What is the fine-grained topic of the following text: We have continued to work with SolX Energy building a further 6 locations resulting in similar benefits in efficiencies and now embarking on a review of older aged existing sites and where investment in new refrigeration and air-conditioning is required we will continue to work with SolX Energy as our partners. Only return the topic.
Partnership and continued work with SolX Energy for refrigeration and air-conditioning improvements at multiple locations.