Being more efficient on the use of power in your home could ultimately lead to you choosing a smaller solar system and therefore saving you money. There are several ways you can reduce the electricity demand in your home. Some easy, cost effective measures include: installing energy efficient light bulbs, low flow shower heads and faucet heads, and properly insulating your hot water tank. Further, more expensive measures include upgrading to 6-star energy-rated appliances, replacing your windows with double-pane glass and possibly replacing your house insulation. You can also install solar water heaters or hot water heat pumps to further reduce your energy demand.