Path-Q Solar
How does workplace charging affect the solar capacity needed for an electric vehicle?
Answer
Workplace charging reduces the energy that must be supplied by home charging, so the solar addition for the vehicle should be based on expected home-charged miles or energy rather than total vehicle driving. Include realistic changes in workplace access, charging availability, and travel patterns.
Key points
- Track how much energy is obtained at home versus elsewhere.
- Use actual vehicle efficiency and annual driving rather than a generic vehicle assumption.
- Workplace charging may be unavailable on some days, during travel, or after a job change.
- Home charging timing affects whether solar is used directly or whether energy is imported or stored.
What it depends on
- Annual driving distance
- Vehicle efficiency and charging losses
- Frequency and amount of workplace charging
- Home charging schedule and solar production
Risks and trade-offs
- Assuming workplace charging is permanent can undersize the system if circumstances change.
- Sizing for all driving may oversize the system when workplace charging is reliable.
- Charging away from home may have different costs or constraints that affect the economic comparison.
Information you may need
- Typical annual and weekly driving
- Home charging records or expected charging share
- Workplace charging availability and reliability
- Vehicle efficiency and home charging equipment
Your next step
What to do next
Estimate home-charged energy under current and fallback scenarios, then compare the resulting solar additions.
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