OX2 Signs 3 GWh Battery Supply Framework With Trina Storage

The company said the agreement covers projects in Finland, Sweden, Poland and Italy that are expected to reach financial close in 2026 and 2027, according to reNEWS. Most of them are scheduled to become operational in 2028. Solarbytes, which also covered the deal, reported that OX2 has not disclosed individual project capacities, locations or the financial value of the agreement. Trina Storage is the energy storage business of Trina Solar, and OX2 chief operating officer Paolo Romanacci called Trina Solar a long-term partner for the company's pipeline across Europe.

Why it matters

The figures give a ceiling, not a delivery schedule. Until projects reach financial close, OX2 can size, delay or drop individual sites, and no power rating, duration or grid connection has been published for any of them. What the deal does show is supply terms being set before those investment decisions are taken.

For scale, the 3 GWh is a pipeline figure and not a measure of installed capacity. It is about 1.9 times the 1.6 GWh Stadorf battery that Elements Green Deutschland took through a TenneT grid-connection agreement on Nov. 10, as Voltgrid reported, but that comparison is only about size: Stadorf is a single site, while the OX2 framework spans four countries and an unstated number of projects.

What OX2 and Trina have already done together

The two companies have worked together before. On July 9, 2026, Trina Storage agreed to supply the 50 MW / 209 MWh Fageråsen battery in Sweden, OX2's third utility-scale storage project awarded to Trina after Kannisto and Korkeamaa in Finland, Renewable Energy Magazine reported. Together those three projects are about 680 MWh. That July order was a project contract with deliveries planned from the first quarter of 2027; the new framework is a separate and much larger agreement, and neither report says that Fageråsen counts toward the 3 GWh.

Measured against those three projects, the framework is roughly 4.4 times their combined 680 MWh. The two figures are not like for like, because one is awarded projects and the other is a pipeline allowance, but it shows how far the relationship is meant to stretch.

What is not confirmed yet

Neither report gives a contract value, a split by country, power ratings, battery chemistry or the number of projects. It is also not stated whether the framework fixes prices or volumes, or whether OX2 is committed to buy any minimum amount from Trina Storage. Each project would still need its own financial close. OX2's own release was not available to Voltgrid at the time of writing, so the figures above come from the two outlets named. Watch for the first project-level order under the framework, which would be the first firm sign that part of the 3 GWh is being bought.