40kw Deye High Voltage System

Why this system

Engineered by Deye for commercial loads, farms, guesthouses and large homes that demand true three-phase performance with deep storage. Dual 20 kW high-voltage hybrid inverters deliver seamless backup, high PV harvest and fast battery charge/ discharge, while a 102 kWh HV lithium bank ensures long runtime after sunset.

What’s in the box

• Inverters: 2 × Deye 20 kW High-Voltage Three-Phase Hybrid (40 kW total continuous AC)

  • Grid-tie + off-grid + backup modes

  • Parallel/phase-balanced operation & smart load management

  • Wi-Fi/RS485 monitoring via Deye Cloud/App

• Battery Storage: 20 × 5.12 kWh HV LFP modules (≈ 102.4 kWh nominal)

  • 2 × Deye HV 3U battery racks (10 modules per stack)

  • 2 × Deye HVB750V/100Ah control boxes with integrated BMS

• PV Array: 80 × 550 W Tier-1 mono-PERC/half-cell panels (≈ 44.0 kWp DC)*
  *Array size optimised for strong year-round production; configurable 72–96 modules depending on roof space and tariff strategy.

• Balance of System (BoS):

  • DC isolators, DC/AC breakers, surge protection (SPD), fuses & combiner hardware

  • MC4 connectors & UV-rated PV cable

  • Roof mounting rails, mid/end clamps & earthing lugs (pitched or flat-roof kit)

Key advantages (at a glance)

• True high-voltage architecture: slimmer cables, lower losses, faster charge rates.

• Seamless backup: millisecond transfer keeps critical loads online during outages.

• Scalable & future-proof: add PV strings or parallel stacks as your load grows.

• High efficiency: hybrid topology maximises self-consumption and cuts grid spend.

• Battery longevity: LFP chemistry with advanced BMS, designed for daily cycling.

• Smart energy management: TOU scheduling, peak-shaving, generator integration.

• Remote monitoring: Deye Cloud analytics, alerts & firmware updates.

Performance guide

• PV capacity: ~44 kWp DC

• Typical daily production: 180–260 kWh/day (location & season dependent)

• Usable storage: up to ~92–98 kWh (configurable depth of discharge)

• Ideal loads: cold rooms, pumps, compressors, office parks, restaurants, guesthouses, multi-dwelling estates, and large residences with 3-phase supply.

Compliance & warranty

• Designed to meet NRS-097-2-1/SSEG interconnection requirements.

• Certificate of Compliance (COC) provided with professional installations.

• Inverter warranty: 5 years (extendable options available).

• Battery warranty: 10 years / cycle-based, per manufacturer T&Cs.

• Panels: 12-year product / 25-year linear performance warranty.

Recommended configuration & options

• Critical/Essential loads sub-DB with automatic transfer & surge protection.

• PV oversizing strategy (up to manufacturer limits) to boost winter harvest.

• Weather station & CTs for export limiting and yield analytics.

• Generator input with auto-start for extended bad-weather resilience.

• Ground-mount or carport structures if roof area is constrained.

What this system solves

• Cuts daytime grid consumption dramatically while keeping operations running during outages.

• Provides long evening runtime (100 kWh-class storage) for productive hours after sunset.

• Stabilises 3-phase equipment, reducing start-up dips and nuisance trips.

• Enables tariff optimisation with charge/discharge schedules and peak-shaving.

Technical summary

• AC output: 40 kW three-phase (2×20 kW), high surge capability

• PV array: 80×550 W ≈ 44.0 kWp (configurable 72–96 modules)

• Battery bank: 20×5.12 kWh HV LFP ≈ 102.4 kWh total, 2× HV racks with HVB control boxes

• Operating modes: grid-tie, hybrid, off-grid, backup, peak-shaving, export-limit

• Comms & monitoring: Wi-Fi/RS485/CAN, Deye Cloud/App