Warranty Transfer: Your Guide
You are selling your house. You’ve listed the "5kW Solar System" as a major selling point. The buyer is excited about the zero electric bill.
But the day after the sale, the inverter shows a red light. The buyer calls the installer, and the installer says, "Sorry, my contract was with the previous owner. I don't know you."
Suddenly, your "premium solar asset" is a liability.
In the Philippines, a solar warranty is not automatically attached to the roof; it is often attached to the person who signed the check. If you don't legally transfer it, it dies the moment the Deed of Absolute Sale is notarized.
Whether you are buying a home with solar or selling one, here is how to transfer the warranty without losing your mind (or your coverage).
The Two Warranties You Must Transfer
First, stop thinking of "the warranty" as one thing. It is two distinct legal agreements, and they transfer differently.
1. The Manufacturer Warranty (The Equipment)
This covers the hardware—the panels and the inverter.
Good news: This is usually tied to the Serial Number. If the panel fails, the manufacturer (Huawei, Growatt, Longi, etc.) generally honors the claim regardless of who owns the house, provided the equipment hasn't been moved.
Bad news: Some brands (like Enphase) require a formal "Change of Ownership" form and a fee (often around $199 or ~₱11,000) to keep the warranty valid. If you skip this within 30 days of moving in, the coverage might be voided.
2. The Workmanship Warranty (The Labor)
This covers the installation—roof leaks, loose wires, and blowing fuses.
The Reality: This is a contract between the Original Installer and the Original Owner. It rarely transfers automatically.
The Fix: You must contact the installer before the sale. Most reputable Philippine installers will agree to transfer the workmanship warranty to the new owner, sometimes for a small inspection fee (to prove the system works at the time of transfer).
If you don't do this, and the roof leaks next typhoon season, the new owner is on their own.
The Meralco Net Metering Transfer
This is the step everyone forgets. The "Net Metering" account is named after the Meralco account holder. If you sell the house, you must transfer the Meralco meter and the Net Metering agreement.
This is not just a simple change of name. It effectively triggers a review of the system.
The Process
Legal Docs: You need the Deed of Sale and proof of ownership (Transfer Certificate of Title).
The "Switch Service" Application: The new owner must apply to Meralco to switch the service name. For Net Metering customers, this involves signing an Amended Net-Metering Agreement.
The Requirements: Meralco may ask for the original Certificate of Final Electrical Inspection (CFEI) and the Certificate of Compliance (COC) from the ERC.
Critical Warning: If you (the seller) lost these documents, the new owner might be forced to re-apply for Net Metering from scratch, which costs thousands of pesos and months of waiting.
For a refresher on what these documents look like, review our guide on the net metering application process.
Brand-Specific Transfer Rules
Different brands have different "personalities" when it comes to second-hand owners.
Huawei: generally ties the warranty to the product serial number and the country of installation. They focus on the device, not the person. However, they may require proof of purchase if the system wasn't registered online.
Enphase: Strict. You must fill out their transfer form and pay the transfer fee. If you don't pay, you lose the remaining years of your 25-year coverage.
Growatt: Their paperwork often says "limited to original consumer purchaser" and "non-transferable". However, in practice, local distributors often honor the warranty if the unit is still on the original roof, but it is discretionary. You must get written confirmation from the local distributor during the handover.
You can learn more about general coverage terms in our guide to solar warranties.
The "Orphan System" Risk
The most dangerous scenario for a home buyer is buying a house with an "Orphan System"—where the original installer has gone out of business.
If the installer is gone:
Workmanship Warranty: It is dead. No one is coming to fix the roof leak.
Manufacturer Warranty: You can still claim it, but you have to do the legwork yourself. You will need to find a new certified installer to process the RMA (Return Merchandise Authorization).
Buyer Tip: Ask the seller for the installer's contact info. Call the number. If it's disconnected, you are buying an orphan system. Negotiate a lower price for the house to cover the risk of future repairs. You can also use our tips on how to verify installer credentials to see if the company is still active.
Seller’s Checklist: How to Add Value
If you are selling, don't just say "House with Solar." Package the warranty to justify a higher property price.
Compile the "Solar Folder": Include the original invoice, the Net Metering agreement, the user manuals, and the warranty certificates.
Maintenance Log: Show that you cleaned the panels. Manufacturers can void warranties if they see damage caused by negligence (like years of bird droppings causing hotspots). A simple logbook proves you did your part. See our guide on solar panel maintenance.
Pre-Transfer Inspection: Pay your installer ~₱3,000 to inspect the system and issue a "System Health Check." Give this to the buyer. It proves the system is working now, preventing disputes later.
Buyer’s Checklist: Due Diligence
Don't be dazzled by the panels.
Ask for the Original Invoice: No invoice = no proof of purchase date = no warranty start date.
Check the Monitoring App: Ask the seller to open the app (FusionSolar, Enlighten, ShinePhone). If the system shows "Offline" for the last 6 months, you are buying a headache, not an asset.
Verify the Net Metering: Check the electric bill. Does it explicitly say "Net Metering" or "Export Energy"? If not, the system might be an illegal "guerrilla" install, and Meralco could fine you.
Conclusion
Transferring a solar warranty is 20% filling out forms and 80% having the original paperwork.
If you are the seller, organizing these documents is the easiest way to defend your asking price. Solar increases property value, but only if the asset is secure.
If you are the buyer, treat the solar system like a used car. You wouldn't buy a car without the OR/CR; don't buy a solar home without the CFEI and Warranty Certificates.