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01 / OVERVIEW
EV charging locations often face a mismatch between charger capacity and available electrical service. Fleet depots, equipment yards, dealerships, temporary charging sites and new charging stations may require high power for short periods, while the existing utility connection is sized for a much lower sustained load.
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Where electrical capacity is limited, operators may need to restrict simultaneous charging, reduce charger output, wait for a utility upgrade or rely on an oversized generator. These constraints can delay deployment and make it harder to respond to changing charging demand.
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ChargeHives™ provide mobile battery capacity for compatible EV charging equipment. The system can recharge from available utility service, a generator or renewable generation, then supply additional power when charging demand exceeds the available source.
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This allows charger capacity to be deployed without requiring the upstream power source to continuously support the maximum charging rate. It can also provide temporary charging capacity while permanent electrical infrastructure is being completed.
Figure 1: CCS1 DC Fast Charging Dual-Ports
02 / DEPLOYMENT
How ChargeHives™ Are Deployed for EV Charging
ChargeHive™ deployment is based on the available power source, charger configuration, vehicle schedule and daily energy requirement. The system can be configured around three common charging conditions.
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Limited Utility Power: ChargeHive™ supplements an existing electrical service when the available connection cannot support the full charger load. The battery recharges when site demand is lower and supplies additional power during higher-rate or simultaneous charging sessions.​
Best suited for: Fleet depots with limited service capacity, dealerships, temporary charging locations, constrained commercial properties and sites awaiting transformer or utility upgrades.
Generator Hybrid: A smaller generator supplies sustained charging demand and recharges the ChargeHive™ when capacity is available. The battery supports higher charger output and changing vehicle demand while allowing the generator to operate for fewer hours and within a more efficient loading range.
Best suited for: Remote fleet operations, construction equipment charging, off-grid vehicle testing, emergency deployments and temporary charging sites without sufficient utility service.
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Stand-Alone Mobile Power: A precharged ChargeHive™ supplies a defined charging period or quantity of vehicle energy without an operating generator at the point of use. The unit can be recharged at a depot, from an available electrical connection or between scheduled deployments.
Best suited for: Demonstrations, events, temporary fleet support, vehicle commissioning, overflow charging and locations where generator noise or emissions are undesirable.
Limited Utility or Site Power
GRID-SUPPORTED CONFIGURATION
SITE POWER
CHARGEHIVE
EV CHARGING
ChargeHive supplements available site power when the existing service cannot support the full charger load or simultaneous sessions.
BEST FIT
Fleet depots, dealerships and constrained sites
Generator-Hybrid Charging
HYBRID CONFIGURATION
GENERATOR
CHARGEHIVE
EV CHARGING
A smaller generator supplies sustained charging & recharges the ChargeHive. The battery supports higher charging rates and generator off-periods.
BEST FIT
Remote fleets, equipment charging and temporary sites
Stand-Alone Mobile Charging
BATTERY-ONLY CONFIGURATION
CHARGEHIVE
EV CHARGING
A pre charged ChargeHive supplies a defined charging window without an operating generator at the point of use.
BEST FIT
Events, demonstrations and scheduled fleet support
03 / SITE PROFILE & OPERATION
Fleet Depot With Constrained Utility
A commercial fleet depot operates 16 Rivian R1T trucks. The vehicles return during a concentrated evening period and require an average daily replenishment of 50 kWh per truck before the next operating shift. The depot has existing 480 V, three-phase electrical service and DC fast charging infrastructure. However, only 80 kW of utility capacity is available for vehicle charging after accounting for the facility’s other loads. Supporting the full charging demand directly from the grid would require a substantial utility and transformer upgrade.
Constrained Rivian Fleet
Fleet
16 Rivian R1T trucks
Charging infrastructure
Existing managed DC fast-charging system, 240 kW aggregate capacity
Electrical service
480 V, three-phase
Utility capacity available for charging
150 kW
Average daily energy per vehicle
50 kWh
Total daily vehicle energy
800 kWh
EV CHARGING
4 PM - 8 PM
16
RIVIAN RIT TRUCKS
800 kWh
VEHICLE ENERGY
240 kW
PEAK DEMAND
GRID RECHARGE
8 PM - 3 AM
480 kWh
ENERGY RESTORED
80 kW
AVAILABLE GRID POWER
6.7 hrs
RECHARGE TIME
READY / STANDBY
3 AM - 4 PM
13 hours
AVAILABLE BETWEEN CYCLES
Primary charging window
4 hours
Average charging demand
200 kW
Peak charging demand
240 kW
Conventional alternative
Utility Upgrade
ChargeHive configuration
One HiveCore and One HiveMax
Combined battery capacity
780 kWh
Combined PCS output
420 kW
Modeled battery contribution
480 kWh per charging cycle
Battery round-trip efficiency
90%
Charging interface
Hives supply the existing 480 V charging distribution
The Hives are connected to the existing charging distribution. The systems recharge from the available utility connection outside the primary charging period and supplement utility power when multiple vehicles charge simultaneously.
04 / RESULTS
Operating and Cost Impact
Cost Assumption
Available utility capacity
Utility upgrade allowance
HiveCore rental
HiveMax rental
Combined ChargeHive rental
One-year ChargeHive rental
Electricity rate
Demand charge
Annual operating days
ONE-YEAR COST REDUCTION
$146,520
Modeled comparison
UTILITY DEMAND REDUCTION
67%
240 kW to 80 kW
Utility Upgrade
240 kW
$300,000
$0.15/kWh
$20/kW/month
300 days
UTILITY UPGRADE AVOIDED
$300,000
Site-specific allowance
ChargeHive Rental
80 kW
$6,250/month
$9,540/month
$15,790/month
$189,480
$0.15/kWh
$20/kW/month
300 days
UTILITY WAIT AVOIDED
6-18 month
Transformer lead time
ANNUAL UTILITY COST SAVINGS
$36,000
Energy & demand
Costs are based on specific equipment rental rates, utility data and the modeled site load profile. Actual performance and pricing will vary by project, equipment configuration and location.