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Ultra Balcony ESS 2500W

Max 5200W PV Input
4 MPPT
Max 2500W Input/Output
Default on‑grid 800W
Stacked Design
5‑20kWh modular expansion on‑demand
  • Overview
  • Recommended Products

Product Overview (Brief Summary)

Let's talk about why adding the Ultra Balcony ESS 2500W to your product lineup is a complete game-changer for your B2B solar and energy storage portfolio. If your commercial clients, renewable energy installers, or residential wholesale buyers are constantly complaining about soaring electricity bills and unpredictable grid stability, you need a product that actually delivers practical, scalable relief. That is precisely where this balcony energy storage system shines. Built by LAVIESUN, it takes the complexity out of urban renewable energy integration and puts heavy-duty power right where people need it most—right on their apartment balconies, exterior walls, or small commercial decks.


Detailed Description

When you look at what makes a great residential energy storage system, flexibility, safety, and straightforward installation always come first. This unit features a smart stacked design that lets users start with a manageable 5kWh setup and scale all the way up to 20kWh on-demand. Imagine telling your wholesale buyers or installation contractors that they don't need to rip out old infrastructure when energy demands grow over time. They can simply stack additional modular battery blocks whenever necessary. That kind of modularity makes inventory management an absolute breeze for distributors and keeps installation times remarkably short on-site, saving labor costs for every project.


Let's dive right into the technical backbone that makes this 2500W balcony energy storage unit so deeply appealing to experienced engineers and solar contractors. Solar panel placement in urban apartments is rarely ideal; shading from neighboring buildings, trees, or complex balcony railings usually ruins energy harvest. To solve this common engineering headache, LAVIESUN equipped the system with four independent MPPT channels supporting up to a massive 5200W maximum PV input. Each MPPT channel operates completely autonomously, meaning shaded panels won't drag down the voltage or performance of the sunny ones. It is a brilliant piece of engineering that maximizes every single ray of sunlight hitting the balcony surface.


Power management is another area where this system punches well above its weight class. While the default on-grid output is calibrated to a compliant 800W to meet regional utility regulations smoothly, the unit delivers a robust 2500W of input and output power capacity when called upon for heavier domestic loads or microgrid applications. Furthermore, the system integrates seamlessly with popular smart meters and energy monitoring platforms like Shelly, Tibber, and HomeWizard. This intelligent anti feed-in power capability ensures that surplus energy stays inside the local property network or gets stored safely in the batteries, avoiding any regulatory headaches or penalties over unauthorized grid export.


Key Product Features

  • Stacked Modular Design: Enables scalable storage capacity from 5kWh to 20kWh on-demand, allowing users to expand their balcony energy storage system as energy requirements grow.

  • Quad-MPPT Architecture: Incorporates 4 independent MPPT channels supporting up to 5200W PV input, optimizing solar harvest across shaded or multi-angle panel setups.

  • Intelligent Anti Feed-In Control: Fully compatible with third-party smart meters and energy platforms such as Shelly, Tibber, and HomeWizard to prevent unwanted grid injection.

  • Advanced Self-Heating Technology: Ensures stable operation and safe charging protocols down to -20°C in cold winter environments.

  • Flexible Parallel Expansion: Supports parallel configurations up to 3 units in a 1-phase setup and up to 9 units in a 3-phase setup.

  • Extended Service Lifecycle: Delivers up to 8,000 charge-discharge cycles backed by a robust 10-year battery warranty for long-term reliability.

Technical Advantages & Deep Analysis

What really sets this balcony energy storage system apart from standard market offerings is its proprietary battery optimizer. In the secondary market or during long-term maintenance cycles, mixing new and old battery cells usually creates dangerous voltage imbalances and drastically reduces overall lifespan. This smart optimizer dynamically balances cell differences, allowing users to safely mix new and used battery modules without sacrificing performance or system safety.


Combined with advanced self-heating technology that keeps the system fully operational and stable down to -20 degrees Celsius, this unit is built to withstand brutal winter conditions without flinching. In distributed photovoltaic deployments, partial shading often limits string performance. By utilizing a 4-MPPT topology for a 5200W PV input, the balcony energy storage system isolates shading losses to individual panels, ensuring aggregate power generation remains exceptionally high across all operational hours.


Application Scenarios

  • Urban Apartment Balconies: Empowers city residents to install a high-capacity balcony energy storage system, offsetting baseline electricity bills despite restricted rooftop access.

  • Residential Self-Consumption Optimization: Integrates with smart home platforms to store surplus daytime solar generation and discharge it during evening peak tariff hours.

  • Small Commercial Offices & Retail Kiosks: Provides scalable backup power and peak shaving capacity for light commercial workspaces.

  • Multi-Phase Microgrids: Utilizes parallel expansion capabilities (up to 9 units in 3-phase setups) to establish robust community or commercial energy reserves.


