Deciding System Size

Electricity consumption varies from house to house, depending on the efficiency of its appliances, the number of people living there and their habits and practices. The size of the home matters far less.

Even though prices of solar electric systems have dropped substantially, it is still cost effective to replace aging and inefficient air conditioners, refrigerators and other equipment rather than spend money on a larger generating system.

How much of your power bill you want to eliminate is a critical decision, not only for calculating savings but also for determining the type of inverter and module best meet your needs. You should at least try to eliminate the more expensive rate tiers; you will save more money per dollar spent on the system. Rocky Mountain Power can provide you with your last two years’ consumption if you ask them as we describe in our contact form.

Often the maximum size of your solar electric system is determined by the space available on your roof. If your roof happens to be able to accomodate a system larger than you currently need, you may want to consider purchasing an electric car; the incremental cost per kW of a larger system is low. A Federal tax credit of $7,500 and Utah tax credit of $1,500 applies to the nearly two dozen all-electric vehiles available today. We can install the rapid charger as part of the solar installation. Several of our installations were sized with an electric car in mind; one customer already has an electric car and has yet to pay for any electricity from Rocky Mountain Power.

Utah Applied Solar Energy, LLC  2015