All stations require the deployment of the basic station assembly. To construct an Solar Power Plant, just bring the Power Plant Assembly to the desired location. Each station part is 1000m3, so a Cargo Ship will be required.
Jettison the assembly, move close to it and then click on it to deploy the assembly. A timer will begin to count down to indicate when the station construction will be completed.
Stations can also be crafted, adn will require various modules, including the Life Support Module, Hanger Bay, Power Plant, Communications Array and a Bank Vault.