Project Cases 
Location: Family Home All-in-One Solar Power
Source: Longlight Energy Published: 2026-07-13 Views: 270
Project Overview
Households that want a single wheeled cabinet instead of separate inverter + battery boxes choose the Longlight-301 all-in-one system: 3kW pure sine inverter, 7.5kWh LiFePO4 and MPPT in one enclosure.
Customer Challenge
Installers needed a fast, low-training product for homes that lack space for multi-box systems, while still offering on/off-grid flexibility.
Longlight Solution
Deliver Longlight-301 as a turnkey cabinet with MC4 PV inputs, LCD touch UI (EN/CN), automatic mode switchover and 4000W-class MPPT charging path. Homeowners wheel the unit into a utility corner and connect PV + AC.
System Architecture
- PV modules (portable or rooftop) → MC4 inputs
- Integrated MPPT + hybrid/off-grid logic
- 7.5kWh LiFePO4 pack with smart BMS
- AC outlets / AC terminal for household loads
Key Products Deployed
Technical Highlights
- 6000+ cycle class LiFePO4 chemistry
- LCD touch control with bilingual UI
- Automatic off-grid / on-grid switchover
- Wheeled cabinet for flexible placement
System Snapshot
| Model | Longlight-301 |
|---|---|
| Inverter | 3kW pure sine wave |
| Battery | 7.5kWh integrated LiFePO4 |
| MPPT | Up to ~4000W PV charging path |
Results & Benefits
- Same-day installation for many homes
- Cleaner aesthetics vs multi-box stacks
- Ready path for distributors as a single SKU solution
Related Equipment
Longlight-301 All-in-One
PV modules
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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