I don’t need to ask grok.

Here are high-ball numbers for going off the grid; 2000 sf house in California:

- 30 panels ~ 10kw: $20K

- batteries ~ 10kwh: $8K.

- permits + labor: $20K (California...)

- 100+kwh EV with v2h bidirectional charging: $50K

- comparable ICE car (offset): -$40K

- heat pump water heater $1.5K

- heat pump furnace: $15K

- induction range: $2K

That adds to: $76.5K. Typical PG&E bills are $500-1000 per month. Budget $200 / month for gas. (Again, California prices.). That’s 63-110 months till break even, which is less than the expected lifetime of the panels + battery.

For another $10-20K, you can add propane backup, but I assume extended storms are rare enough to just charge the car and drive the electrons home a few times a year. A fireplace is about $5k installed.

Not going full off-grid is cheaper. So is scaling up to beyond one house.

LLMs should not be used as a reliable source of numbers for research like that. You keep saying how obvious this is and trivial to research. Maybe just post a quality research link instead in that case?

From o1 pro with deep research

# Comparison of Power Generation Options

## Upfront Capital Cost - *Nuclear*: Very high (£4,000-6,000/kW), with 10+ year construction time - *Natural Gas (CCGT)*: Low to moderate (£500-1,000/kW), with 2-3 year construction time - *Wind + Battery*: Moderate for turbines (£1,000-1,500/kW) plus substantial battery costs - *Solar + Battery*: Moderate for panels (£800-1,200/kW) plus large battery costs, especially for winter

## Plant Lifespan - *Nuclear*: Typically 60 years, with possible extensions; 2+ builds over 100 years - *Natural Gas*: 25-30 years; requires 3-4 rebuilds over 100 years - *Wind + Battery*: 25 years for turbines, 10-15 years for batteries; multiple replacements needed - *Solar + Battery*: 25-30 years for panels (with declining output), 10-15 years for batteries

## Fuel & Operating Costs - *Nuclear*: Low fuel cost, high operating cost (staffing, maintenance, safety) - *Natural Gas*: Major cost is fuel (price volatility), plus potential carbon costs - *Wind + Battery*: No fuel cost, moderate turbine O&M, plus battery replacement costs - *Solar + Battery*: No fuel cost, low panel O&M, plus battery replacement costs

## Levelized Cost (No subsidies) - *Nuclear*: £90-120/MWh - *Natural Gas*: £50-60/MWh (without carbon cost), £100+/MWh with high carbon prices - *Wind + Battery*: Base wind £40-50/MWh, potentially exceeding £100-150/MWh with storage for 90% CF - *Solar + Battery*: Base solar £40-50/MWh, potentially exceeding £150-200/MWh with storage

## Reliability / Capacity Factor - *Nuclear*: ~90% capacity factor, suited for baseload - *Natural Gas*: 80-90% if run as baseload, highly flexible - *Wind + Battery*: 35-50% raw CF for wind alone, requires battery + overbuild for 90% CF - *Solar + Battery*: 10-15% raw CF in UK, requires massive overbuild and storage for 90% CF

## Key Advantages - *Nuclear*: High-capacity 24/7 baseload, low CO₂, stable long-term output - *Natural Gas*: Low upfront capital, flexible/dispatchable, mature technology - *Wind + Battery*: Carbon-free, potentially low marginal wind cost, lower price volatility - *Solar + Battery*: Carbon-free, low operating costs, suitable for distributed generation

## Key Drawbacks - *Nuclear*: Expensive upfront, complex construction, decommissioning burden - *Natural Gas*: Volatile fuel costs, CO₂ emissions unless carbon capture added - *Wind + Battery*: High cost for baseload reliability, weather-dependent, multiple battery replacements - *Solar + Battery*: Very high overbuild and storage needs for 90% CF, seasonal variation