Education Center / Which Volt Vault is Right for Your Fleet
Blog
Category: Electric Charging
Which Volt Vault is Right for Your Fleet
Most EV charging decisions start with a simple goal: get the fleet charged and keep it moving. But the path to getting there looks different depending on where you operate, what you’re driving, and how much control you want over your energy costs. Volt Vault was built around that reality. The lineup includes five units spanning two distinct approaches to EV charging, each designed to fit a specific set of fleet conditions rather than asking your operation to adapt around them.
Gaseous Fuels or Low-Power Grid Connection? Here’s the Difference:
Not all EV charging solutions are built the same way, and that difference matters more than most fleet operators realize.
Traditional EV charging infrastructure connects directly to the electrical grid. That means before a single vehicle charges, your site typically needs a utility upgrade. Those upgrades take anywhere from nine to 24 months and often involve significant construction costs that aren’t always visible in the initial budget.
Volt Vault units Classic Level 2, Classic Level 3, Flex, and Lite take a fundamentally different approach. Rather than drawing power from the electrical grid, these models generate electricity on-site using natural gas, compressed natural gas (CNG), renewable natural gas (RNG), or propane. That means your existing site infrastructure doesn’t need to change. There’s no utility upgrade to schedule, no queue to wait in, and no demand charges or time-of-use pricing layered on top of your fuel costs.
Because the gas-powered models generate their own electricity, they operate entirely off-grid. Power outages don’t affect charging schedules and deployment is not limited by grid capacity. Overall deployment takes roughly four months, including manufacturing, commissioning, and permitting, compared to the years-long timelines associated with traditional infrastructure.
That independence is the core differentiator: you’re not asking the grid for permission to charge your fleet.
The 400squared™ model takes a different approach. Powered by ElectricFish’s battery-integrated technology, it takes low power grid energy and stores it to later be dispensed at up to 400kW, making it a strong option for fleets that need ultra-fast charging speeds or want to explore grid services. For fleets navigating demand charges associated with grid-tied battery recharging, the 400squared™ is designed to give operators more control over how and when energy is drawn—helping reduce reliance on utility-dictated terms.
Both approaches eliminate the need for electrical infrastructure upgrades at your site. The right choice comes down to charging speed requirements, fuel access, and whether battery-backed grid services are part of your energy strategy.
Find Your Fit
Not every fleet charges the same way. Some run overnight routes on tight schedules. Others operate in locations where grid access is limited or unreliable. Choosing the right unit isn’t just about power output; it’s about matching the technology to how your fleet actually operates. Volt Vault offers five units, each built for a different set of fleet needs.
Volt Vault Classic—Level 2
Sixteen ports at 9.6kW each. Designed for last-mile delivery fleets that charge overnight and need every vehicle ready to roll by morning. View spec sheet.
Volt Vault Classic—Level 3
Two ports with up to 87.5kW per port. Built for medium- and heavy-duty trucks that need fast turnaround between runs. View spec sheet.
Volt Vault Flex
A hybrid configuration with six to eight Level 2 ports and two Level 3 ports. The right fit for mixed fleets that run both light- and heavy-duty vehicles from the same depot. View spec sheet.
Volt Vault Lite
A compact, trailer-mounted Level 3 unit with two ports at up to 30kW each. At 9,500 lbs and 22 feet long, it can be towed by a mid-sized truck—making it the most mobile option in the lineup. View spec sheet.
Volt Vault 400squared™ (Powered by ElectricFish)
Two ports at up to 200kW each. Designed for ultra-fast charging, backup energy resources, and grid services. Best suited for fleets with high-power demands or those looking to participate in demand response programs. View spec sheet.
| Feature | Lite | Classic-Level 2 | Classic-Level 3 | Classic-Flex | 400squared |
|---|---|---|---|---|---|
| Primary Use Case | Remote locations, short-term deployments and pilot programs | Overnight charging for delivery fleets | Fast charging for high-demand fleets | Mixed fleet charging (L2 + L3) | Low power, grid-connected fleet charging with demand charge reduction |
| Charging Type | Level 3 | Level 2 | Level 3 (DC Fast Charging) | Level 2 + Level 3 | Level 3 (battery buffered) |
| Simultaneous Charging | Up to 2 vehicles | Up to 16 vehicles | Up to 2 vehicles | 6-8 (Level 2) + 2 (Level 3) | Up to 2 vehicles |
| Power Output (per port) | Up to ~60 kW | 9.6 kW | Up to ~175 kW | L2: 9.6 kW L3: ~24-40 kW | Up to 400 kW |
| Energy Source | Natural gas (conventional or renewable) or Propane | Natural gas (conventional, compressed, renewable) or Propane | Natural gas (conventional, compressed, or renewable) | Natural gas (conventional, compressed, or renewable) | Grid electricity with integrated battery storage |
| Onboard Fuel Storage | No | No | No | No | Yes |
| Onboard Batteries | No | No | No | No | Yes |
| Footprint (L x W x H) | 22’ x 8.5’ x 10’ | 40’ x 8’ x 11’ | 40’ x 8’ x 11’ | 40’ x 8’ x 11’ | 11’ x 5’ x 6’ |
| Mobility | Towable by pickup truck | Redeployable (requires transport) | Redeployable (requires transport) | Redeployable (requires transport) | Semi-permanent installation |
| Deployment Time | ~4-5 months after receipt of order | ~4-5 months after receipt of order | ~4-5 months after receipt of order | ~4-5 months after receipt of order | ~4-5 months after receipt of order |
Ready to confirm your match? Reach out to the Volt Vault team today to start charging sooner.
Frequently Asked Questions
Which Volt Vault Is Best for a Last-Mile Delivery Fleet?
The Volt Vault Classic, Level 2 is built for last-mile delivery fleets that operate during the day and charge overnight. It offers up to 16 ports at 9.6kW each and runs off-grid, so outages and brownouts won’t disrupt your charging schedule.
What’s the Difference Between the 400squared and the Other Volt Vault Units?
The Volt Vault 400squared powered by ElectricFish is a battery-integrated, grid-connected system that delivers 400kW ultra-fast charging and supports backup power and grid services. The Classic, Flex, and Lite units generate power on-site from natural gas or propane and run fully off-grid.
Which Volt Vault Should I Choose for Heavy-Duty Trucks?
For fast charging of medium- or heavy-duty trucks, the Volt Vault Classic, Level 3 delivers up to 175kW across two ports. It is scalable and off-grid, making it a strong fit for fleets that expect to grow.
Can One Volt Vault Charge Both Level 2 and Level 3 Vehicles?
Yes. The Volt Vault Flex combines Level 2 and Level 3 charging in a single unit, making it ideal for mixed fleets with varied charging needs now and in the future.
How Quickly Can a Volt Vault Be Deployed?
Volt Vault units can be on-site and ready to charge in about four months, including manufacturing, commissioning, and permitting—far faster than the 9-to-24 months traditional EV infrastructure often requires.
