Abstract: There is provided a bracket, comprising: a first portion configured to hold a first solar panel connector of a first solar panel module; a second portion configured to provide a guide along the length of the second portion for a second solar panel connector of a second solar panel module, the first and second portions being configured so that, when first and second solar panel connectors are connected to the bracket, the first and second solar panel modules protrude away from the bracket in different directions; and a third portion connected to said first and second portions and configured for attachment to a roof structure.

Abstract: There is provided a bracket, comprising: a first portion configured to hold a first solar panel connector of a first solar panel module; a second portion configured to provide a guide along the length of the second portion for a second solar panel connector of a second solar panel module, the first and second portions being configured so that, when first and second solar panel connectors are connected to the bracket, the first and second solar panel modules protrude away from the bracket in different directions; and a third portion connected to said first and second portions and configured for attachment to a roof structure.

Abstract: A method of, and a system for promoting the flow of air from a lower location to an upper location, the method comprising: using heat from a heat source to provide a first heat store; and making a secondary use of heat from said heat source to power a heating device for heating an air conduit connecting said lower and upper locations; wherein said secondary use of heat from said heat source is controlled on the basis of an indicator of whether or not there is an excess of heat in the heat store.