Guides

How-tos, primers and deep-dives on residential solar in Spain — sizing, equipment choice, paperwork.

Off-grid solar in Spain: what a campo house really needs

An installer’s guide to off-grid solar for rural Spanish property: when it genuinely beats paying for a grid connection and when it does not, why the battery sizes the system, what a well pump does to the inverter, and what paperwork is left once there is no grid.

Aug 22, 2026

Solar water heating in Spain: siting, tax relief and what actually fails

A guide for people who own a home in Spain: where the tank has to go, what a comunidad de propietarios changes, which town halls bonify the IBI for solar thermal (and which give nothing), and what the system asks of you over fifteen years.

Aug 22, 2026

Solar water heaters explained: how thermosiphon systems work (2026 guide)

How solar water heaters work — thermosiphon flow, evacuated tubes, and heat pipes — plus the system types and how they compare with gas and electricity.

Jun 5, 2026

How to choose a solar battery: low-voltage vs high-voltage (2026 guide)

Low-voltage or high-voltage? The choice that quietly decides how much power your home can draw, where the battery can go, and how big it can grow. A plain-English guide, a 5-step way to choose, and how our APX, AURA, AXE and HOPE batteries compare.

May 31, 2026

Single-phase or three-phase? 6 ways to tell at home (2026 guide)

Six honest ways to figure out whether your home is single-phase or three-phase — from the most reliable (look at your main breaker) to the easiest (ask your distributor). Plus a free analyzer that reads it from your electricity bill in ten seconds.

May 27, 2026

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