After receiving several quotes for battery swap cabinets, you still don't know where the difference lies: they all claim to be source factories, all say batteries are compatible, all say delivery is no problem. The real differences only show after installation—compartment doors don't close tightly, scanning codes on rainy days takes several tries, repairs go unanswered, and electricity and O&M costs are higher than initially calculated.
These are not cases of bad luck; they are things that were not checked at the factory-selection stage. Battery swap cabinet manufacturers fall into three categories—source factories that build and sell cabinets themselves, operating brands that set up their own sites and charge monthly fees, and traders who only resell goods. If you buy cabinets to operate yourself, the only track that counts is cabinet manufacturing. Once the track is clear, check item by item across six areas: compliance, manufacturing, after-sales, compatibility, platform ownership, and cost.

Three types of sellers are indistinguishable, price comparison is meaningless

The difference between the three types of sellers is not size, but what they make money from.
Source factories have their own factories, build and sell cabinets, and earn money from equipment and solutions. Operating brands set up their own sites and collect monthly fees, selling battery swap services, not the equipment itself. Traders do not produce; they resell or rebrand, and their quotes are often lower.
To distinguish sellers, three questions are enough: Is the cabinet produced in your own factory? Who owns the platform and data? Is the contract signed with the manufacturing entity or the operating entity? The third is most often overlooked—once the contracting entity is misaligned, accountability becomes more complicated. There are also two categories that are not the same thing at all: car battery swap stations and commercial & industrial energy storage cabinets differ greatly in form and purpose, and their parameters and quotes cannot be compared together.

Certification without a number is equivalent to no certification

When you hear 'our entire line has passed 3C', first ask: Is it the cabinet or the battery?
The battery swap cabinet itself is not in the CCC mandatory certification catalog; the cabinet corresponds to CQC voluntary certification. Lithium-ion batteries for electric bicycles have implemented 3C mandatory certification; from November 1, 2025, uncertified products may not leave the factory for sale. These two concepts are easily confused; asking clearly whether they mean the cabinet or the battery is more useful than hearing 'has passed 3C'.
Verification looks at numbers, not a statement that 'certification has been passed'. For ISO 9001, check the registration number, whether the scope covers battery swap cabinets, and the validity period; for CE, check the number and covered models; product type test reports should be tested in full according to GB/T 42236.1-2022, and the issuing institution must have CMA or CNAS qualifications—this is a recommended national standard, not mandatory, but a report number that can be requested carries more weight than the words 'compliant with national standard'. When requesting, only when the report number, testing institution, sample model, and conclusion page are all present does it count.
Daochong Technology's publicly verifiable number: ISO 9001 registration number 399234Q26620R5, with coverage including battery swap cabinets, valid until 2027-09-19, dual accreditation by IAF and CNAS; CE number LCSA1274034E, covering 8 models in the DC14 series.

Only when the factory and production line are visible can delivery times be written into the contract

"Factory direct sales" and "source factory" are terms repeatedly mentioned in the procurement process, and they are also the easiest to distort. Typical signs of distortion: cannot say where the factory is, cannot say the monthly output, and delivery times rely on "roughly."
Ask for three numbers: where the factory is and how big it is; how many units it produces per month; and how many working days from order to delivery. If the three numbers are consistent with each other, scheduling is in their own hands; if they only give a delivery window and avoid area and monthly output, scheduling is not with them. If they are consistent, the delivery date has the confidence to be written into the contract; if not, the delivery date can only remain verbal.
Factory audits depend on whether processes can be seen. The three stages—sheet metal, assembly, and aging testing—should at least have production line footage; incoming material inspection, aging duration and sampling ratio, and the pre-shipment mandatory inspection checklist should be available in documented form. Those who refuse factory audits can basically be ruled out.
Structural components are worth dismantling on the spot: check whether the compartment opening is reinforced, whether the guide rails are aluminum alloy or plastic, and whether the hinges use spot welding plus screws or only snap fasteners. Daochong uses an arched compartment opening with three layers of reinforcing ribs, rated to withstand 50kg impact. These determine whether the compartment door will still close properly in three to five years—high and low temperatures and humidity can deform cabinet doors, a common problem with outdoor cabinets.

