What should I check in the first month after solar?

The first month after solar panel installation is when missing paperwork and a system that is not actually exporting are cheap to fix. After that, the crew has moved on and the retailer bill has already taught you the wrong lesson. Treat the month as commissioning, not as a victory lap.

You are checking four things: that the gear is documented, that it is allowed to run, that the numbers make sense, and that you know who to call. Home solar systems nz households regret skipping this because the next person who needs the file is a buyer, an insurer, or you on a wet Sunday when the app is blank.

The document pack

Before you pay the last invoice, or in the same week if you already have, collect the Electrical Safety Certificate, the distributed generation approval, panel and inverter serial numbers, warranty terms for panels, inverter and workmanship, the shutdown procedure, and the monitoring login. Photograph the inverter nameplate and the switchboard labels.

Store copies somewhere that survives a laptop failure. A future sale needs this pack. An insurance claim needs it. A warranty call in year six needs the serial, not a memory of the brochure. The installer guide lists the same pack from the buyer's side: https://homesolarinstallation.co.nz/blog/choose-solar-installer-nz/

If any item is missing, ask while the job is open. Reconstructing a certificate later is slower than asking the office that still has your file.

Confirm it is allowed to generate

Panels on the roof are not the same as permission to export. The lines company approval and the retailer meter setup are separate. Until both are done, the installer may have left the system off or limited. Read the approval and ask, in writing, whether you may export.

The timeline guide explains those clocks: https://homesolarinstallation.co.nz/blog/solar-installation-time-nz/ If a week has passed since the date they gave you and you have no approval and no explanation, ask for the application reference. Polite and specific beats waiting for the next bill.

Look at the isolators. A system switched off for inspection and never switched back looks identical to a failed inverter. The shutdown note should say the normal position of each switch.

What the app should do

On a clear day the power trace should rise in the morning and fall in the afternoon. A north array peaks near the middle of the day. An east-west split peaks earlier and later. Zero output on a bright noon, with the inverter showing a fault or offline, is a call. A low but smooth curve on a cloudy day is weather.

Learn the winter versus summer difference now, even if you commissioned in January. The winter guide is the scale: https://homesolarinstallation.co.nz/blog/winter-solar-output-nz/ A first month in July will not look like the brochure photo.

Set the app password to one you control. If the installer created the account, ask for the transfer steps. You want access after they change staff.

The first bill

The first retailer bill after switch-on is often a partial month, and it may not show export if the meter or the plan is not ready. Read import kilowatt-hours, export kilowatt-hours, and the daily charge as separate lines. A bill that still looks large can be a daily charge plus evening use, with export not yet credited.

Compare export on the bill with export on the inverter for the same dates, allowing for the meter read. A large gap is a reason to call, not a reason to conclude solar failed. The buy-back guide shows how credits appear: https://homesolarinstallation.co.nz/blog/solar-buyback-rates-nz/

Daily lines charges do not disappear. Solar reduces what you import. It does not delete the fixed part of the bill. EECA's annual savings examples, including about $1,246 for a typical 5 kW system in Auckland, are year figures, not a promise that the next invoice is zero.

House habits that show up immediately

If the hot water cylinder is still locked to a night window, the array will export or clip at noon and you will buy power at night to heat water. Ask whether a daytime schedule is possible. The cylinder guide is here: https://homesolarinstallation.co.nz/blog/solar-hot-water-nz/

Shift what you can without making the house awkward: dishwasher, washing, and a heat pump preheat if the building holds it. Note what you changed so the next bill has an explanation.

If an export limit is binding, midday clipping on a clear empty-house day is expected. Confirm the cap in the approval so you do not report it as a fault. https://homesolarinstallation.co.nz/blog/solar-export-limits-nz/

Who to call, and with what

Call the installer for generation far below their estimate on a clear day, inverter errors, a breaker that will not stay on, or water staining that started after the install. Call the retailer if export is approved but missing from the bill. Call the lines company only if the installer says the approval itself is the stuck item, and take the application number.

Send screenshots, the weather, and the meter read dates. A message that says it does not seem to be working gives them nothing to book.

Electrical smells, heat, or a breaker that is warm are stop-and-call items. Do not reset a hot breaker repeatedly. A licensed electrician, including Tromar Electrical if that is who holds the board work, should see anything that looks unsafe: https://tromarelectrical.co.nz/

A simple month-one list

Work through it once and file the answers.

• Certificate, approval, warranties, serials, shutdown note, monitoring login
• Written answer on whether export is live
• One clear day's screenshot next to the estimate
• First bill with import, export and daily charge read separately
• Cylinder and flexible loads: what schedule they are actually on
• Insurer told, if you have not done that yet

The same handover in every one of these suburbs

First-month checks after solar installation nz jobs are the same paperwork in Algies Bay, Arkles Bay, Army Bay, Big Omaha, Coatesville, Dairy Flat, Dome Forest, Dome Valley, Glorit, Gulf Harbour, Hatfields Beach, Helensville, Huapai, Kaukapakapa, Kawau Island, Kumeu, Leigh, Matakana, Muriwai, Omaha, Orewa, Puhoi, Riverhead, Snells Beach, South Head, Waimauku, Warkworth, Wellsford, Bayswater, Belmont, Campbells Bay, Castor Bay, Devonport, Forrest Hill, Hauraki, Milford, Narrow Neck, Stanley Point, Sunnynook and Takapuna. Travel can make a return visit slower for Kawau Island, South Head, Glorit or Wellsford than for Milford, Takapuna or Devonport, which is why you want the documents and the screenshots in week one, not after a season of guessing. Salt air does not change the certificate. It does mean you should notice corrosion or loose coastal fixings early and photograph them.

If you are still choosing an installer, Home Solar Installation NZ can introduce a local partner. The form is free and there is no obligation. Ask who you call in month one before you pay the deposit. EECA's public cost and savings context is here: https://www.eeca.govt.nz/for-homes/solar-for-homes/solar-costs-and-savings/