Why Small-Scale Solar Matters More Than Ever
Solar power usually gets talked about in two extremes — massive utility-scale solar farms or small rooftop systems. But what often gets overlooked is how small-scale, behind-the-meter (BTM) solar quietly delivers some of the biggest real-world benefits for homes, businesses, and the grid itself.
According to research led by Stanford University engineering professor Mark Jacobson, distributed solar — especially behind-the-meter installations — plays a critical role in building a resilient, affordable, and cleaner energy system.
Utility-Scale vs Distributed Solar
Solar projects generally fall into two categories:
Utility-scale solar: Large ground-mounted systems connected directly to transmission lines, supplying electricity to the grid.
Distributed solar: Smaller systems (typically under 20 MW) installed close to where power is used — on rooftops, car parks, warehouses, factories, and commercial buildings.
Distributed solar can be:
Front-of-the-meter (FOM) – connected to distribution lines and operating like small power plants.
Behind-the-meter (BTM) – installed on-site, supplying power directly to a building before the grid is used.
BTM systems may export excess power to the grid or draw electricity when needed, but their biggest strength is that they reduce dependence on grid electricity at the source.
Why Behind-the-Meter Solar Benefits Everyone
Utilities often argue that BTM solar reduces electricity demand and shifts grid costs onto other customers. However, this argument ignores how fast electricity demand is actually growing due to electrification of transport, buildings, and industry.
Jacobson’s research highlights several reasons why BTM solar strengthens—not weakens—the energy system:
1. Electricity demand is rising, not shrinking
Even with strong rooftop solar adoption, total electricity demand is expected to grow significantly. BTM solar offsets future demand rather than reducing the need for grid infrastructure.
2. No additional land required
Rooftop and on-site solar uses existing structures, avoiding land clearing and habitat damage common with large ground-mounted projects.
3. Reduced transmission and distribution costs
BTM solar supplies power directly to buildings, lowering the need for long-distance power lines that are expensive to build and maintain.
4. Stronger grid support during peak demand
When paired with batteries, BTM systems can export power during peak hours, helping prevent blackouts — especially during hot afternoons when air-conditioning loads surge.
5. Lower wildfire and safety risks
Transmission lines have been linked to devastating wildfires in multiple regions globally. Reducing reliance on long-distance transmission lowers these risks and associated costs.
6. Cleaner air and better public health
By reducing fossil fuel generation, BTM solar cuts harmful air pollution — delivering health benefits, especially to communities located near power plants.
7. Reduced climate impact
Lower greenhouse gas emissions mean reduced climate-related damage, benefiting all electricity users.
8. Improved energy security
Less dependence on imported fuels means greater resilience against price shocks and supply disruptions.
9. More local jobs
Small-scale solar creates more installation, maintenance, and electrical jobs per megawatt than large utility-scale projects.
10. Natural building cooling
Rooftop solar absorbs sunlight that would otherwise heat buildings, reducing cooling demand during peak hours when electricity prices are highest.
Additional Benefits for Solar Owners
For homeowners and businesses, behind-the-meter solar offers even more advantages:
Power during outages when paired with battery storage
Lower electricity costs by avoiding retail tariffs
Easier electrification of appliances, EVs, and heating without higher utility bills
The Big Picture
The global energy transition will require both utility-scale and distributed solar. But policy, pricing, and planning must support behind-the-meter systems — not restrict them.
BTM solar isn’t a threat to the grid. It’s one of the smartest tools we have to make the grid stronger, cleaner, and more affordable.
