Apparatus manually configurable from a portable unit configuration into an assembled configuration provides a rigid shelter including a solar powered electricity supply circuit. The rigid shelter including the solar powered electrical supply circuit is manually configurable into reusable disassembled parts. Wall elements are releasably connectable between a base element and a roof element. Corner elements are used to define a unit. A plurality of units may be arranged as a single storey shelter or as a multi-storey shelter. External shelter elements have solar energy collector cells that may form part of an external element. A shipping container arrangement includes a plurality of stacked portable unit configurations.