Project Cases 
Location: Retail Shop Hybrid Backup Power
Source: Longlight Energy Published: 2026-07-15 Views: 244
Project Overview
A convenience retail chain standardized on Longlight-INV4 + Longlight-304 cabinet ESS kits so each store can ride through grid dips without losing sales or spoiling cold inventory.
Customer Challenge
Even short outages freeze card payments and warm freezers. Store managers needed a quiet, automatic system that staff can monitor without an electrician on site.
Longlight Solution
Each store receives Longlight-INV4 11kW hybrid inverter, roof PV (400W modules), and floor-standing Longlight-304 15kWh LiFePO4 cabinet. Critical circuits (POS, lighting, freezers) are hard-wired to the backup output.
System Architecture
- Roof PV → Longlight-INV4 MPPT
- Longlight-INV4 hybrid manages grid / PV / battery priority
- Longlight-304 cabinet ESS in back-of-house plant area
- App SOC monitoring for multi-store supervisors
Key Products Deployed
Technical Highlights
- 8000+ cycle class LiFePO4 chemistry for daily use
- CAN/RS485 BMS communication
- App-visible state of charge for remote managers
- Pure sine wave for refrigeration compressors
System Snapshot
| Inverter | Longlight-INV4 11kW |
|---|---|
| Battery | Longlight-304 15kWh |
| Backup focus | POS · lighting · cold storage |
| Rollout model | Repeatable store kit |
Results & Benefits
- Fewer lost transactions during brownouts
- Reduced spoilage risk for refrigerated goods
- Daytime solar offsets store base load
Related Equipment
Longlight-INV4
Longlight-304 Cabinet
Need a similar PV + energy storage design for your market? Longlight Energy supports OEM/ODM, multi-unit parallel schemes and global distribution partners.
Reference solution based on Longlight Energy product portfolio — Solar Inverter & Battery Energy Storage Power Supply.
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