The handover that stops the callbacks

The crew leaves, the app shows numbers, the customer is pleased. Nobody signs anything and nobody writes anything down.

Then year two arrives with a question about generation, a warranty claim, a service visit by a different technician, or a customer who has sold the house, and none of the people involved know what was installed.

What a handover pack contains

Ten items. None of them takes long on the day; all of them are expensive to reconstruct later.

1. The as-built layout. What was actually installed, which is often not what was designed, with module positions and orientation.

2. Serial numbers by position. Modules and inverter, mapped to the layout. This is the single item that decides whether a warranty claim is easy, as in claiming a module or inverter warranty.

3. Commissioning measurements, dated: open circuit voltage and short circuit current per string, insulation resistance, and the earth resistance reading covered in one ohm, and the fire that starts in a connector.

4. Inverter configuration. The settings as configured, including grid code and any country or utility profile, screenshotted or recorded.

5. Photographs. The array, the structure and fixings, the DC and AC boxes before closing, the earth pit, and the labelling.

6. The documents. DISCOM sanction, commissioning certificate, net meter details, subsidy claim status, and the invoice.

7. Warranty documents, as they stood at purchase, for modules, inverter and your own workmanship.

8. Monitoring handover. The app installed on the customer's phone, the account in the customer's name rather than yours, and a demonstration of where to look.

9. The maintenance plan. Cleaning frequency, what you will do under an AMC and what they should do without one, as in an annual maintenance contract a customer will actually buy.

10. A signed acceptance. One page, confirming the system was demonstrated and the documents handed over.

The walkthrough that prevents most calls

Ten minutes on the roof and at the board, with whoever will actually be in the house.

Show them: where the AC isolator is and how to switch the system off, where the DC isolator is, what the inverter's normal display looks like, what an error looks like, what to do if the grid fails, and why the system will not run during an outage unless it was specifically built to. That last one causes more angry calls than any other single misunderstanding in Indian rooftop solar.

Then tell them what the first bill will look like, including the fixed charges that do not disappear, and when the meter reading cycle means they will first see the effect.

Why this pays for itself

Fewer callbacks. Most service calls in the first year are not faults. They are questions that a proper walkthrough answers.

Faster warranty claims, because the evidence exists.

Protection in a dispute. A signed acceptance with measurements and photographs settles a disagreement about workmanship. Its absence leaves your word against theirs.

Transferability. Houses get sold and plant managers change jobs. A system with a documented handover is one the new owner can maintain, and often one they call you to maintain.

Referrals. The handover is the last thing the customer experiences, so it is the memory that gets described to the neighbour who asks.

The internal version

Keep your own copy of everything above, per job, somewhere a technician can retrieve it from a rooftop three years later.

If that place is a WhatsApp group, you do not have it. Photographs expire from phones, staff leave and take their chats with them, and the person who needs the string layout is on a roof at eleven in the morning with one hand free.

This is also the capability that a performance linked subsidy regime would demand, if the reported PM Surya Ghar redesign happens as described in PM Surya Ghar 2.0 may pay for generation. The companies that will find that easy are the ones already recording commissioning properly today.

The short version

• Hand over ten things: as-built layout, serial numbers by position, dated commissioning measurements, inverter configuration, photographs, DISCOM and subsidy documents, warranty documents, monitoring in the customer's name, the maintenance plan, and a signed acceptance.
• Walk the customer through switching off, reading the inverter, and why the system does not run during a grid outage.
• Tell them what the first bill will look like, fixed charges included.
• The pack cuts callbacks, speeds warranty claims, settles disputes, survives a change of owner and generates referrals.
• Keep the internal copy somewhere a technician can reach from a roof. A WhatsApp group is not that place.