Warranty and service contracts on fleet chargers
Parts and labour, for at least as long as you are financing the asset, plus a separate written service obligation that defines how uptime is measured, what is excluded, how fast someone responds and what you get when they miss. An uptime percentage with no measurement method and no remedy is decorative — it costs the vendor nothing to promise and gives you nothing to enforce. And ask the year-four question before you sign anything: once the installer has been paid and gone, who holds the network contract, who stocks the parts, and who do you call?
Updated 2026-08-20

Three contracts, usually sold as one number
Charging proposals bundle three separate obligations into a single line and the bundling is where the gaps hide. The hardware warranty is the manufacturer promising the equipment is not defective. The service contract is somebody promising to come and fix it, which is a different party and a different promise. The network subscription is a software service, and on many products it is also the thing that makes remote diagnostics and load management work at all — which means a lapsed subscription can degrade a charger you own outright. Ask for the three priced separately, ask who the counterparty is on each, and ask what each one does when one of the others expires.
Parts and labour, and why labour is the number that matters
A parts-only warranty on equipment mounted in a yard is worth much less than it sounds. The failed component may be inexpensive; the technician, the truck, the travel time and the second visit when the wrong part was shipped are not. So the first question is whether labour and travel are included, for how long, and whether that coverage is from the manufacturer or from a local service company who has actually agreed to it. The second question is cables. Cable assemblies are the highest-wear item on a depot charger and they are frequently excluded from warranty as a wear part. That may be reasonable, but you need it priced: get the replacement assembly cost and the lead time in writing at purchase, and confirm the cable is field-replaceable at all, because on some products a damaged cable is a dead unit.
Uptime needs four parts or it means nothing
Write these four into the contract and an uptime clause becomes enforceable. Leave any one out and it does not. First, measurement: what counts as available, whose data decides, over what averaging period, and whether the number is per port or across the site — a site average lets one permanently dead port hide behind nineteen healthy ones. Second, exclusions: utility outages, vandalism, vehicle-side faults and a scheduled maintenance window are all reasonable, but an exclusion for 'parts availability' or 'supply chain' quietly excludes the most common real cause of a long outage. Third, response tiers, defined as clock times from a defined start. Fourth, a remedy with money in it. Service credits that never exceed the monthly fee are a weak remedy but they are still a remedy; an escalation path plus a termination right for repeated failure is stronger.
Parts availability is the real cause of long outages
Most multi-week charger outages are not diagnostic failures. Somebody knows exactly what is wrong and the part is six to twelve weeks out, or the product revision has changed and the replacement board is not compatible, or the manufacturer has moved on from that model. So ask supply-chain questions during procurement, when you still have leverage. Where are spares stocked and how far is that from your yard. What is the committed lead time on the three highest-failure components. Will you sell me an on-site spare kit, and what is in it. What notice do you give before a model goes end-of-life, and for how long after that do you commit to supply parts. A vendor with good answers will give them readily. A vendor with bad answers will talk about uptime percentages instead, which is worth noticing.
Spare ports are the cheapest uptime you can buy
Before you buy an expensive service tier, consider buying availability directly. If your depot needs twenty ports for twenty vehicles, then one dead port is one vehicle that did not charge, and no contractual remedy fixes a missed dispatch. Two extra ports mean a fault is an inconvenience rather than an incident. The cost is knowable: national depot Level 2 runs roughly $3,500 to $15,000 per port installed, and the marginal cost of adding ports to a build that is already trenched, with pads poured and panel headroom in place, sits at the bottom of that range rather than the middle. Compare that one-time figure against ten years of premium service tier and against what a missed morning dispatch costs you — a number only you can supply.
The year-four question
Here is the situation to plan for. The installer was paid at commissioning three years ago and no longer has a relationship with your site. The network agreement was signed by that installer on your behalf, so the software vendor's customer of record is a company that has moved on. Your original warranty has expired, the extended coverage was never bought because it was not in the capital budget, and the person who managed the project has changed jobs. A port fails and nobody in your organisation knows who to call. Prevent it with three clauses at purchase. One: the network agreement is assigned to you at acceptance, in your name, with the renewal price stated. Two: the service obligation names the servicing company, not just the seller, and survives a change of installer. Three: as-built documentation, network administrator credentials, commissioning results and equipment serial numbers are delivered as a condition of final payment. That third one costs nothing and is skipped constantly.
What to price over ten years
Depot chargers are usually evaluated on installed cost and operated for a decade, which means the recurring lines decide the real number. There are four: the network subscription per port per year and its renewal price after the initial term, the service contract or extended warranty premium, the expected spend on wear parts — cables above all — and the labour cost of whatever the service contract excludes. We do not publish market rates for any of them because they vary enormously by product and region and the figures that circulate are not sourced well enough to print. What we can tell you is which numbers to demand in writing before you sign, and that the renewal price after the initial term is the one most often left blank. Ask for it as a stated price or a capped escalation, and treat a refusal as the answer it is.
One thing that is not on the table
There is no federal tax credit to soften any of this. Section 30C terminated for property placed in service after June 30, 2026, and that included the business provision, so charging equipment bought today carries no federal credit and neither does a service agreement. Utility programs are the only incentive layer left and some of them attach conditions that touch this article directly — reporting requirements, listed-equipment requirements, and in some cases a minimum operating or uptime commitment as a condition of the money. If you are taking utility funding, read those obligations before you negotiate your service contract, because the utility's requirement may be stricter than the one your vendor was going to offer.
How long should a fleet charger warranty be?
At minimum as long as you are financing or depreciating the asset, and covering labour and travel rather than parts alone. A parts-only warranty on yard-mounted equipment leaves you paying for the expensive half of every repair, and the technician visit is usually the expensive half.
Is 99% uptime a good commitment?
It is meaningless until you know how it is measured, what is excluded and what happens when it is missed. Ninety-nine percent measured as a site average across twenty ports tolerates one port being dead permanently. The same number measured per port, per month, with parts delays inside rather than outside the clock, is a real obligation.
Are cable assemblies covered by warranty?
Often not — they are commonly classed as wear items, which is defensible given how they are treated in a yard. What matters is that you know it before purchase, that you have the replacement price and lead time in writing, and that you have confirmed the cable is field-replaceable rather than integral to the unit.
Who should hold the network contract, us or the installer?
You. An installer who signs the network agreement on your behalf is the software vendor's customer of record, which is a problem the day that installer is no longer involved with your site. Require assignment of the agreement into your name at acceptance, with the renewal price stated.
Should we buy preventive maintenance visits?
For a depot, usually yes, and cheaply — the useful visits are inspection of cable assemblies and connectors, torque checks on terminations, enclosure and seal condition, and confirmation that the load-management settings are still what commissioning recorded. That last item catches configuration drift, which is a common cause of a depot quietly under-delivering overnight.
Price the build, spare ports included
Adding a position to a trench you are already opening is the cheapest availability you can buy. Put both port counts in and see what the difference actually costs.