Path-Q Solar

How should a small business decide whether the cost of renting temporary generation is justified when solar repairs will interrupt power needed for business operations?

Answer

Rent temporary generation when its fully loaded cost is lower than the expected cost of operating without power, adjusted for uncertainty and safety. Compare rental, delivery, connection, fuel, supervision, permitting, noise, maintenance, and removal costs with lost margin, spoiled goods, labor, downtime, missed commitments, and restart risk.

Key points

  • Estimate repair duration as a range, not a single promise, and include setup, testing, and possible extension days.
  • Separate loads that must remain powered from those that can be deferred or shut down.
  • Confirm generator capacity, fuel autonomy, connection method, power quality, emissions or noise constraints, and safe backfeed prevention.
  • Include the probability and consequence of delay, not only the expected average cost.

What it depends on

  • Critical loads and cost of interruption
  • Repair scope, duration, and provider confidence
  • Temporary generation rental and connection requirements
  • Site electrical configuration and qualified personnel
  • Operational, safety, environmental, and access constraints

Risks and trade-offs

  • Rental may be uneconomic for a short repair but valuable if delay risk is high.
  • Improper connection or undersizing can damage equipment or create lethal backfeed hazards.
  • Generators introduce fuel, noise, emissions, maintenance, and additional failure risks.

Information you may need

  • Critical-load inventory and hourly business interruption cost
  • Repair estimate with optimistic, expected, and worst-case durations
  • Itemized rental and connection quotes
  • Qualified electrician's temporary-power plan

Your next step

What to do next

Obtain a repair-duration range and an itemized temporary-generation quote, then compare both with a documented downtime cost under several duration scenarios.

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SQ03259