Local presenter urges solar-plus-battery microgrids for resilience after extended outages
March 30, 2025 | Woodside Town, San Mateo County, California
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Jeff Beeman, founder of Mountain Microgrids, recommended a tiered approach to backup power — from portable batteries to whole‑house batteries to solar-plus-battery-plus-generator microgrids — and emphasized that the right choice depends on outage frequency, desired loads and budget.
Beeman said his neighborhood experienced prolonged outages in 2023, including a 13.5‑day period without grid power for his block. "At 5 and a half days, even if you have a 500‑gallon tank of propane... you ran the tank dry," he said, arguing that hybrid systems can avoid fuel logistics and extend autonomy.
He described practical trade-offs: portable gas generators are inexpensive but noisy and high‑maintenance; whole‑house standby generators are effective but burn significant fuel (he cited roughly $130 per day in propane for large units); home-battery systems are quieter and cheaper to operate; and combining solar with batteries can extend run time and improve the economics of a backup installation. He said, based on his installations and customer feedback, pairing a generator with a hybrid battery system can reduce generator run time by about 80% and that many homeowners see a 7–9 year ROI on combined systems, depending on usage and incentives.
Why it matters: as electrification increases household dependence on electricity for heating and hot water, longer or more frequent outages raise both comfort and safety issues; panelists said planning for resilience is increasingly part of electrification decisions.
What attendees asked: residents asked about vehicle-to-home capability and whether EVs can serve as home batteries. Beeman said regulatory and hardware limitations remain; Tesla has early gateway options in beta and some pilot programs (including a PG&E vehicle-to-home pilot with Ford F‑150 Lightning) are underway.
Next steps: attendees were invited to consult vendors that provide combined solar+battery systems and to consider incremental steps (portable batteries, inlet connections) as interim resilience measures.
Beeman said his neighborhood experienced prolonged outages in 2023, including a 13.5‑day period without grid power for his block. "At 5 and a half days, even if you have a 500‑gallon tank of propane... you ran the tank dry," he said, arguing that hybrid systems can avoid fuel logistics and extend autonomy.
He described practical trade-offs: portable gas generators are inexpensive but noisy and high‑maintenance; whole‑house standby generators are effective but burn significant fuel (he cited roughly $130 per day in propane for large units); home-battery systems are quieter and cheaper to operate; and combining solar with batteries can extend run time and improve the economics of a backup installation. He said, based on his installations and customer feedback, pairing a generator with a hybrid battery system can reduce generator run time by about 80% and that many homeowners see a 7–9 year ROI on combined systems, depending on usage and incentives.
Why it matters: as electrification increases household dependence on electricity for heating and hot water, longer or more frequent outages raise both comfort and safety issues; panelists said planning for resilience is increasingly part of electrification decisions.
What attendees asked: residents asked about vehicle-to-home capability and whether EVs can serve as home batteries. Beeman said regulatory and hardware limitations remain; Tesla has early gateway options in beta and some pilot programs (including a PG&E vehicle-to-home pilot with Ford F‑150 Lightning) are underway.
Next steps: attendees were invited to consult vendors that provide combined solar+battery systems and to consider incremental steps (portable batteries, inlet connections) as interim resilience measures.
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