Installed-system data model

InstalledSystem is the durable service record for a commissioned customer asset. It optionally links Company, Contact, Lead, Opportunity, Audit, Quote, Invoice, Project, and Document.

It stores site details, system type, inverter/battery/solar capacities, commissioning date, free-support end date, status, and whether an incomplete-project warning was acknowledged.

Children are support tickets, maintenance visits, warranty records, and support plans. Source records remain authoritative and are not copied beyond useful service context.