Solar quotes usually start with your electricity usage, roof details and goals, followed by system options and an estimated price. Check what is included, such as panels, inverter, installation, monitoring, approvals, warranties, the assumed STC discount and any battery or export limits. Compare the system size and expected production using the same assumptions, rather than choosing only on the lowest upfront cost. Before signing, confirm the installer’s accreditation, written inclusions and payment terms, and ask an independent adviser or your energy retailer about connection requirements.