How soon someone answers after a repair request is more practical than 'good service'

A battery swap cabinet is revenue-generating equipment that runs outdoors long-term; one day of downtime means one day less revenue. After-sales judgment does not rely on adjectives but on three time commitments that can be written into the contract: how long to respond, how long to arrive on site, how long to ship common spare parts—if any one is missing, the after-sales column cannot be compared horizontally. Industry research shows satisfaction is only 72 points, with customer service response speed at 62 points, the lowest among all dimensions.
Besides timeliness, ask four more things: which components the warranty covers (the whole machine and core components often do not share the same number of years), whether software maintenance is charged, whether a spare parts price list can be provided, and whether there is a local service point. "Headquarters supports the whole country" and "there is an engineer in your city" are two different things.
There is another place where it is easy to lose out: "response time" in a contract has at least two interpretations—whether response starts when the phone is answered, or when the engineer sets out. The same phrase "24-hour response" means only that someone answers the phone in the former case, while the latter involves someone actually heading your way. Have them define this term clearly.

Whether it can accommodate your battery—only letting them try it once will tell

Compatibility issues usually surface after the cabinet is installed: batteries won't fit, protocols don't communicate, only certain voltage ranges can be charged, and the number of fully charged compartments is inaccurate. These all count as 'usable', but none are easy to use.
Check four items in the parameter table: input voltage range, output voltage and compatible battery voltage, single compartment dimensions and load capacity, charging interface type. Take Dochion as an example: 220V input (176–264V), output 43–88V, compatible with 48V/60V/72V, single compartment load 40kg, 2+6 interface.
Matching parameters does not mean it's usable. Whether cross-brand batteries can be installed must be tested: bring a battery in use for a compartment loading test, or ask an engineer to test on site with your battery. Check four things—whether it can identify the battery, whether BMS data can be read, whether full-charge detection is accurate, and whether swap records can be exported.
You need to raise this item yourself; do not wait for the other party to introduce it. Those willing to arrange it show confidence in their own protocol stack; those who only verbally guarantee that "all standard protocols are supported" and refuse actual testing—mark this item with a question mark for now.

Whose server the data is on determines how big you can grow

If you are starting your own operation, before signing there is one thing you must clarify: who ultimately owns the data—sites, users, orders—on whose server it ends up. Agency permissions, user assets, and pricing authority all depend on how this step is signed.
Ask four things: whether private deployment is possible (servers and mini-programs under your own brand name), whether data is isolated between agent accounts, where the boundary lies between OEM branding and agent development, and how data will be delivered when the cooperation ends.
Daochong can deploy servers under an independent brand, that is, private deployment; there is no upper limit on the number of OEM brands or agents, and data is isolated between agent accounts. This item is generally not visible on a quotation sheet and must be asked about separately—if you plan to start your own operation, treat it as a procurement item as important as the cabinet itself.

A cheap cabinet per unit often becomes more expensive after three years

The difference in per-unit quotes is visible, but electricity, maintenance, and downtime costs grow slowly later. Cost should be calculated across four items: purchase price, electricity, maintenance, and downtime loss.
Electricity costs depend on the charger; PFC value, mains conversion efficiency, and overall cabinet power are the three key levers. Dochion's potted charger PFC value ≥0.96, mains conversion efficiency ≥92%, rated to save 3–5% electricity compared with ordinary solutions. These three parameters can be compared directly on the specification sheet; you do not need to wait until installation to find out.
Maintenance depends on structure. For modular, front-maintenance cabinets, replacing a compartment control board is an on-site parts swap; returning the whole cabinet to the factory requires accounting for disassembly, assembly, and transport. Downtime losses are the easiest to overlook: mark the manufacturer's service outlet list on your own site map and measure the distances—that is more concrete than listening to "nationwide service." Common questions

Q: What are the main types of battery swap cabinet manufacturers?

A: Three types. Source factories build and sell cabinets themselves; operating brands set up sites and collect monthly fees, selling battery swap services; traders do not produce, but resell goods or rebrand and resell. If you buy cabinets for self-operation, go with the cabinet-building track.

Q: How can I tell whether a company is a real factory?

A: Ask for three visible things—production line footage, aging test process, and factory inspection checklist—then ask for the factory address and monthly output. Those who refuse factory inspections can basically be ruled out.

Q: The manufacturer says private deployment is possible. How do I confirm?

A: Check whether the contract specifies server ownership and data ownership, ask for a deployment checklist (server, domain, mini-program entity), and then ask "how will data be delivered after the cooperation ends?"

If the order is reversed, everything that follows is remediation

First ask for the type test report number and testing institution, then the factory address and monthly output, and only then ask for the price. If they can't answer the first two, don't bother negotiating even if the price is low—quotes can change anytime, but numbers and factory addresses cannot.
If the contract is signed but the cabinet installation is not complete, the main contract terms likely cannot be changed, but supplementary agreements and acceptance forms can still be added: how soon engineers arrive, how many days for common spare parts to be shipped, and how platform data will be delivered upon termination. If the other party refuses to sign even a supplementary agreement, don't miss these three points at the next site.