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Solar Installation Invoice Template

System size, equipment, permitting, interconnection and incentives. Free PDF, no account.

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A solar invoice is checked against a proposal written months earlier and against whatever incentive the customer believes they are getting. Both have moved: equipment gets substituted, permits and interconnection take their own path, and the federal residential credit is no longer what it was. Naming the system, the equipment actually installed and the incentive position is what keeps the final invoice from becoming an argument about the proposal.

INVOICE Issued
Invoice number:INV-0001
Date of issue:August 2, 2026
Date due:August 16, 2026
Currency:USD
Issued by
Meridian Solar Works
4400 Array Road
87107 Albuquerque, NM
United States
billing@meridiansolarworks.example
Bill to
Wendell and Ana Prieto
1220 Sandia View
87124 Rio Rancho, NM
United States
prieto.home@example.com
Amount due
$21,585.00
Due in 14 days · Aug 16, 2026
Ownership and incentives
System is owned outright by the homeowner. The federal residential clean energy credit under Section 25D ended for expenditures after 31 December 2025 and is not available for this installation. The state and utility programmes you were shown are applied for separately and are not deducted from this invoice.
Description Qty Rate Tax Amount
PV system — 8.4 kW DC
21 panels at 400W, roof mounted, south and west arrays
1$17,640.00—$17,640.00
Inverter and monitoring
String inverter with module-level optimisers and monitoring portal
1$3,200.00—$3,200.00
Permitting and inspection
City permit and electrical inspection, at cost
1$485.00—$485.00
Utility interconnection
Application, bi-directional meter fee, at cost
1$260.00—$260.00
Subtotal$21,585.00
Total$21,585.00
Amount due $21,585.00
Terms
Net 14 from permission to operate. Workmanship warranted 10 years; panels and inverter carry their manufacturers' own warranties.
Invoice #INV-0001 · Meridian Solar Works · Page 1 of 1

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What to put on a solar installation invoice

  • System size in kW DC, and the panel and inverter models actually installed
  • Any equipment substituted from the proposal, named, with the reason
  • Permitting and inspection fees, passed through at cost
  • Utility interconnection application and any meter fee
  • The workmanship warranty and, separately, the manufacturer warranties on panels and inverters
  • The incentive position stated accurately — do not print a credit the customer cannot claim

Questions

Does the 30% federal credit still apply to a homeowner in 2026?

No. The residential clean energy credit under Section 25D applied to expenditures made through 31 December 2025 and was ended early by the legislation passed in July 2025. A homeowner-owned system placed in service in 2026 or later has no Section 25D credit. Say so on the invoice rather than letting a customer discover it at tax time.

Is there any 30% credit left?

For business-owned systems, and for third-party-owned residential systems under a lease or power purchase agreement, the commercial credit under Section 48E still applies to systems placed in service by the end of 2027. That is the owner's credit, not the homeowner's, which is exactly why the ownership model belongs on the paperwork.

Should state incentives appear on the invoice?

Name them, do not net them off. State rebates and utility programmes are applied for separately and paid on their own schedule, and an invoice that quietly deducts one leaves the customer unable to tell whether it ever arrived.

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