It's fast to install - can be done by one person who has basic mechanical skills! Very powerful capacity at very low weight/size ratio compared other solutions available today; it also offers great flexibility due its modularity which allows you have multiple options according your needings or budgeting capabilities etc.; no maintenance required as long time after installation if properly installed ; easy communication between customer service agent from EDF Energy when needed support during deployment process : good experience so far! nothing really but would like an option that could hold more than 1000 kwh without any modification / upgrade cost since we will not use this feature right now.