E3G INGENIERIA Y ENERGIA, SOCIEDADLIMITADA

Their core work

E3G Ingeniería y Energía is a Spanish engineering SME based in Lleida that specializes in solar thermal energy systems for residential and small commercial buildings. Their work covers the full range from integrated micro-scale solar heat and power generation to advanced sorption-based seasonal thermal storage. They contribute engineering and system integration expertise to R&D consortia, helping translate laboratory-scale innovations into building-applicable heating solutions. Their practical focus is on increasing the compactness and efficiency of solar heating systems capable of delivering both space heating and domestic hot water from a single installation.

What they specialise in

How they've shifted over time

In their first H2020 project (Innova MicroSolar, 2016), E3G worked at the system level — combining space heating, domestic hot water supply, and on-site electricity generation into a single micro solar installation for homes and small businesses. Their second project (SWS-HEATING, 2018) marks a clear shift toward specialised component and materials technology: sorbent materials, multi-modular sorption seasonal storage units, and heat exchanger design take centre stage, with no further mention of electricity generation. This trajectory suggests E3G is narrowing toward advanced thermal storage chemistry and compact solar collector systems rather than broadening into power generation.

E3G is deepening into sorption material-based seasonal heat storage, making them a relevant partner for near-zero energy building projects that need compact, high-density thermal storage integrated with solar collectors.

How they like to work

E3G has participated as a consortium partner in both of their H2020 projects and has never served as coordinator, indicating they operate as a technical contributor rather than a project manager. Their two projects collectively involved 20 distinct partners across 7 countries — roughly 10 partners per project — which is typical for competitive RIA consortia and suggests they are comfortable in complex multi-national teams. Organisations should expect focused engineering input and practical system expertise from E3G, not administrative leadership or work package coordination.

E3G has built connections with 20 unique partners across 7 European countries through just two projects, indicating solid integration into European solar energy and building technology research networks. Their partnerships are spread internationally rather than concentrated in Spain, reflecting a genuinely European collaboration profile.

What sets them apart

E3G is a small Spanish engineering firm that combines hands-on solar system integration experience with emerging expertise in sorption-based seasonal storage — a combination rarely found outside university labs or large industrial players. Their base in Lleida, one of Spain's highest-solar-irradiance regions, gives them practical grounding in real-world solar thermal performance that lab-heavy partners often lack. For consortium builders in the building energy or solar heating space, E3G offers the SME engineering perspective and implementation-oriented knowledge that strengthens the applicability dimension of any RIA proposal.

Highlights from their portfolio

• SWS-HEATING
  Their largest funded project (EUR 243,750) and technically most specialised work, introducing a novel selective-water-sorbent seasonal storage unit — a materials-level innovation with direct commercial potential for solar-active buildings.
• Innova MicroSolar
  An earlier, broader-scope project targeting integrated micro solar heat and power for domestic buildings, demonstrating E3G's ability to work across heating, hot water, and electricity generation within a single compact system.