Path-Q Solar
What information should I collect about outages before deciding on battery backup?
Answer
Collect outage frequency, duration, season, warning time, affected circuits, and the loads that must remain powered. Also record whether outages are brief interruptions or extended events, because that determines whether a small battery, larger battery, generator, load management, or another solution is appropriate.
Key points
- List critical loads such as refrigeration, medical equipment, communications, heating, cooling, pumps, and security systems.
- Record each load's starting surge, running power, duty cycle, and acceptable interruption.
- Separate whole-home backup from selected-circuit backup.
- Include fuel, maintenance, noise, manual intervention, and recharge expectations in the comparison.
What it depends on
- Historical outage frequency and duration
- Critical-load power and energy needs
- Whether solar operates during an outage
- Desired automatic operation and backup duration
Risks and trade-offs
- Sizing for rare, long outages can be expensive.
- A battery sized only for average load may fail when motors or heating equipment start.
- Actual outage conditions can exceed historical records.
Information you may need
- Utility outage history and personal outage log
- Critical-load list and appliance specifications
- Desired duration and acceptable service interruptions
- Existing electrical panel, solar, and backup equipment
Your next step
What to do next
Create a critical-load worksheet with power and duration targets, then ask providers to size and price backup options against that worksheet.
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