Path-Q Solar
Is solar still a good fit if I usually charge my EV overnight?
Answer
Yes, solar can still offset the energy used by an EV charged overnight, but the financial and energy benefit depends on how exported daytime solar is credited and what nighttime electricity costs. Overnight charging reduces direct use of solar, so managed daytime charging can improve the result when practical.
Key points
- Annual energy offset can still be meaningful even when charging and production occur at different times.
- Charging during solar hours generally increases on-site use and reduces dependence on export treatment.
- A home battery may shift solar to nighttime but adds cost, losses, and replacement considerations.
- The EV load should be modeled alongside the home's normal day and night consumption.
What it depends on
- Charging schedule and flexibility
- Vehicle energy use
- Solar production timing
- Grid import and export treatment
- Battery cost and operating assumptions
Risks and trade-offs
- Poor export compensation can reduce the value of daytime production sent to the grid.
- A battery may improve timing but not necessarily improve total economics.
- Forcing daytime charging may conflict with driving needs or convenience.
Information you may need
- EV charging energy and schedule
- Solar production estimate
- Electricity import and export terms
- Ability to use managed charging
- Battery preferences, if relevant
Your next step
What to do next
Compare annual costs for overnight charging, managed daytime charging, and optional battery shifting using the applicable account terms.
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