Path-Q Solar

What payment milestones should a solar installation contract use?

Answer

Payments should be tied to clearly completed, documented milestones rather than calendar dates alone. A typical structure may include a modest deposit, a payment after design or permitting milestones, a payment after installation, and a final payment after inspection, utility approval, commissioning, and delivery of required documents.

Key points

  • The contract should define what evidence proves each milestone is complete.
  • The final payment should not be due merely because panels are mounted; it should account for system completion, correction of punch-list items, commissioning, and required approvals.
  • Payment amounts should be proportionate to the remaining work and should not leave the homeowner paying nearly the full price before completion.
  • The contract should state how disputed work, delays, cancellations, refunds, and failed inspections affect payment.

What it depends on

  • Whether the project is cash-purchased, financed, or leased
  • The scope of permitting, inspections, utility interconnection, and additional electrical work
  • Applicable consumer-protection and payment rules

Risks and trade-offs

  • Large upfront payments increase the homeowner's exposure if the installer delays, defaults, or performs defective work.
  • Holding too much payment until utility activation can create cash-flow or financing disputes if approval is delayed for reasons outside the installer's control.
  • A vague milestone schedule can make it difficult to determine whether a payment is actually due.

Information you may need

  • The proposed payment schedule and cancellation terms
  • The milestones included in the installation scope
  • Who controls permitting, inspection, and utility-interconnection submissions
  • Any applicable local limits or contract requirements for deposits and progress payments

Your next step

What to do next

Compare the proposed payment schedule with at least one other contract and ask the installer to define completion evidence, delay treatment, and final-payment conditions in writing.

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SQ00994