lowers the bill, what it costs and how many years it takes to pay back. Free.

For businesses in mainland Portugal (MT, BTE) and Spain (3.0TD, 6.1TD).

Send my consumption

What we look at, in one example

Tariff option — The tariff cycle (Portugal) or contracted powers (Spain) that cost least. Here: the daily cycle, €460/year less, no investment.
Peak charges — What peak-hour and excess-power charges cost today, and what reduces them. Here: from €5,223 to €2,472/year.
Solar — The size that pays, not the largest that fits on the roof. Here: 52 kWp, €8,359/year less for €31–57k, paid back in 4–7 years.
Battery — Only if it pays, with real equipment prices. Here: €954/year less for €13k, over 13 years to pay back. Not recommended.

Illustrative example: public industrial load profile (189 MWh/year, 52 kW peak), Portuguese BTE tariff, Lisbon.

How it works

Download the last 12 months of 15-minute consumption: from the E-REDES Balcão Digital in Portugal, or from Datadis in Spain.
Send it with one recent invoice through the form below or to hello@kilowhy.com. If you like, add the roof area available and a quote to compare.
Within 24 hours you get a short report with the options: investment, yearly saving, payback years and 25-year value.

Send your consumption

How we calculate

Exact 2026 network tariffs (ERSE in Portugal, BOE in Spain), applied every 15 minutes.
Real OMIE market prices and PVGIS solar output for your location.
Installation costs from awarded public contracts, as a low–high range.
The battery runs on simple rules without predicting the future, so savings are not inflated.

FAQ

Is it really free?

Yes. We don't sell or install equipment, so we gain nothing if you buy more than you need.

What do I need to send?

The consumption export and one recent invoice. The invoice tells us the price you pay for energy, which changes the result a lot.

What happens to my data?

It is used only for your report and deleted on request.