Commercial Value for B2B Partners

Distributors, solar installers, and energy wholesalers benefit significantly from incorporating the Ultra Balcony ESS 2500W into their product catalogs. The modular 5-20kWh stacked design reduces inventory complexity, allowing suppliers to service diverse customer requirements using standardized core components.


When it comes to durability and commercial value, the numbers speak for themselves. The system delivers up to 8,000 charge-discharge cycles, backed by a solid 10-year battery warranty that gives end-users incredible peace of mind. For installation companies and energy wholesalers, this means fewer warranty callbacks, lower maintenance costs, and much happier clients, making this residential energy storage system a commercially viable asset for wholesale procurement.


Frequently Asked Questions (FAQ)

Q1: What is the purpose of the 4 MPPT channels on the Ultra Balcony ESS 2500W?

A1: The 4 independent MPPT channels allow the balcony energy storage system to manage up to 5200W of PV input efficiently, optimizing energy harvest even when solar panels face different directions or experience partial shading.

Q2: Can older battery modules be added to an existing 5kWh setup later?

A2: Yes. The system features an integrated battery optimizer that supports mixing new and used battery modules, enabling modular expansion from 5kWh up to 20kWh safely.

Q3: How does the anti feed-in function operate with smart meters?

A3: The system interfaces with compatible smart devices and platforms such as Shelly, Tibber, and HomeWizard to monitor real-time home power consumption, automatically adjusting output to prevent unauthorized energy export to the grid.

Q4: What are the limits for parallel system expansion?

A4: The system supports parallel configurations up to 3 units for single-phase installations and up to 9 units for three-phase commercial setups.


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Ultra Balcony ESS

Plug‑in Stackable Hybrid Storage System

Inverter HN‑BESS‑2500
PV Terminal
Number of MPPT Trackers 4
Max PV Input Power 4*1300 /5200 W
Max PV Input Current 4*18 A d.c.
Max Short‑Circuit Current (Isc) 4*25 A d.c.
Max Open‑Circuit Voltage (Voc) 120 V d.c.
MPPT Voltage Range 22‑100 V d.c.
Startup Voltage 20 V d.c.
MPPT Efficiency 99.8%
AC Input (On‑Grid Terminal)
Grid Type Single‑Phase 2 Wire (L, N) + Protective Earth (PE)
Max AC Input Power 3600 W
Max AC Input Current 16 A a.c.
Max AC Charge Power 2500 W
Max AC Charge Current 10.9 A a.c.
Rated Input Voltage 230 Vac.
Rated Frequency Range 50 Hz
AC Output (On‑Grid Terminal)
Grid Type Single‑Phase 2 Wire (L, N) + Protective Earth (PE)
AC Output Power 799 / 2500 W
Max AC Apparent Power 799 / 2500 VA
Max AC Output Current 3.5 / 10.9 A a.c.
Rated AC Output Power 799 / 2500 W
Rated AC Apparent Power 799 / 2500 VA
Rated AC Output Current 3.5 / 10.9 A a.c.
Rated Output Voltage 230 V a.c.
Rated Frequency Range 50Hz
Power Factor Range 0.8 Lagging‑ 0.8 Leading
THDi <3%
Back‑up(Off‑Grid Terminal)
Max AC Output Power 2500 W
Max AC Output Current 10.9 A a.c.
Max AC Bypass Output Power 3600W
Max AC Bypass Output Curren 16 A a.c.
Rated AC Bypass Output Voltage 230 Vac.
THDV <2%
UPS Switch Time ≤ 10 ms
Parallel Operation Recommend 1 unit in single‑phase; 3 units in three‑phase
Protection
Over Voltage Protection, Under Voltage Protection, Over Current Protection, Short Circuit Protection, Over Temperature Protection,
Anti‑islanding Detection, Insulation Impedance Detection, Surge Protection
Yes
General Parameters
Operating Ambient Temperature ‑20‑55 °C
Max Operating Altitude 4000 m
Net Weight 14.2 kg
Dimensions (L x H x D) 485 x 305 x 167 mm
Ingress Protection IP65
Communication Method Wi‑Fi, Bluetooth
Monitoring Method APP
Inverter Topology Isolated
Protective Class Class I
Over Voltage Category AC: OVC III; DC: OVC II
Battery
Basic Parameters
Battery Energy 5024 Wh
Rated Voltage 63 V d.c.
Battery Capacity 314 Ah
Battery Type LiFePO4
Max Charge Current 42 A d.c.
Max Discharge Current 42 A d.c.
Charge Cycle Life 8000 (25℃, 0.5C, 70%EOL)
Recommended Stack Quantity of Batteries 1‑4 PCS
Protection
Over Voltage Protection, Under Voltage Protection, Over Current Protection, Over Temperature Protection, Over Charge Protection,
Over Discharge Protection
Yes
Product Features
Operating Ambient Temperature ‑20‑55 °C
Max Operating Altitude 4000 m
Cooling Method Natural Cooling
Net Weight 49 kg
Dimensions (L x H x D) 485305273 mm
Ingress Protection IP65

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