Latest prices for rooftop photovoltaic panels BESS

How much would a rooftop solar system cost without Bess?

Without BESS, the same household could install 10 kW of rooftop solar, which would cost $28,700 and save $1,567 per year. PGE and the state of Oregon both offer incentives for rooftop solar and battery energy storage. With the utility, state, and federal incentives, the combined solar and BESS system could be paid back within 11 years.

What is rooftop solar & Bess?

Rooftop solar and BESS can provide both energy to homeowners as well as relieve some load on the power grid as a whole. “We want readers to be able to use this guide to make informed decisions for their family, their household, and their community going forward,” Kerby said.

Are rooftop solar panels or battery energy storage systems worth the cost?

Pacific Northwest National Laboratory (PNNL) researchers are here to help. Homeowners must navigate a quagmire of complicated policies to determine whether the energy savings from rooftop solar panels or battery energy storage systems (BESS) are worth the high upfront cost.

How much does a rooftop solar system cost in Washington?

A 7.5 kW rooftop solar system plus a 13.5 kWh BESS would cost $46,322 on average in Washington to install without incentives. The state’s largest utility, Puget Sound Energy (PSE), offers a TOU rate option, meaning prices are higher in the evenings and lower overnight, in the early morning, and on weekends.

How much does a rooftop solar system cost in Oregon?

In Oregon, a 7.5 kW rooftop solar system plus a 13.5 kWh BESS would cost $43,125 on average to install without incentives. The state’s largest utility, Portland General Electric (PGE), offers a TOU rate option, and Oregon also has a net metering policy, paying the same utility rate for excess solar production.

Are rooftop solar and battery energy storage a barrier to adoption?

Even with the benefits of rooftop solar and battery energy storage, the upfront cost of these systems is still a barrier to adoption. In some cases, especially for BESS, the time it takes for a homeowner to recoup the cost of the system with energy savings is longer than the lifetime of the technology itself.