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One-stop smart energy products for homes, balconies and outdoor scenarios

Balcony Solar PV Kit

SU800D

Plug and play · Smart monitoring · Lightweight deployment

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AC ALL-in-One Energy Storage System(ESS)

SR5000

5.12 kWh · 2400 W

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AC ALL-in-One Energy Storage System(ESS)

SR5000 AC PRO

5.12 kWh · 2500 W

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DC Stackable Balcony Battery

S3-20

2 kWh · 2–10 kWh

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Lithium Battery

LG-LW2420

25.6V · 20Ah · 500Wh · Lithium iron phosphate

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Sodium-ion Battery

LG-N24V15Ah

24V · 15Ah · 360Wh · Low-temperature performance

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Lead-acid Battery

Lead-acid starting batteries for passenger and commercial vehicles.

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Battery Management System (BMS)

KL61715

Status monitoring · Active protection · Smart management

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ESS

Product comparisons

Overview

Balcony Energy Storage Systems — 4-Product Comparison
Item	SR5000	SR5000 AC PRO	L-A50 Hybrid	S3-20
Product Name	All-in-One Solar ESS	AC Coupled Battery Energy Storage System	Hybrid All-in-One ESS	Micro DC ESS / Balcony Micro Energy Storage
System Architecture	DC-coupled: direct PV input + built-in inverter, AC output	AC-coupled: no PV input; plugs into wall socket; works with existing PV / microinverters	Hybrid: direct PV input + built-in hybrid inverter, on-grid & off-grid AC output	DC-coupled: direct PV input, DC output (no built-in AC inverter)
Mounting / Installation	Floor-standing or wall-mounted, plug & play	Wall-mounted, ultra-quiet (<30 dB), 3s plug-and-play	Floor standing, indoor / outdoor	Wall-mounted, lightweight design
Battery Capacity	Fixed 5.12 kWh	Fixed 5.12 kWh	Fixed 5 kWh	2.01 kWh base, expandable to 10 kWh (+4 x SE-20 packs)
Max. System Capacity (Parallel / Expansion)	20.48 kWh (parallel operation)	30.72 kWh (up to 6 units; 1PH 3500 W / 3PH 10500 W)	—	10 kWh (up to 4 expansion batteries)
Rated AC Output (On/Off-grid)	800 W default / 2400 W max.	800 W default / 2500 W max.	2500 W on-grid & off-grid (peak 4000 VA / 10 s)	— (DC output only, 800 W rated discharge)
Key Differentiator	Largest AC power in SR5000 line, cold-climate heating film	AI dynamic tariff scheduling, VPP open API, 3-phase parallel	4 x MPPT (4800 W PV), 5-inch TFT display, NFC, 60-month warranty, thermal boosting	Smallest & lightest (20 kg), lowest entry cost, modular stacking
App Ecosystem	Voltdeer App (AI green power, OTA, charge/discharge plans)	Voltdeer App (AI scheduling, dynamic pricing, VPP / open API)	Wi-Fi / Bluetooth App + NFC (ECU configuration)	iRnergy App (real-time monitoring)

