Our Grid-tie user packages are designed to connect to National Grid, using the Wren set up as a means of lowering your energy bills. The Wren Grid-Tie User Package consists of Wren, Building or Tower kit, Windmaster 500 GTI, Run/Stop switch box and fuse, 10m 2.5mm2 cable, 6.5mm & 13mm drill bit. Confirm 12 or 24v and tower option. The delivery cost for this item is included in the price. If you require any further information on wind turbines and their uses, please click the link below.