Path-Q Solar

When should I ask for a battery-only quote instead of a combined solar-and-battery proposal?

Answer

Request a battery-only quote when you already have solar, want storage for backup or load shifting, or need to compare storage independently from a new solar system. A combined proposal is more appropriate when solar is also being installed or when the existing solar system may not be compatible with the intended battery.

Key points

  • Provide the existing system's inverter, panel, monitoring, and installation information.
  • Define whether the battery is intended for backup, bill management, self-consumption, or another purpose.
  • Ask whether the battery is AC-coupled or DC-coupled and what equipment changes are required.
  • Compare usable capacity, power output, backup circuits, controls, warranty, and installation scope.

What it depends on

  • Existing solar architecture and equipment compatibility
  • Desired backed-up loads and duration
  • Whether the battery can operate during a grid outage
  • Electrical-panel and interconnection requirements

Risks and trade-offs

  • A battery may not provide whole-home backup or operate all loads simultaneously.
  • Battery-only installation can require additional controls, panel work, or inverter changes.
  • Adding storage may provide resilience but may not be financially attractive without a clear operating objective.
  • A combined proposal may simplify integration but make it harder to compare the storage portion independently.

Information you may need

  • Existing solar equipment documentation
  • Recent electricity bills and outage history
  • List of critical loads and desired backup duration
  • Separate battery-only and combined-system scopes and prices

Your next step

What to do next

Ask for a battery-only proposal that identifies compatibility, backed-up circuits, usable capacity, power, and all required electrical work.

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