April 05, 2021

Energy Innovation: Solar Energy Solutions Continue to Gain Momentum

By: Vicki Parsons - IT

From community solar installations to a push in some municipalities for all-electric building codes, interest in solar keeps \

By Eugene L. Meyer April 1, 2021

Proudly solar: Florida’s Babcock Ranch, “the most sustainable town in Florida.” | Photo: courtesy Babcock Ranch

Babcock Ranch is a sprawling master planned community on 18,000 acres on Florida’s West Coast, some 20 miles from Fort Myers, which prides itself on being “America’s first all-solar town.” Its marketing slogan is “We’re powered by the sun and energized by you.”

The power comes from 688,360 solar panels across 870 acres just north of town that provide electricity to the entire community. In development since 2006, Babcock Ranch was carved from 91,000 acres of wilderness of which 73,000 acres are now preserved under state control.

“The argument over what’s causing climate change doesn’t matter,” says Syd Kitson, president and CEO of Kitson & Partners, developers of Babcock Ranch. “Regardless of political or personal thoughts on it, [solar power is] the right thing to do, and Babcock Ranch is proving that.”

Notably, Babcock’s solar power is a cooperative venture with Florida Power & Light (FPL), the statewide utility that has historically relied on natural gas, coal, oil, and nuclear power to generate electricity for roughly 4.9 million accounts and 10 million people, but is increasingly harnessing sunshine as a source. With 18 major solar plants operating already, FPL has begun building 10 solar energy centers with a goal of 30 million panels installed and operating by 2030. This year, solar is outpacing coal and oil combined, as a percentage of the utility’s energy mix (FPL shut down its last coal-fired plant in January, and is currently dismantling its oil plants).

Community Solar a Growing Trend

Babcock Ranch, which takes its name from the family that owned the land for generations, represents a marked evolution from the world of individual rooftop solar panels. It also reflects growing national interest—if not quite yet a trend—toward all-electric homes and community-wide solar.

Solar trees at Florida’s Babcock Ranch, where sustainability is built into the infrastructure. | Photo: courtesy Babcock Ranch

“Fossil fuel people are starting to diversify, getting on the bandwagon with other energy sources,” says Jack Armstrong, a board member at Team Zero (formerly the Net Zero Energy Coalition), a group of industry stakeholders collaborating to bring broad industry-led national awareness of zero energy buildings.

The trend toward net-zero homes enabled by solar is accelerating in states that have adopted tax rebates and other incentives for community-wide solar installations. Among the leaders is Minnesota, which approved a solar garden initiative in 2013 and claims about one-third of the country’s community solar generation. Working with Cooperative Energy Futures (CEF), an investor in and supplier of solar-generated electricity, members typically buy a share of a common solar plot and in return get credits to reduce their electricity bills.

Such solar “farms” (photo, left) can sprout in urban as well as rural settings. CEF generates 1.37 megawatts of power with a canopy of solar panels atop a parking garage in downtown Minneapolis. It serves 150 households, saving users about 10% on their utility bills, according to Timothy DenHerder-Thomas, Cooperative Energy Futures’ general manager.

With Denver city and county seeking to reduce energy consumption 30% by 2030, the Denver Housing Authority (DHA) began installing rooftop solar panels on 665 properties in 2005; another 2,335 were eligible, but were ultimately deemed unsuited due to issues of excessive shading, rooftop conditions, or redevelopment plans.

North Lincoln Homes is a public housing project in Denver that offers affordable row homes with rooftop solar arrays to help reduce monthly energy bills and reliance on legacy energy resources. | Photo: courtesy Denver Housing Authority/Mike Laughlin Photographer

With approval from Xcel Energy, the local utility, the DHA took the next step, establishing the nation’s first housing authority developed, owned, and operated solar garden, a 2 megawatt facility with an array of 5,958 panels. Located on 10 acres in a Denver suburb, it serves some 500 low-income homes.

