This calculator has been designed to show the cost of your grid connect power over a 20 year period. You can calculate this on an existing grid connection or a new connection that you may be considering. When comparing grid-connected power to an off-grid system, examine the warranty period of the system you're choosing, then compare it to the calculated grid power cost for the same duration. For example, if your off-grid system has a 5-year warranty, compare the grid power cost at the 5-year mark. If your off-grid system is less than this, then it is an easy decision to consider that off grid power would be a better financial decision.
Other factors may also influence your decision to switch to an off-grid solar system, but this comparison focuses on the cost difference between grid and off-grid power over time.
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