Resources
Tools to run your numbers and analysis to decide with judgement, made by the engineers who then install, file and monitor.
Tools
Tool
Savings calculator
Work out what your roof could deliver with the area's real solar data.
Tool
Today's electricity price
Today's wholesale price, hour by hour, and the cheapest hours of the day.
Tool
Surplus tariffs
What each supplier pays for your surplus energy, sourced and dated.
Tool
Rebates by municipality
What each local council rebates, town by town, with its by-law.
Tool
Understand your bill
What you really pay in each block of the bill and which part you can cut.
Tool
Grants and deductions 2026
What genuinely exists this year, what no longer does, and the certificates that lock it in.
In-depth guides
The three reads that settle the most doubts, start to finish.
Guide · 6 min
A solar installation's paperwork, step by step
From the technical report to the energy certificate: the complete paperwork of a self-consumption installation, step by step, and what to keep at each stage.
Guide · 8 min
Your consumption curve: the data nobody taught you to read
Your smart meter already records consumption hour by hour. Learn to read your curve and size your solar system, orientation and battery with real data.
Guide · 4 min
Solar tax rebates across La Costera and nearby, 2026
A comparison of IBI and ICIO tax rebates for residential solar across La Costera and neighbouring comarcas, with the source by-law for each figure.
Latest analysis
17 Aug · 8 min
How much contracted power do you need with solar panels
17 Aug · 6 min
Solar panels, home insurance and your house's value
17 Aug · 7 min
Solar self-consumption myths: fact and fiction
17 Aug · 7 min
Battery ready solar: what it really means
17 Aug · 6 min
Winter solar output: what a La Costera roof produces
17 Aug · 7 min