How does the Ash Manor get electricity?

Previously on the same setting (:

1. How close is too close for a human habitation to be near an erupting volcano?
2. What factors could delay the rescue of a small group of survivors on a Pacific volcanic eruption?

TL;DR synopsis: early XXI century, south pacific island, VEI 4~5 volcanic eruption, survivors find shelter in a mansion atop a high cliff by the seaside. Rescue seems to be taking forever.
Hard survival psychological thriller mood.

The survivors find out that the Ash Manor (the stonemasonry mansion by the seaside cliff, singed by but still defying the erupting volcano) has elecricity. Rather strange, since everything else in the island melted in the lava flow, including one cell phone tower nearby.

The island's power plant is offline, and they discover that the power source of the manor is:

• No visible features, at least from the mansion grounds.
• Somewhat limited in output.
• Not magical.
• Not alien.
• Not from the future.
• Not geothermal.
• Not nuclear.

How does the Ash Manor get its electrical power?

Looking for science-based to hard-science answers.

posted over 9 years ago

Mindwin‭

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