A credible proposal explains the customer’s energy problem, the assumptions behind the design and the responsibilities after installation.
For a branded commercial solar proposal, verify the current contracting entity, equipment and warranty provider before making a commitment.
Decide on cleaning from observed soiling, performance evidence and manufacturer instructions rather than a fixed universal schedule.
Battery storage is a design and operating decision, not an automatic addition to every solar project. Start with the problem storage must solve.
An inverter should fit the electrical design and operating conditions of the project; headline capacity alone is not a complete specification.