Solar panel buying guide

Use this checklist to have a better conversation with your installer. A site-specific design is more useful than a headline panel count.

01 / What matters

Start with the site.

Ask for a design that considers roof orientation, available area, shade and condition. Request an explanation of how those factors affect the proposed output.

Ask before you decide“Can you show the panel layout and the assumptions behind the generation estimate?”

02 / What matters

Match solar to when you use energy.

Using solar directly can reduce purchased electricity. Exported energy and electricity you buy can have different values, so assess both in the model.

Ask before you decide“How much generation am I expected to use at home, rather than export?”

03 / What matters

Panels are one part of the system.

Ask how the inverter, property phase, export permission and possible future battery fit together. Record exact model numbers in the quote.

Ask before you decide“What changes would I need if I added a battery later?”

04 / What matters

Compare the complete installation.

Request product and performance warranties, installation cover, monitoring inclusions and the process for support. Ask which switchboard or roof works are excluded.

Ask before you decide“Who is responsible if a component fails or the installation needs attention?”

05 / What matters

Already have solar? Check before replacing.

Collect your current inverter model, system size and generation records. Ask for repair, extension and replacement options where suitable, with costs explained.

Ask before you decide“Why is the proposed option better for this property than keeping the existing system?”

Sources & how we work

General buyer guidance, not a site assessment or live quote. We identify missing details before recommending equipment. LastBill may receive a referral or affiliate commission; any relationship is disclosed with the relevant offer.

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