Longkou pairs a heavy industrial base with an active port, so its charging map has three layers: residential compounds on e-bike stations, factories charging around shift patterns, and logistics fleets that need real DC power on dedicated circuits. Each layer has its own sizing logic, and treating a factory yard like a car park is the fastest way to build something the operations manager will not accept.
Three demand structures
- Residential compounds — 10- and 20-port e-bike stations, one port per 30–50 active e-bikes, plus a few 7kW AC chargers for daily commuters.
- Factories and industrial parks — employee e-bike charging plus business-vehicle top-ups, sized to shift arrival peaks rather than head count.
- Logistics and the port — concentrated charging for electric freight vehicles: high-power DC, dedicated circuits and usually a dedicated transformer.
Sizing industrial charging
Industry differs from housing in three ways: dwell times are predictable, usage concentrates hard around shifts, and reliability is production-critical. We record when each shift actually arrives, then install for 70–80% of the peak request rate; key-position vehicles get dedicated piles; and where the load profile demands it we add storage or load scheduling to flatten the impact. Billing supports per-department, per-vehicle and per-employee-ID reports, so the plant can fold charging into its energy ledger without manual spreadsheets.
Residential basics, briefly
The siting rule beats the quantity rule: near building entrances but never blocking evacuation, lit and camera-covered, on hardened ground that drains, a metre or more from gas piping. Evening-concentrated usage takes a 1.3× margin; sheltered, managed sites run about 30% busier than open-air ones.
O&M at 90 km: spares, not apologies
Longkou is about 90 km from central Yantai. The failure mode of distant projects is waiting — for a crew, then for a part. We assign O&M by area, keep charging modules, control boards and RCDs in local stock, and run the 7×24 platform with automatic work orders: 4-hour response, so a downed pile costs hours, not weeks.
How we deliver in Longkou City
- Free survey — site walk-through, photos, clamp-meter load recording where capacity is tight, then a written proposal with a fixed price.
- Grid application — we prepare drawings and paperwork and deal with the power supply company, so the property does not chase forms.
- Construction — in-house crews, cable trays and distribution boxes done to specification, typical duration 7–15 days.
- Platform onboarding — every device registered on Dongdian Huichong: scan-to-charge, billing, remote control, revenue dashboards and automatic fault work orders.
- Operation and maintenance — 7×24 monitoring, 4-hour fault response, on-site attendance within 24 hours, local spare parts, quarterly inspection.
Four safety configurations we do not cut
| Configuration | What it does | Why it matters |
|---|---|---|
| Independent RCD per port | 30 mA trip, under 0.1 s | One faulty port does not cut the whole station or other residents' charging |
| Overload cut-off with self-recovery | Breaks on abnormal current, restores automatically | Ageing batteries and poor chargers can pull 500 W+; unmanaged heat is a main fire cause |
| Full-charge auto-stop plus 8-hour cap | Stops on detected full charge, hard stop at 8 h | Prevents overcharge swelling and endless floating |
| Power-off memory | Restores billing state after an outage | Avoids disputes during the stormy season |
Three ways to cooperate
| Model | Cash flow for the property | Revenue share |
|---|---|---|
| We invest and operate | Zero cost; positive from month one | Property receives 30–40% of service-fee revenue |
| Joint investment | One-off contribution; payback typically 3–5 years | Property share up to 50–60% |
| Property buys, we maintain | Largest upfront spend | All revenue to the property; annual O&M fee |
Whichever model you choose, the property gets a platform account and sees every session, hour and yuan of revenue in real time. Settlement is calculated on the platform, so reconciliation is a report, not an argument.
Reference price ranges
| Scope | Reference range (RMB) |
|---|---|
| 10-port e-bike station incl. standard installation (cabling within 30 m, RCD box, signage) | 12,000–22,000 |
| 20-port e-bike station incl. standard installation | 18,000–32,000 |
| 7kW AC charger, device | 1,500–3,500 per unit |
| 7kW AC charger, installation | 1,000–2,500 per unit |
| 60 m² charging shelter with 10 ports, fire kit, lighting and CCTV | 35,000–55,000 |
These are public industry reference ranges, not a Dongshang quotation. Site conditions vary widely across Yantai; the binding figure is the fixed-price quotation issued after a free survey. We quote one price with no hidden additions.
Common questions
- How do you size charging for a factory with three shifts?
- We log each shift's actual arrival pattern, then install for 70-80% of the peak request rate, with dedicated piles for key vehicles and optional load scheduling to flatten the demand spike. Billing reports run per department, vehicle and employee ID.
- What does port or logistics charging require?
- Concentrated freight charging needs high-power DC on dedicated circuits, often its own transformer, and a charging schedule reversed from dispatch times. We plan the zone separately from employee charging.
- Who stocks the spare parts in Longkou?
- We do — charging modules, control boards and RCDs are held in area stock so a fault costs hours rather than a parts-order cycle. The platform raises the work order automatically.
Charging services across Yantai
We also survey, build and operate in Laiyang · Laizhou · Zhaoyuan and every other district of Yantai. Related pages: community charging projects, e-bike charging stations, charging shelters, cooperation models for property managers and the online calculators for investment estimates.