Articles

Geothermal heat pump cost: measured installs averaged $10,570 a ton (about $31,700 for 3 tons) and 2026 has no federal credit. Savings by fuel and payback.

Monocrystalline vs polycrystalline vs thin-film: mono PERC (20-22%) and TOPCon (22-24%) beat poly (15-17%) for homes. Efficiency, cost, heat.

How to size a home battery: walk through the essential load math, solar surplus calculation, and TOU arbitrage sizing for backup, solar storage, and rate.

Tidal and wave energy in 2026: tidal is predictable and running in France, Korea and Scotland; wave energy is still being tested, as at Oregon's PacWave.

Hydrogen fuel cell home backup is real technology but pre-commercial for most US homeowners in 2026. Fuel costs, availability, and what to buy instead.

What is a virtual power plant? Home batteries, EV chargers and thermostats pooled by software to act like one power plant. How enrollment and pay work.

Learn how wind turbines work: blade aerodynamics, the 59.3% Betz limit, gearbox vs direct-drive, and why taller turbines produce far more power.

Net metering in 2026: retail credits in NJ, MA, ME, MD and NY; net billing in California, Hawaii and Arizona; a new tariff in CT. How it changes payback.

Building-integrated photovoltaics (BIPV) explained: Tesla Solar Roof vs standard panels, solar facades, PV glass, real costs and 2026 payback math.

What is a microgrid? A local grid of generation, batteries and controls that can island from the main grid in an outage. Uses, costs, home versions.

Small modular reactors in 2026: NuScale's Idaho plant was cancelled, China's Linglong One is still commissioning, and US plants are just getting permits.

Hybrid renewable energy systems pair solar with wind, hydro or generators for reliability. When multiple power sources make financial sense.

How do solar panels actually work? Sunlight frees electrons in silicon cells to make DC power, an inverter turns it into AC, and heat and shade cut output.

Home battery storage in 2026: Tesla Powerwall 3 vs Enphase IQ Battery 10C vs FranklinWH aPower 2 on capacity, output and warranty, now without the 30% credit.

Vehicle-to-grid (V2G) explained: V2H can run a home for days from EVs like the Cybertruck (11.5kW) or GM EVs (9.6kW); paid V2G is still mostly pilots.

Pumped hydro storage explained: water pumped uphill returns about 70% to 80% of the energy. The US has about 22GW, led by 3,003MW Bath County, Virginia.

How the electric grid works: the three-tier system, frequency balancing, why Texas has its own grid, and what caused the 2021 Texas blackouts.

Solar carport costs: 4.8-8 kW would cost $14,400-$28,800 on a roof at 2025 medians, and the frame adds more. No 2026 federal credit. Payback and EV use.