Adding 280 new DC fast charging stalls makes a straightforward growth story.
But EVgo’s second-quarter 2026 results contained another number: 175. That was the number of legacy equipment removals reported under its ReNew program during the same quarter.
New charging capacity was being added while older equipment was being taken out.
Meanwhile, EVgo’s reported total reached 5,380 operating charging stalls, up 24% year over year. This was clearly not a network that had stopped expanding. These figures were disclosed in EVgo’s second-quarter 2026 results.
Why purchase new equipment while retiring equipment that is already installed?
ReNew addresses more than one issue. According to EVgo’s description of the program, it includes preventive maintenance, diagnostics, upgrades, replacements and, in some cases, retirement. Site assessments also consider customer demand, local technical constraints and nearby charging options. The 175 removals therefore cannot be attributed to a single type of fault or maintenance difficulty.
Nevertheless, the combination of expansion and retirement raises a useful question for anyone purchasing charging equipment:
How will the charger you buy today be maintained in the years ahead?
The Purchase Price Is Only the First Line on the Bill
During procurement, it is relatively easy to compare purchase price, power output, connectors and appearance.
These specifications are clear. They fit neatly into a comparison table.
Other differences become visible only after the equipment enters service and needs attention.
Can the maintenance team narrow down the problem before travelling to the site? Can the technician bring the right replacement part on the first visit? Is the component accessible? What checks are required before the charger can return to service?
These may sound like after-sales questions, but an after-sales team does not control every answer.
The internal layout, component connections, available diagnostic information and choice of replaceable units can all affect the difficulty of maintenance work.
Some maintenance costs begin taking shape long before a repair quotation is issued. They begin with the way the equipment is designed.
The Operator’s Clock Stops Only When Charging Restarts
For a technician, the immediate task is to identify and resolve the fault.
For the operator, another clock is running: how long has this charging stall been unable to serve customers?
In a repair process that requires multiple site visits, delays can accumulate between the actual maintenance tasks. An initial inspection may be followed by confirmation of the required part, a wait for delivery and another visit to complete the work.
The hands-on repair may not be particularly complicated. The time between those steps can still extend the outage.
During a busy period, an unavailable stall may also place more pressure on the remaining chargers. Drivers do not distinguish between equipment waiting for diagnosis, a spare part or a technician.
They see one result: they cannot use it now.
Maintenance efficiency therefore cannot be measured only by the time a technician spends working on the equipment. It also depends on what happens between the loss of service and its restoration.
That leads to a more specific question:
Does restoring charging service always have to wait until the original faulty component has been repaired?
Restore the Charger. Repair the Component Separately.
For faults that can be addressed by replacing an identified faulty unit, these two tasks can follow separate paths.
Restore the charger’s ability to serve customers first. Repair the removed component afterwards.
This is one practical way to understand the role of the Programmable Power Controller, or PPC, used in Injet Ampax DC fast chargers. Its integrated design reduces internal wiring complexity and supports a defined approach to servicing and replacing the PPC unit.
<img
src=”https://www.injetenergy.com/uploads/9f4cc67d.png”
alt=”Internal layout of an Injet Ampax DC fast charger, showing the PPC controller and separate charging power modules”
loading=”lazy”
decoding=”async”>
Injet Ampax internal layout, showing the PPC and charging power modules. Product illustration supplied by Injet New Energy.
For faults confirmed to involve the PPC and suitable for unit replacement, the maintenance process can begin with remote diagnosis.
Using the diagnostic findings, trained personnel who meet local requirements can arrive with the appropriate replacement unit. They carry out the replacement and required checks under the prescribed safety procedures. Once the equipment meets the conditions for safe operation, charging service can resume.
The removed PPC then enters a separate repair process.
The operational benefit is not simply that a component can be replaced.
It is that on-site service restoration does not have to remain tied to repairing the original faulty component. The charger can return to operation while work on the removed unit continues elsewhere.
This does not mean every charging fault can be resolved by replacing the PPC. Nor does a component’s replacement time determine the full duration of an outage. Fault type, diagnostic findings, spare-part availability, technician scheduling and site conditions still affect the outcome.
The value of this approach is a practical recovery path for applicable faults—not a promise that equipment will never require attention.
Make Maintainability Part of the Buying Decision
Once maintenance is considered at the procurement stage, the comparison between chargers becomes more useful.
Alongside “How much power can this charger deliver?”, ask: “What information will help the maintenance team identify a problem?”
Alongside “What is the purchase price?”, ask: “Which units can be replaced, who supplies the spares and what conditions must be met on site?”
Alongside “How long is the warranty?”, ask: “Will there still be a clear, workable maintenance process after years of operation?”
These questions may be less prominent than a power rating, but they are directly relevant to the workload and cost of keeping equipment in service.
For a manufacturer, supporting long-term operation is therefore about more than answering a service call quickly.
It also means reducing unnecessary maintenance complexity during design, explaining service boundaries at handover and connecting diagnostics, spare parts, replacement procedures and testing into a complete process.
Injet’s PPC approach provides a concrete example of how those considerations can be built into the equipment and its maintenance workflow.
Today’s New Chargers Will Need Tomorrow’s Maintenance
EVgo’s ReNew program does not establish that all older equipment should be replaced. It also does not suggest that any single technology can eliminate the need for retirement.
What it does illustrate is that network expansion and the management of existing equipment happen at the same time.
The chargers being installed today will also enter a long-term maintenance cycle. When that happens, the operating team’s workload will depend not only on the equipment’s age, but also on how it was designed, selected and supported.
Asking “What happens when it fails?” before buying an EV charger is not a sign of lacking confidence in the product.
It is a way to evaluate how the investment will work beyond its first successful charging session.
Getting a charger into service depends on successful delivery. Keeping it manageable over the years requires decisions that begin much earlier—with design and procurement.