Ferroamp EnergyHub Wall 14K – 3-phase bi-directional inverter for the Ferroamp DC nanogrid

The Ferroamp EnergyHub Wall 14K (14 kVA) is the “beating heart” of a Ferroamp installation: a bi-directional inverter that converts energy from AC → DC as well as from DC → AC. It connects the 3-phase grid (230/400 VAC) to the Ferroamp DC nanogrid, to which you connect PV via Solar String Optimizers (SSO) and storage/logic control, for example.

Why this EnergyHub Wall 14K is handy

• Bidirectional: can both charge (AC→DC) and feed-in (DC→AC) within the Ferroamp system.
• DC nanogrid (760 V): central DC bus for clear and scalable system construction.
• Measurement = knowledge: measures AC (3-phase) as well as DC (voltage/current) for monitoring and optimisation.
• PLC communication over the DC bus: less loose data cables, but smart control.
• Scalable: up to 4 units in parallel (max. 56 kVA total).

Main specifications (14K / 14 kVA)

AC side

• Rated power: 14 kVA
• Reactive power: full 4-quadrant capacity within the applicable limit
• Rated voltage: 230/400 VAC
• Mains frequency: 50 Hz
• AC connection: 5-wire (L1, L2, L3, N, PE)
• Board fuse: MCB type B, 3×20 A

DC side (Ferroamp DC bus)

• DC bus voltage (nominal): 760 VDC
• DC bus voltage range: 720 – 800 VDC
• Max. DC bus current: 20 A
• DC bus connection: 4-wire (L+, M, L-, PE)
• DC bus communication: narrow-band power line communication (PLC)

Efficiency

• Max. efficiency DC → AC: 98.5%
• Max. efficiency AC → DC: 98.0%

Mechanical & installation

• Dimensions (H × W × D): 530 × 350 × 176 mm
• Weight: 23 kg
• Colour: black
• Protection rating: IP21 (indoor/technical room)
• Ambient temperature: -10°C to +45°C (output power may decrease above 30°C)
• Humidity: 0 – 95% RH (non-condensing)
• Max. altitude: 2000 m
• AC connector: Phoenix Contact PRC 5, screw terminal up to max. 6 mm²
• DC bus connector: Phoenix Contact Combicon, screw terminal up to 6 mm²

System design (useful for design)

• Parallel: 1 – 4 units (max. 56 kVA)
• Max. DC bus cable length: 200 m (above 200 m: design by agreement)
• Measurement data: AC ×3 (voltages, current, phase angles) + DC (voltage, current)
• Communication ports: Ethernet, USB, CAN

Installation tips (saves hassle)

• IP21 = inside: mount in a dry technical room (not outside, not in humid environments).
• Group box preparation: take into account MCB type B 3×20 A and sufficient space/provisions for possible later expansion (parallel).
• Cable cross-section check: terminals are up to 6 mm² (AC and DC bus) – plan your cabling accordingly.
• DC bus routing: keep the DC bus logical and service-friendly; for lengths approaching 200 m, net design is extra important.
• Thermal: above 30°C, the system may revert; so choose a location with decent ventilation and avoid heat sources.

Compliance & security

• LVD: EN 62019-1, EN 62109-2
• EMC: EN 61000-6-2, EN 61000-6-3
• Mains connection: EN 50549-1
• RoHS: yes
• Protections: AC overvoltage protection cat. III, DC overvoltage protection cat. II, DC bus short circuit, overheating