The solar farm, launched in 2017, is “out of sight, out of mind,” says Chris Jedd, the DHA’s portfolio energy manager. “You don’t have to worry about damage on the roof, or if you want to sell or demolish a building. There is no debt on it, no equipment on it, and it gives a lot more flexibility and optionality within the portfolio.”

Mixed-Fuel Solutions and All-Electric Codes in Home Building

In some regions and climates, community solar is not in play and a combination of rooftop solar and natural gas continues to dominate home building and remodeling.

“There is no perfect panacea in one energy source,” said Bill Owens, founder and president of Owens Construction, in Worthington, Ohio, in a recent webinar sponsored by the Propane Education & Research Council (PERC). “It doesn’t make sense to do fully electric for whatever reason. That’s a mandate I just can’t see coming to fruition.”

“A common misconception is that to get to zero energy or zero energy-ready, your homes have to be all-electric,” says Bryan Cordill, director of residential and commercial business development at PERC. “The truth is that getting to zero doesn’t mean giving up desirable, high-performing gas systems,” such as those used for cooking and water heating.

Still, in California alone, 42 municipalities have adopted all-electric building codes. With that, the state’s Title 24 energy code requires that all new homes must be zero net energy by 2022, essentially mandating the use of solar panels either on individual homes or from community-wide arrays.

Denver’s Thrive Home Builders sells homes with rooftop solar arrays as standard, and recently committed to an all-electric option, including cooking appliances, HVAC equipment, and fireplaces to replace those powered by natural gas.

Bill Rectanus, Thrive’s VP of operations, notes “health risks” associated with natural gas, such as leaks that can lead to explosions and worse. Still, he adds, many homebuyers prefer their gas fireplaces and stoves. “You watch any cooking show, they’re all cooking over gas,” he says.

Storm-driven electrical power outages and grid reliability are other deterrents to going all-electric. “Propane generators and appliances that use minimal electricity make homes more resilient and dependable,” Cordill says.

But as solar has grown in popularity, so have backup batteries to guard against power grid reliability problems and to provide power for a few critical systems, such as a refrigerator, heating or cooling equipment, or Wi-Fi and a computer. In fact, part of Thrive’s optional all-electric home package includes backup batteries that collect and store energy from the home’s rooftop solar array.

(Fossil) Fueling the Resistance Against Solar

PERC and other fossil fuel industry stakeholders, meanwhile, have been lobbying to curtail local authorities’ efforts to reduce emissions and advance solar.

Industry supporters have introduced such measures in Indiana, Kansas, Mississippi, Missouri, Texas, and Utah. Last year four other states—Arizona, Louisiana, Oklahoma, and Tennessee—passed laws preventing localities from adopting zero-emission building codes that essentially ban new natural gas service hookups for new buildings, including homes.

Cordill also points to Colorado builder Andrew Michler’s MARTaK project, the state’s first certified International Passive House. Although electricity is provided solely from photovoltaics, the house relies on a traditional propane water heater to meet its minimal heating and domestic hot water requirements. It also uses propane-fueled kitchen appliances.

But even in progressive communities, expanding solar can be divisive. In Montgomery County, Md., adjoining the District of Columbia, a plan to allow additional solar farms on up to 1,800 acres inside a 93,000-acre agricultural preserve was reduced by more than 70%. Critics argued that more community solar would threaten the prized farmland economy. Advocates noted farmers are paid to lease the land, and animals can graze beneath the solar panels.

The original proposal would have powered 50,000 homes elsewhere in the county, but the measure ultimately adopted by the Montgomery County Council reduced that to 2,000, according to Hans Riemer, an at-large member of the council and a leading proponent of the solar farm initiative in its original form.

Another amendment added more procedural requirements that Riemer said would further hamper solar farms in the reserve. “This is a prohibition,” he says. “Frankly, it’s devastating. If combined with additional restrictions, there’s nothing left.”