Not only are the forms of hardware within the renewable energy category diverse and heterogeneous, but they can be implemented at markedly different material sizes1 – in terms of both physical form and energy generating capacity. This is illustrated in Table 1, which, for five forms of renewable energy, distinguishes between macro, meso, micro and pico sizes of implementation. This ‘hypersizeability’ is a distinctive characteristic of renewable energy hardwares not as readily realised by other energy technologies; commonplace nuclear reactors remain a fantasy of the 1950s. Each of these hardwares, when implemented at different sizes, has different relational qualities of physical presence, connection to other physical infrastructure (buildings in particular), degrees of mobility and potential for environmental impact and disturbance. These qualities, as we shall discuss later, are also implicated in various ways in the forms of social relation between technology and publics.