Path-Q Solar
When should I obtain a battery quote before deciding whether a solar-only system is adequate?
Answer
Obtain a battery quote when outage backup, evening energy use, limited ability to export energy, or a desire to shift solar use makes storage potentially important. A solar-only proposal may be adequate when your main goal is daytime use or when storage would add cost without serving a clear need.
Key points
- Ask for solar-only and solar-plus-battery designs using the same load and production assumptions.
- Specify which loads would need backup, for how long, and whether the battery can start and operate them safely.
- Compare usable battery capacity, power output, operating controls, warranty, replacement assumptions, and maintenance.
- Evaluate how much daytime solar would otherwise be self-consumed, exported, curtailed, or unused.
What it depends on
- Outage priorities and required backup duration
- Hourly electricity use
- Solar production and export conditions
- Battery power and capacity
- Budget and expected ownership period
Risks and trade-offs
- A battery can improve resilience but adds cost, equipment, space, and eventual replacement considerations.
- A battery sized for rare outages may be uneconomic for everyday use.
- Storage does not guarantee whole-property backup or operation during every grid condition.
Information you may need
- Hourly or interval usage data
- Critical-load list and outage expectations
- Solar-only and battery-inclusive quotes
- Battery warranty, usable capacity, power rating, and replacement assumptions
Your next step
What to do next
Request a matched solar-only versus battery proposal and ask the installer to state exactly which loads are backed up and under what operating conditions.
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