Check whether both quotes solve the same problem
One quote may be designed for daytime solar use while another assumes future storage. One battery quote may include selected backup while the other does not. Write down the outcome you want before comparing line items.
Compare the proposed design
- Panel layout, roof faces and treatment of shade
- Inverter and battery architecture
- How existing solar is retained, changed or replaced
- Single- or three-phase considerations
- Monitoring, export control and selected backup scope
Read the electrical scope
Switchboard work, cable routes, equipment location, roof access and commissioning can materially change a job. Ask what is included and what might change after a site visit.
Test the energy assumptions
Ask how solar production, daytime use, evening loads and tariff windows connect to the recommendation. If the quote contains a savings figure, ask which tariff, usage and export assumptions sit behind it.
Check the handover and aftercare
Find out who coordinates paperwork, how monitoring is handed over, and who answers questions after installation. Recent genuine reviews can show whether communication and follow-up are part of the lived customer experience.
A useful second opinion is not a brand vote. It should explain the proposed design, inclusions and trade-offs in plain English, including when the simpler option is enough.
Discuss your bill and quote
A quote is easier to assess with household context. A recent bill can help, along with any roof, existing-system, battery, backup or EV information; share only what is useful to the conversation.