Here are few other strong arguments why not to go down the export route that were supplied by AI. Maybe it is just me but 2.2 baht and all the rules and regs. I've got better things to do than go through this hassle for 2.2 baht :) Messy....and if you are like all the people I know with large solar setups, upgrades are inevitable. V V V V If you legally register your system to sell power back under the 2026 household solar scheme, you are locking yourself into a rigid, legally binding contract. Making major modifications afterward changes the game completely. Here is exactly what happens if you update an officially approved system: 1. The Inverter Swap Triggers a System RedoIf you change your inverter (whether it’s a replacement or an upgrade to handle more load), you cannot just swap it out. Because PEA’s contract is tied directly to the safety parameters and specific model numbers of their Approved Inverter List, a change requires a formal amendment application. The Catch: Your new inverter must be on the current approved list. If you buy an unapproved or hybrid inverter that doesn't strictly meet their anti-islanding or grid-tie specifications, they will reject it. 2. Adding Panels Triggers a Re-InspectionIf you expand your capacity (e.g., adding more kWp of panels to the roof), you are changing the total generation capability stated in your initial Power Purchase Agreement (PPA). The Process: You must file for a system expansion. This requires submitting updated single-line electrical diagrams stamped by a licensed electrical engineer. The Inspection: Yes, PEA will schedule another physical site inspection. An officer will come out to verify that the new panel layout matches the new diagrams, ensure the grounding and surge protections are still up to code, and confirm the system won't overload the local grid feeder. 3. The Local Feeder BottleneckThis is the hidden trap that trips up homeowners who try to expand later. PEA limits how much solar power can be fed back into any single local transformer district to prevent grid instability. If you try to upgrade your system size a year or two down the line, you might find that your neighbors have taken up the remaining transformer capacity. PEA can—and will—reject your expansion request simply because the local grid can no longer accept the extra power. Most people upgrading their systems mid-stream are doing it purely for self-consumption—adding a larger hybrid inverter and battery storage to cut their own bill. If you run a high-quality system with a smart zero-export limiter, you keep total control over your hardware choices and avoid the PEA inspection loop entirely.
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