C&I storage quotes become slow when the buyer only sends a target kWh. The supplier still needs power rating, AC voltage, use case, site constraints and shipping expectations.
A better RFQ makes the technical conversation shorter and the price more realistic.
Define the use case first
Backup power, peak shaving, PV self-consumption and grid support use different power-to-energy ratios. The same 100kWh capacity can mean very different hardware depending on the job.
Include the surrounding electrical system
AC protection, distribution boards, cable entry and site service clearance should be considered together with the storage cabinet. Otherwise the order may arrive without the parts needed to install it cleanly.