4eco Ltd

4Eco – immerSUN is the UK’s leading designer and manufacturer of micro-generation energy controllers.

Our mission is to help homeowners and tenants save money, reduce energy bills, offset Fuel Poverty and protect the environment.

Having supplied tens of thousands of properties nationwide with effective sustainable solutions, we work with eco companies globally to increase the self-consumption of green energy.

Our market-leading range of energy controllers uses a patented British design and the latest eco technology to minimise reliance on mains supply. The immerSUN, used in conjunction with PV or any form of Micro-Generation helps offset Fuel Poverty by reducing energy cost heating both water and space.

Based in Binbrook, Lincolnshire, our team of experienced technical experts is on hand seven days a week to help out with any questions or queries.

4Eco – immerSUN is passionate about making a positive difference and creating a more sustainable future.


PV Energy Management, Water Heating, Space Heating and Solar Hot Water Systems

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Energy Saving Trust
Institute for Sustainability