Key points in this article
What the signals actually show
Ordered charging changed through compounding factors, not a single event. One clear thread: a staged comparison refined repeatedly beats a one-shot rollout in both cost and reliability, and it leaves a cleaner record for the acceptance team to inspect with confidence.
What acceptance should see
At acceptance, look beyond the headline count. Confirm supply capacity, the protection functions of the equipment, and whether the record trail from installation to test is complete and traceable. A pile that cannot be audited is a pile nobody will trust to stay up.
The Yantai view and practical notes
We trust the site over paper. Walking the depot and hearing real feedback yields conclusions steadier than analysis from a desk, especially where conditions vary by location. The responsibility boundary belongs in a written agreement before handover to avoid later blame-shifting. Local conditions, not national averages, should guide the final call. The goal is a service people trust enough to use every day. Evidence collected early is what settles arguments before they start. That discipline is what keeps the local program credible over time.