The High-tech Zone is young: research campuses, office clusters and housing built this decade, with distribution planned generously. Charging projects here rarely need to argue with the transformer. What they need is proportion — the right AC/DC mix, trays reserved before handover, and one platform when a property group runs several sites at once.
Three scenes, one principle
- New residential compounds — owner expectations are highest here; charging present at handover is a sales point, missing at handover is a complaint generator.
- Science parks and offices — 7kW AC as the backbone for all-day employee parking, DC fast charging sized for visitors and business vehicles.
- R&D campus retail frontage — visitor-dominated, so the DC share rises and wayfinding matters more than raw port count.
Before handover is the cheapest moment
Building charging into a compound under construction saves 20–30% against retrofit and avoids re-cutting finished surfaces. Our pre-delivery package: charging-bay ratios by household count, reserved tray routes and capacity, shelter siting with fire clearances, and drawings ready for the construction organisation plan. The highest-leverage line item is the tray route — once a corridor is sealed and landscaped, every later bay pays double for cabling.
Parks: AC-led, DC for visitors
The default mix is 70–80% AC for long-dwell employees and 20–30% DC for short-dwell visitors, with shuttle or logistics fleets in a separately planned high-power zone with dedicated circuits and cooling. Billing splits into employee, visitor and fleet classes. A 20-port AC field draws about 140 kW at simultaneous full load; we check twelve months of peak load and, if the headroom is thin, add load scheduling — roughly a tenth of the cost of an upgrade — before proposing any new transformer.
One platform across many sites
High-tech Zone projects rarely come alone: a property group or park operator runs several sites, and per-site spreadsheets stop scaling. On Dongdian Huichong, every station's status, utilisation and revenue sit in one back office, faults raise automatic work orders, and reconciliation exports by day or month. A worked example we show park managers: a 300-household compound with 20 e-bike ports costs about RMB 30,000–50,000; at 1.5 sessions per port per day and RMB 1 per session, revenue is about RMB 900 per month, roughly RMB 500–600 net after electricity, for a 3–5 year payback — theoretical figures under stated assumptions, and pricing above the neighbourhood's tolerance simply pushes riders back to dangling cables.
How we deliver in the High-tech Zone
- 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
- Do High-tech Zone projects usually need a capacity upgrade?
- Rarely. New distribution here has genuine headroom. We still measure peak load first; if a 20-port AC field's ~140 kW is tight, load scheduling costs about a tenth of an upgrade and usually resolves it.
- We manage several compounds. Can we see them all in one place?
- Yes — the Dongdian Huichong platform gives one back office across all your sites: live status, utilisation, revenue, automatic fault work orders and daily or monthly reconciliation exports.
- What does a typical small project cost and earn?
- A 300-household compound with 20 e-bike ports is about RMB 30,000-50,000; roughly RMB 900/month revenue at 1.5 sessions per port per day and RMB 1 per session, netting RMB 500-600 after electricity, paying back in 3-5 years. Theoretical reference figures — actuals depend on utilisation and tariffs.
Charging services across Yantai
We also survey, build and operate in Penglai · Longkou · Laiyang 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.