Before buying a fast charger, confirm the power the site can actually receive

The equipment quote cannot answer the supply question

A business owner in a saved Reddit discussion considering charging providers wanted a good customer experience, while other prospective operators focused on charger purchase prices. Both discussions need an earlier question: can the property receive the required electrical supply in the intended location and timeframe? DC equipment can impose a substantial new site load. The purchase price cannot determine whether an existing service, utility transformer, or proposed route can support it.

Source: Business owner considering EV charging network providers - INPUT REQUEST

Start with charger input and aggregate site demand

DOE recommends early utility coordination, and PG&E's construction process separates project design from energization. Start with the exact charger's input requirements, not only its advertised output. The electrical design must also account for existing site loads, simultaneous stations, auxiliary equipment, and operating controls. Three-phase availability, voltage, equipment configuration, and the utility's supply review can materially affect feasibility. No universal service size fits every DC installation.

Source: Alternative Fuels Data Center: Procurement and Installation for Electric Vehicle Charging Infrastructure · Building & Renovation | PG&E

A cabinet ordered before supply review can force redesign

Illustrative scenario: a property owner obtains a favorable price for two charging cabinets before utility review. The selected units require an input arrangement unavailable at the planned service. A revised design might need additional transformation, a different service location, or different equipment. The discount is no longer meaningful if it creates redesign, storage, cancellation, or civil costs. A conditional procurement milestone would have exposed those issues before the order became difficult to change.

Send a complete utility feasibility package

Prepare a preliminary site package with the proposed equipment, aggregate demand, operating hours, conceptual layout, existing service records, and expansion plan. Ask the utility which review path applies and what information is required to establish supply conditions. Confirm whether the project needs easements, a transformer location, underground work, or changes affecting adjacent property. Keep customer-side and utility-side cost responsibilities visible in the budget.

Reassess customer dwell when power is constrained

Use a feasibility decision before final procurement: proceed as designed, reduce or manage the initial power, phase the project, relocate equipment, or choose a different charging use case. A lower power limit may preserve feasibility but change customer dwell and revenue assumptions. Recalculate the business model rather than treating the reduced limit as a harmless engineering adjustment. Likewise, a future expansion allowance should not be sold as reserved utility capacity.

Set a procurement gate that names the remaining unknowns

Before releasing a major equipment order, put the critical assumptions on one page: selected input configuration, intended site operating limit, proposed service location, existing-load information, utility review status, and responsibilities for any required transformation or civil work. Mark which items are confirmed and which are provisional. A favorable equipment quotation can remain useful during feasibility, but the owner should understand whether accepting it commits the project before those assumptions are resolved. Review cancellation, substitution, storage, and delivery terms with the purchasing team rather than assuming a later redesign will be cost-neutral.

Reconcile permitted supply and commissioned limits

The final construction package should reconcile the selected equipment with approved service conditions and permits. Track equipment delivery separately from utility completion. Commission power sharing and site limits after energization, and document who can change settings. The owner should receive evidence that the installation can operate as planned, not just proof that expensive cabinets have arrived.

Where PG&E Rule 29 changes the construction budget

PG&E’s EV Power Ready pathway under Electric Rule 29 serves qualifying new, separate, dedicated EV charging services. PG&E describes designing, installing and maintaining the connection from its distribution system to the meter panel; the customer purchases and installs the charging stations. The program excludes single-family residences and requires the customer to own and operate the chargers for at least five years. Confirm the project’s eligible work and conditions in writing.

This is a defined service-extension pathway, not a promise that an entire charging project is free. Keep the utility agreement beside the customer construction scope and identify who provides the meter-panel work, downstream distribution, trenching, foundations, permits and site restoration. Do not move a cost to PG&E’s column merely because it is outdoors or upstream of a cabinet.

Source: PG&E: EV Power Ready, Electric Rule 29 service pathway

What operating before a capacity upgrade can mean

PG&E’s Flex Connect program can allow a constrained site to operate using available capacity while grid upgrades proceed. Participation requires utility assessment, an agreement and a compatible control integration. Its DC fast-charging fact sheet describes forecast hourly capacity limits sent to the site controller ahead of operation, with IEEE 2030.5/CSIP integration and PG&E interoperability testing. The design must address communication loss and stored default limits.

The preliminary capacity heatmap is an estimate, not guaranteed delivery. PG&E identifies the Service Planning load limit as the guaranteed floor. Test the business case at that floor and at plausible constrained hours, not only at the attractive average case. Reduced aggregate power can lengthen visits or create queues even while every charger is electrically functional. Confirm that the selected vendor can implement the required controls before placing an equipment order.

PG&E’s January 2026 fact sheet describes enrollment by order of application, normally limited to one site per feeder. Its note that no native plug-and-play charging-management vendor was available as of December 2025 is historical, not a verified current vendor list. Confirm the site’s enrollment and the proposed integration pathway directly with PG&E.

Source: PG&E: Flex Connect program fact sheet for DC fast charging · PG&E: Flex Connect preliminary load analysis, guaranteed floor versus estimated capacity

Put it into practice

A decision table to keep handy