Welcome to the latest edition of PV Tech Power. This is a special issue for a number of reasons. The journal has now been running for five years with a growing roster of industry experts sharing in-depth knowhow on everything from contract law to the pitfalls of east-west module layout. It’s also a special issue for us as it is the tightest marriage yet of PV Tech’s decade-plus of solar industry coverage and the expert analysis and reporting of our sister site Energy-Storage.News. Our 19-page special report in this issue explores both the accomplishments of the energy storage sector and the ongoing challenges. Fittingly, Andy Colthorpe, editor of Energy-Storage.News, sets the scene, and much more.