The cost of photovoltaic solar panels is expected to drop to 36 cents per watt by 2017, according to new research by clean tech market research firm GTM Research.
Currently, solar panels are backed up by natural gas and various other types of power plants on the electricity grid. However, solar panel costs of $0.36 per watt make it more feasible to install additional solar panels to back each other up instead of using any other type of power plant (for off-grid setups), reducing the need for batteries.
For example, if you need 1,000 watts of power, and your 1,000 watt solar panel generates only generates 50 per cent of its capacity (500 watts) due to cloudy weather, that can be compensated for by using two of those 1,000 watt panels instead of one, so you could still draw 1,000 watts from that 2,000 watt (nameplate capacity) array.
As long as the solar panel array is generating more current than is being drawn from it, there is no power disruption or power fluctuation (provided that voltage regulation is used).
Each 1,000 watt panel would cost $360 without factoring in installation costs, but they would last about six times longer than batteries.
Assuming the batteries required are charged at their recommended rate, they would end up costing $1,980 and they would have to be replaced more frequently than the extra solar panel – plus, there is an installation fee for the batteries as well, except for DIY people.
Suddenly, that $360 sounds good. Even after factoring in the fees required to install that extra panel, it is likely still much cheaper than expensive batteries.
Anyway, we can’t be certain about anything yet. We will have to wait and see. And these are simply market projections.
“Yesterday’s PV cost reduction roadmaps are no longer relevant today,” said Shyam Mehta, Senior Analyst at GTM Research and the report’s author.
“Three or four years ago, the industry was targeting one dollar per watt costs in 2013; today we are at 50 cents per watt, and there is currently little consensus on what is a realistic goal for the module supply chain to set for itself over the next three to five years. This is not only important for these manufacturers and their investors, but for installers and project developers across the globe.”