1 Answer

Square feet and Watts - how it works?

A rough calculation is that 100 watts of AC peak power require 12 square feet of roof space - or 1 KW requires 120 square feet

How much will a PV system cost for my 2000 square foot home?

The cost of a PV system is not directly related to the square footage of a building. It actually depends on how much energy (kWh) you use per day and your location as well as how much sunlight you get.

How long do the solar modules and batteries typically last?

Most solar modules have a 20-25 year output warranty, but should last even longer since there are no moving parts. The average life of a battery depends on several factors; grade of battery (inexpensive golf cart to expensive industrial 2V cells), depth of discharge, number of cycles, temperature of battery and maintenance. To get the most out of your batteries, you should try to maintain them as close to 75° F as is practical and keep a good state of charge on your batteries while minimizing the number of deep discharge cycles. Also, an equalization charge (controlled overcharge) should be performed every 3 months or so followed by a replenishment of electrolytes. Electrolytes can be distilled water or gel based, depending on battery type.

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