Project Overview

A metal workshop needed higher continuous AC capacity than a single residential inverter could provide. Parallel Longlight-INV5 units deliver scalable power while keeping a modular battery design.

Customer Challenge

Welders, compressors and lighting required more headroom. The customer wanted modular growth rather than replacing the whole system when production lines expand.

Longlight Solution

Three Longlight-INV5 parallel hybrid inverters operate as a cluster (platform supports up to 6 units). Dual MPPT harvests multi-roof PV strings; dual AC outputs separate critical and non-critical loads. Battery communication via RS485/CAN keeps packs balanced.

System Architecture

• Multiple PV arrays → dual MPPT per inverter
• Longlight-INV5 parallel bus (capacity expansion without redesign)
• Shared LiFePO4 storage (Longlight-200 packs and/or Longlight-304 cabinet)
• Load panel split: critical process vs general lighting

Key Products Deployed

Longlight-INV5 Parallel Hybrid Inverter 6.2–11kWParallel hybrid inverter 6.2–11kWView product →

Longlight-200 Wall-mounted LiFePO4 ESS 10kWhModular wall ESS for stage-1 storageView product →

Longlight-304 Cabinet LiFePO4 ESS 15kWhCabinet ESS for higher energy reserveView product →

Technical Highlights

• Parallel up to 6 units for staged CAPEX
• Dual MPPT / dual AC output architecture
• Battery-free mode option for pure PV-grid hybrid days
• RS485 / CAN friendly BMS integration

System Snapshot

Results & Benefits

• Higher continuous power without single-unit bottleneck
• Phased investment: add inverter units as loads grow
• Stable pure sine output for motor and electronic loads

Related Equipment

Longlight-INV5 Parallel Hybrid

Longlight-304 Cabinet ESS

Reference solution based on Longlight Energy product portfolio — Solar Inverter & Battery Energy Storage Power Supply.