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EV charging + BESS · all-in-one

EV charger with built-in BESS

120 kWh · 30 kW grid input · 60 kW shared output

One enclosure combines a 120 kWh LFP battery, a 30 kW bidirectional grid module and reversible DC-DC modules. The battery charges slowly from the grid and delivers fast DC charging to two CCS-2 guns, while AC Type 2, a 3.3 kW socket and a light-EV Type 6 / 7 output run from the same system. On grid failure, enabled outputs keep running on battery.

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Battery
120 kWh LFP
Grid input
30 kW
Shared output
60 kW
Outputs
CCS-2 · Type 2 · Type 6/7
System power flow

How the energy moves.

System power flow · 120 kWh BESS | 30 kW grid charging | 60 kW shared output

Energy transferExternal DC rechargeCombined output ≤ 60 kW · allocated by EMSTOBOR EV CHARGER WITH BESSGRID SUPPLYAC charging sourceAC EV OUTPUTS1 × 22 kW Type 21 × 3.3 kW socketEV / portable EVSE → EVAC DISTRIBUTIONGrid isolation / switchingGrid & AC energy meters1 × 30 kW AC-DCBidirectional moduleGrid → battery: ≤ 30 kWBattery → AC outputsCENTRAL BATTERY BANK120 kWh backup requirement3.2 V / 314 Ah LFP cells16S pack: 51.2 V · 16.08 kWhIllustrative: 8 packs in series409.6 V nominal / 314 Ah128.6 kWh nominal totalBMS + DC protection / pre-charge2 × 30 kW DC-DCReversible modulesCombined: 60 kWCase 1: battery → EVCase 2: EVSE → batteryDC meter + interlocks1 × 3 kW DC-DC40–58 V output / ≤ 50 AEXTERNAL EV CHARGER60 kW DC output EVSECCS-2 input to BESSBESS as charging clientELECTRIC VEHICLES2 × CCS-2 guns1 EV: up to 60 kW2 EVs: 30 kW each2W / LIGHT EVType 6 / Type 72.0–2.9 kW at 50 AAC40–58 V DC · branch metering

Scroll the diagram sideways →

Conceptual architecture. Case 1 and Case 2 use the same DC modules in mutually exclusive modes. The 60 kW cap includes AC, CCS-2 and light-EV outputs. Pack topology is illustrative; converter voltage range, usable-energy window and final topology are confirmed at order.

Normal operation

  • Grid → 30 kW AC-DC module → battery, at up to 30 kW.
  • Battery → DC-DC modules → CCS-2: one EV at up to 60 kW, or two at 30 kW each.
  • EMS allocates the 60 kW shared cap across CCS-2, AC and light-EV outputs.

Grid failure

  • Grid is isolated automatically.
  • Enabled outputs continue on battery-backed supply.
  • On grid return, battery charging resumes under EMS limits.

External DC recharge

  • The same reversible DC-DC modules accept up to 60 kW from a compatible external DC charger.
  • The BESS acts as the charging client through an interlocked CCS-2 inlet.
  • Roughly 2 h for 120 kWh at 60 kW on an ideal energy basis.
Design basis

Technical specification.

Power conversion & outputs

  • Grid / AC conversion1 × 30 kW bidirectional AC-DC module
  • CCS-2 DC charging2 × 30 kW DC-DC · 60 kW combined
  • CCS-2 allocation1 EV up to 60 kW · 2 EVs at 30 kW each
  • AC outputs1 × 22 kW Type 2 · 1 × 3.3 kW socket
  • Light-EV output3 kW DC-DC · Type 6 / 7 · 40–58 V, 50 A
  • Shared output cap60 kW combined, EMS-managed
  • Vehicle protocolsDIN 70121 · ISO 15118-2

Battery

  • CellLFP · 3.2 V · 314 Ah
  • Pack16S · 51.2 V nominal · 16.08 kWh
  • Illustrative bank8 packs in series · 409.6 V · 128.6 kWh nominal
  • Backup requirement120 kWh
  • BMS16S per pack · active (2 A) + passive balancing

Control, metering & protection

  • EMSPower allocation · SOC limits · operating modes
  • Charging controllerVehicle comms · converter commands · interlocks
  • MeteringGrid, battery and per-output energy meters
  • ProtectionAC/DC contactors · breakers / fuses · DC pre-charge & isolation
  • MonitoringOnline status, SOC, remote start / stop

Design-basis values from a TOBOR project offer. *Cycle life depends on cell OEM specification, depth of discharge, temperature, C-rate and end-of-life criterion. Final ratings, certifications and performance guarantees follow the approved project-specific design.

Best for
  • Sites where the grid connection is too small for a 60 kW DC charger
  • Fleet and cab hubs mixing cars, 3W and 2W
  • CPO locations that need charging to continue through outages
  • Interim sites waiting for a grid upgrade
Built from
Other designs

More project solutions.

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BESS-backed EV charging hub

125 kW / 250 kWh BESS + 2 × 60 kW DC chargers

C&I storage · MW-scale
Grid-charged MW-scale BESS

1.25 MW / 5 MWh · 440 V three-phase

Want this design at your site?

Tell us your vehicles, loads and grid connection. Our engineers adapt the design and send a single-line diagram with the offer.

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