Mitsui led a $16.8m round for the green energy and clean energy product supplier, investing together with undisclosed existing backers.

UK-based renewable energy retailer Tonik Energy has received £13m ($16.8m) in a funding round led by a £10m investment from diversified conglomerate Mitsui & Co.

The round also featured undisclosed existing investors, and impact investment bank ClearlySo advised Tonik on the round. The company has not revealed details of any earlier funding.

Founded in 2015, Tonik supplies electricity that has been sourced from a carbon neutral, renewable source to a customer base of about 100,000 households, to help them offset…