Virtual Expansion: Enabling Older Buildings to Access Stable and Green Power Systems

In many older buildings—such as hotels, apartments, shopping malls, campuses, and the like—power outages are a common occurrence. Especially during summer, when air conditioners, water heaters, and electrical appliances are turned on, circuit breakers trip and power cuts occur. The core issue isn’t excessive equipment but an overburdened power system itself—aging supply lines, insufficient transformer capacity, and frequent failures during peak loads. Moreover, individual households face grid-imposed power capacity limits, preventing increased usage.

1. What challenges do they face?

Challenge 1: Ensuring stable power without altering existing wiring

Retrofitting old building circuits is costly and complicated. Most homeowners actually hope that, without major alterations to the existing power lines, the entire building can operate more stably, avoiding frequent power outages.

Challenge 2: System Prone to “Crashing” During Peak Hours

Especially during evenings or summer heat waves, electricity consumption surges. Once it exceeds the grid’s connection capacity limit, circuit breakers may trip. To solve this problem without expanding the grid interface, how can a continuous power supply be ensured during peak hours?

Challenge 3: Daytime PV, Nighttime Green Power

Many users have installed PV systems, but the question remains: where does the electricity come from after sunset? People don’t want to waste the green power generated during the day; they prefer to “store electricity during the day and use it at night,” maximizing PV self-consumption.

2. Real-World Case: Energy Storage + EMS – Virtual Expansion Delivers

In a Guangzhou building, we deployed a PV system and energy storage equipment integrated with an EMS energy management system, achieving a smart power upgrade without grid expansion.

System Configuration:

PV Generation: 80kW

Energy Storage Batteries: 215kWh

PCS Power Converters: 5 units distributed across floors

Achieved Results:

During peak hours, the system automatically tracks load changes and intelligently releases stored energy, achieving an “expansion” effect.

Daytime generation → Prioritizes building consumption, storing excess in batteries; When PV output is insufficient → Releases stored energy.

Prevents reverse power flow, supports forced charging mode, and increases green energy utilization.

Real-time power monitoring + fuse protection ensures safety without tripping.

Supports remote management, providing clear visibility into operational status.

Weather-predictive operation strategy adjustment enables proactive power allocation

3. Solution Highlights at a Glance:

Edge Solver: Real-time floor-by-floor load sensing dynamically optimizes system strategies

Virtual Capacity Expansion: Energy storage automatically responds to load demands, relieving circuit strain

PV “Transportation” Capability: Daytime generation stored for nighttime release, achieving full green power coverage

One-to-Many Storage: A Single energy storage system serves multiple floors, maximizing resource efficiency

4. Results? Customers are thrilled

Not only did power stability improve, but green transformation and cost control were achieved:

Uninterrupted operations: Completely eliminated circuit breaker trips caused by overloads

Electricity cost savings: Peak shaving and valley filling reduced bills by over 70%

Green upgrade: 100% utilization of PV power, advancing toward low-carbon operations

5. We can customize smarter power solutions for you!

The greatest value of this solution lies in its ability to significantly enhance power supply capacity and stability without major wiring modifications or transformer replacements. The microgrid EMS system synergizes PV and energy storage, squeezing every last drop of potential from each aging cable to breathe new life into older buildings!

Contact us today to receive your exclusive green energy upgrade plan and effortlessly propel your building into the “smart power era.”