The Seven Ways To Solve The Energy Problem

The Seven Ways To Solve The Energy Problem

Utility scale projects like giant solar farms in the desert and giant wind farms in the Midwest (or offshore) all face serious hurdles in siting, permitting, environmental impact, and transmission capability. Rooftop photovoltaic (PV) solar systems face no such issues and can be deployed right now, building capacity incrementally over time. PV has been proven in the field commercially for over 30 years and, speaking as a former residential and small commercial solar designer, I know that it can provide 50-100% of the needs of most small buildings.

Rooftop PV also has a capital advantage. Whereas utility-scale solar and wind projects need to secure large power purchase agreements in order to raise enormous amounts of capital that will be tied up for decades, small rooftop PV systems are purchased outright by the end-users, assisted by ratepayer-funded incentive systems. Simply getting projects done is considerably easier.

From a funding perspective, rooftop PV is arguably one of the easiest sources we can develop, and options are proliferating. Cities like Berkeley and San Jose are offering municipal bonds to finance local projects, which keeps the financing small, local, and low-risk. Third-party financing companies are springing up all over the country, making it possible for home and business owners to put solar on their roofs with no out-of-pocket expenses and pay them off at the same rates or less than they’re already paying to utilities, with nearly zero risk to all parties. End-users enjoy an additional benefit of having a known, fixed cost for their future power, even as fossil fuel prices skyrocket.

Another very important advantage is that rooftop PV is distributed, which contributes to the resiliency and robustness of the grid. In most modern neighborhoods, no grid upgrading is needed to support rooftop solar systems. More distributed power generation also means fewer points of failure: a cloud over here is compensated by clear sky one mile away. It also enables micro-islanding, which would allow most of the grid to stay up when there is an outage, instead of taking vast chunks of the country’s grid down along with it as we have seen in the recent past.

Utilities also win with rooftop PV, because it means they don’t have to spend an enormous amount of effort and money in search of enough clean, green kilowatt-hours to meet their renewable portfolio standards, nor spend it on beefing up their grids. It essentially costs utilities zero to take up energy produced this way; in fact it can be a net benefit to them because the homeowner ends up paying for the new smart meters they plan to deploy across their grids anyway (at a cost of tens of millions of dollars).

Feed-in tariffs (FiTs) that pay a premium for kilowatt-hours generated by rooftop PV have been employed with great and immediate success in Germany and Japan, to the point where both programs will be largely phased out within the first decade. Support for a national FiT in the US is still weak, but I believe it could become a reality if the public were educated about the success it has enjoyed elsewhere in the world.

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