Site Readiness Guide
150kW DC Charger Installation Requirements: Site, Grid and Civil Checklist
A pre-purchase checklist for EPCs, CPOs and site owners preparing a 150kW DC fast charger project.
Request a 150kW site-readiness review
Send voltage, transformer capacity, cable distance, site layout, connector and OCPP requirements before finalizing the charger model.
Short answer
A 150kW DC fast charger typically needs three-phase AC input, transformer and grid capacity sized from the selected model's maximum AC input kVA and current, concurrent site loads and the local engineer's design margin, correctly sized cabling and protection, a level load-bearing foundation, adequate ventilation clearance, vehicle protection and a stable data connection for OCPP. Exact current, cable size and clearances depend on the model, input voltage and local electrical code.
| Requirement | What to confirm | Why it matters |
|---|---|---|
| Three-phase supply | Voltage, phase, frequency and available service capacity | 150kW output is not viable on single-phase power. |
| Transformer/grid capacity | Available kVA and headroom above charger input | Input draw exceeds output after losses and site loads. |
| Breaker and protection | Input current, upstream breaker, SPD, RCD/RCM and earthing | Undersized protection causes trips, heat or safety risk. |
| Cable sizing | Run length, conductor cross-section and voltage drop | Long runs may require larger conductors. |
| Metering | Utility meter and certified meter if billing by kWh | Public/billed sites often need metering compliance. |
| Communications | 4G/LTE, Ethernet, SIM/APN, VPN or static IP needs | OCPP and remote operation need stable connectivity. |
Civil and foundation requirements
Plan a level plinth or foundation sized for the cabinet weight and dimensions, cable trenching, ducting, drainage, bollards or wheel stops, correct mounting bolts and service access. Civil work is often the slowest part of the schedule, so do not wait until the charger is ready to ship.
Clearance, cooling and outdoor exposure
Air-cooled 150kW cabinets need unobstructed intake and exhaust clearance. Outdoor sites should check IP rating, rain exposure, sun load, ambient temperature and altitude derating. In hot climates, ask for the derating curve by model so the charger does not underperform at peak temperature.
Installation-readiness checklist
- Three-phase supply confirmed at the site.
- Transformer capacity checked against charger input plus other site loads.
- Utility application or grid upgrade process started if required.
- Cable route, distance and conductor sizing confirmed by local code.
- Earthing, RCD/RCM and surge protection specified.
- Foundation, drainage and vehicle protection planned.
- Service clearance and cooling airflow reserved.
- 4G/LTE or Ethernet connection tested at cabinet location.
- OCPP version, target CSMS and payment workflow confirmed.
- Destination market certificates and inspection requirements listed.
Site data to send for a model-matched specification
Buyer mistakes to avoid
Do not order the charger before confirming transformer capacity, cable route, cooling clearance and communications. Do not assume a 150kW output rating means exactly 150kW of grid input. Do not ignore metering and payment rules if the site is public or billed.
How SUNFULL helps
SUNFULL can review site information and match it to the right 150kW model, connector, OCPP/payment scope and document path. For serious projects, send electrical drawings or a site sketch so the quotation and installation checklist can be aligned.
Not sure whether your site can support 150kW?
Send transformer capacity, cable run, parking layout and target connector. We can suggest the right 150kW charger configuration and site questions.
Buyer FAQ
What power supply does a 150kW DC charger need?
A three-phase AC supply. Exact voltage, current and breaker size depend on the model and destination market.
How much transformer capacity does a 150kW charger need?
Size the transformer from the selected model's maximum AC input kVA and current, concurrent site loads and the design margin required by the local engineer. Do not use 150kW as a fixed transformer-size rule.
Can a 150kW DC charger be installed outdoors?
Yes, with an outdoor-rated model, correct foundation, drainage, vehicle protection and cooling clearance.
What civil works are required?
Foundation or plinth, trenching, ducting, drainage, bollards or wheel stops, cable entry and service access.
Does a 150kW DC charger need OCPP?
If the site needs remote monitoring, payment, CPO operation or reporting, specify OCPP version and target CSMS before ordering.
How far can the charger be from the power supply?
It depends on voltage drop, current, conductor size and local code. Longer cable runs normally require larger conductors.