The challenge
Capacity charges and peak-period consumption accounted for 46 % of the plant's electricity bill. Two press lines created demand spikes that set the billed maximum for the entire year.
Precision components manufacturer · Zaragoza, Spain · 2024
Cutting a factory's capacity charge in half
1.6 MWp of rooftop generation plus 2.4 MWh of storage, engineered around a punishing peak-demand tariff.
Engineering design
1.6 MWp across four roof areas, a 2.4 MWh LFP storage system dispatched against a real-time demand controller, harmonic filtering on the drive network and power-factor correction at the main switchboard.
Installation
Seven months with zero production downtime; all switchboard works performed during planned August shutdown.
“They modelled the saving to within three percent of what we actually achieved in year one.”
Measured results
52 %
capacity charge reduction
€412k
annual saving
4.1 yr
payback
780 t
CO₂ avoided per year
Production versus consumption
Monthly kWh, first full operating year.
Let's engineer your energy system.
Send us a year of electricity bills and a photo of your roof. We return a full engineering proposal with modelled production, savings and payback.