Halide Energy Secures Funding to Revolutionise Grid-Scale Battery Storage

Editorial Team

Last updated 24-12-2025

3 min

Halide Energy, a Finnish startup, has attracted investment from BSV Ventures and LAB7.

They focus on copper-based redox flow batteries for cost-effective grid-scale energy storage.

The collaboration aims to accelerate product development for a lower-carbon energy sector.

LAB7 identifies grid storage as crucial for renewable energy integration.

With market interest growing, scaling up remains a challenging task for Halide Energy.

Halide Energy, a young Finnish startup working on long‑duration batteries, has caught the attention of two major backers: BSV Ventures and LAB7, the venture-building arm linked to Aramco. The pair have stepped in for the first close of Halide’s latest investment round, aiming to push forward a new generation of redox flow batteries designed for grid‑scale storage. And believe it or not, this sort of thing is becoming crucial as more countries try to squeeze renewables into their energy mix without causing the lights to flicker.

The challenge is pretty simple on paper but a bit of a faff in real life: solar and wind don’t behave. They come and go, and grids need something steady to balance out the wobble. Halide Energy claims its copper‑based redox flow systems can help by offering long-duration storage without the hefty costs or complicated maintenance that usually hang over this type of technology. The team uses abundant copper in an aqueous electrolyte, which, from what I gather, keeps the whole system cheaper and safer than many alternatives.

LAB7 says the collaboration is meant to fast‑track a market-ready product and set the Finnish startup up for growth. It fits neatly with LAB7’s focus on technologies that could support a lower‑carbon energy sector. I remember chatting with founders at a small energy meetup organised by Arageek a while back, and one of them joked that grid storage is the “unsexy hero” of the clean-energy transition. Spot on, really. Without solid storage, renewables hit a ceiling quite fast.

Halide Energy itself only came onto the scene in 2025, positioning its copper flow batteries for both grid and industrial users who need reliable, modular storage. The company frames its tech as a way to accelerate renewable adoption while keeping systems resilient—big promises, of course, but I reckon the interest from investors shows there’s real appetite for new approaches. On the flip side, long-duration storage is a tough market, and competition is heating up, so scaling won’t be a walk in the park.

Still, BSV Ventures and LAB7 seem chuffed to bits with the partnership, and the startup now has a clearer path toward bringing its solution to market. If Halide manages to hit its targets, it could help ease one of the energy sector’s most stubborn bottlenecks. And well… I mean, anything that makes the energy transition less of a slog is welcome, you know? It’s definately one to watch as the push for more reliable renewable power continues.

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