Path-Q Solar
Which home circuits should be included if I want limited backup rather than whole-home backup?
Answer
Include loads that are important, practical to operate within the battery's power and energy limits, and likely to be needed during an outage. Common priorities may include refrigeration, selected lighting, communications, medical equipment, internet equipment, and limited outlets, while high-power or nonessential loads are often excluded unless specifically designed for. The final circuit list should reflect household needs and appliance startup behavior.
Key points
- Prioritize safety, medical needs, food preservation, communications, and basic lighting.
- Separate high-energy loads such as electric heating, water heating, cooking, vehicle charging, and large pumps unless the system is designed for them.
- A critical-loads panel or managed-load design can prevent accidental overloading.
- The circuit list should be tested against both continuous and startup power.
What it depends on
- Household priorities and medical requirements
- Circuit-level appliance loads
- Battery and inverter power and energy limits
- Existing electrical-panel layout and transfer equipment
Risks and trade-offs
- Including too many circuits can shorten runtime or overload the inverter.
- Excluding a circuit may affect connected loads that are easy to overlook.
- Circuit separation and backup equipment must be installed safely and according to applicable requirements.
Information you may need
- Circuit directory and appliance inventory
- Running and startup loads
- Desired outage duration
- Battery, inverter, and transfer-equipment capabilities
Your next step
What to do next
Mark essential, optional, and excluded circuits on the electrical panel schedule, then have the proposed backup design verify load power, energy use, and circuit separation.
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SQ01169