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What is constraining the inverter decision?

What is constraining the inverter decision. Check the cause, evidence to keep, recovery steps, and escalation.

Start here

Check whether the proposed inverter accepts the array’s string voltage/current across temperature and whether the DC/AC ratio fits manufacturer guidance.

What applies to this exact problem

Roof area and module DC capacity are fixed

Check whether the proposed inverter accepts the array’s string voltage/current across temperature and whether the DC/AC ratio fits manufacturer guidance.

Export/connection AC limit is fixed

Some designs intentionally use more DC module capacity than permitted AC export. Model clipping and scheme/DISCOM rules rather than assuming all extra DC becomes exported energy.

Roof has different orientations or shade zones

MPPT count and string layout may matter more than one headline inverter size. Keep unlike strings separated where design requires.

Future expansion is planned

Verify spare MPPT/current/voltage capacity and approval limits now. Buying an oversized inverter does not automatically make arbitrary future modules compatible.

Check these first

  • State the exact expected result and the exact result you have now.
  • Find the official record that owns the result and compare it with your evidence.
  • Change one thing at a time, then verify the final state before moving on.

Fix it in this order

  1. State the exact expected result and the exact result you have now.
  2. Find the official record that owns the result and compare it with your evidence.
  3. Separate hardware, installer, DISCOM/net-meter, portal, and subsidy status. They are different failure points.
  4. Record system size, module/inverter details, commissioning date, generation data, application IDs, and promised scope.
  5. Compare actual installation and generation with the signed quote, warranty, and portal/DISCOM records.
  6. Ask the responsible party for the exact pending action and owner of that action in writing.
  7. Do not close the job until safety checks, commissioning, monitoring, and applicable net-meter/subsidy records reconcile.

Build the proof pack

  • Signed quote and scope
  • Module/inverter serials and warranty
  • DISCOM/portal application IDs
  • Generation data, photos, and installer tickets

Avoid making the case harder

  • Paying the final amount before checking agreed milestones
  • Assuming low generation is automatically a bad panel
  • Treating installer completion as DISCOM/subsidy completion

How you know it is really fixed

  • The official record and your real-world result agree.
  • You have enough written evidence to prove the issue is finished if it returns later.

If it is still not fixed

  1. Installer/vendor grievance
  2. DISCOM/portal grievance route
  3. Consumer forum or other official remedy where appropriate

Official sources from the full guide

Need the complete context?

This page solves one branch. The parent guide covers the full decision, edge cases, alternatives, and related checks.

Open the full guide