Full Specification Comparison

Full Specification Comparison — 4 Balcony ESS Products
Parameter	SR5000	SR5000 AC PRO	L-A50 Hybrid	S3-20
Battery System
Battery Type	LiFePO4	LiFePO4	Rechargeable Li-ion (LFP)	LFP
Rated Capacity / Energy	5120 Wh (100 Ah)	5120 Wh (100 Ah)	5000 Wh	2010 Wh (base unit)
Rated Voltage (V)	51.2	51.2	— (operating 43 - 60 V)	51.2
Operating Voltage Range (V)	44.8 - 58.4	44.8 - 58.4	43 - 60	43.2 - 57.6
Max. Charging Power / Current	60 A	60 A	5000 W / 50 A charge-discharge current	2400 W max charge power (w/ expansion packs)
Max. Discharging Current (A)	60	60	50	25 (rated) / 30 (max)
Rated Discharge Power (W)	—	—	—	800 (max output 1200 W)
Depth of Discharge	—	—	90%	—
Cycle Life	6000+ cycles	6000 cycles	>6000 cycles	6000 cycles
Design Lifetime / Warranty	15 years	—	15 years / 60-month standard warranty	15 years
Low-Temperature Capability	Heating film, charge/discharge down to -20 °C	—	Thermal Boosting Technology (-20 °C)	Operates to -20 °C
Capacity Expansion	Parallel up to 20.48 kWh	Parallel up to 30.72 kWh (6 units)	—	+4 x SE-20 packs up to 10 kWh (2.5-15 kWh range)
PV Input
Number of MPPT Channels	2	None (AC-coupled)	4	2
Max. PV Input Power (W)	1000 x 2 = 2000	—	1200 x 4 = 4800	2400
PV Operating Voltage Range (V)	10 - 100	—	18 - 60	13 - 60 (MPPT range 20 - 54)
Max. Input Voltage (V)	100	—	60	60 (per channel)
Max. Input Current (A)	16 x 2	—	30 x 4 (short-circuit 50 A x 4)	32 (short-circuit 40)
Startup Voltage (V)	—	—	18	15
Modules per Channel	Compatible with any PV	—	—	Max. 2 (recommended 300-600 W+)
AC Grid Connection (On-grid)
Grid Type	Single-phase, unidirectional	Single-phase	Single-phase, 220 / 230 Vac L+N+PE	— (no AC grid connection)
Rated AC Voltage / Frequency	230 Vac / 50 Hz	230 Vac / 50 Hz	220 / 230 Vac / 50-60 Hz	—
Rated Output Power (W)	800 (default) / 2400 (max.)	800 (default) / 2500 (max.)	2500 (max. apparent 2750 VA)	—
Rated / Max. Output Current (A)	10.9 (max.)	3.48 (default) / 10.87 (max.)	10.87 / 11.36	—
Rated Input Power (W)	2400	2500	2500	—
Max. Continuous Input Current (A)	10.9	10.87	—	—
Power Factor	—	—	0.8 leading … 0.8 lagging	—
Total Harmonic Distortion	—	—	<5%	—
Zero Feed-In / Microinverter Compatibility	Compatible with existing PV systems	Direct microinverter connection, zero feed-in	CT (EMS) meter based energy management	—
Off-Grid / Backup Output
Off-Grid AC Port	230 Vac / 50 Hz / 2400 W / 10.9 A	230 Vac / 50 Hz / 2500 W / 10.87 A	2500 W (max. apparent 2750 VA; peak 4000 VA / 10 s), EU standard power socket	None (DC output only)
DC Output	—	—	—	20 - 45 V, max. 30 A
UPS Switchover Time	<10 ms	10 ms	≤15 ms	—
Efficiency
MPPT Efficiency	—	—	—	99.9%
Battery Charge/Discharge Efficiency	—	—	—	94.0%
Structure & Environment
Dimensions (mm)	520 x 181 x 715	503 x 176 x 615	700 x 474 x 150	350 x 174 x 225 (SE-20 pack: 350 x 174 x 182)
Weight (kg)	59 +/- 2	55 +/- 2	54 +/- 0.5	20 (SE-20 pack: 18)
Protection Rating	IP65	IP65	IP65 (waterproof & shock resistant)	IP65
Operating Temperature (°C)	-20 to 60	-20 to 60	-20 to +55	-20 to 55
Relative Humidity	5 - 95%, no condensation	5 - 95%, no condensation	0 - 95%	0 - 95%, no condensation
Max. Operating Altitude (m)	2000	2000	≤2000	2000
Cooling Method	Dual fans	Natural cooling (<30 dB)	Natural convection	Natural cooling
Inverter Topology / Protective Class	—	—	Isolated / Class I, DC II / AC III overvoltage	—
Display	LED indicators + battery bar	LED strip + small display	TFT 5-inch color display	LED indicator strip
Communication & Smart Features
Communication Interface	Wi-Fi, Bluetooth, RS485	Wi-Fi, Bluetooth, RS485	Wi-Fi / Bluetooth (+ NFC for ECU configuration)	Wi-Fi (BT) + RS485
App	Voltdeer App: AI smart green power, OTA, charge/discharge plans, smart-socket mode	Voltdeer App: AI scheduling, dynamic tariffs, custom charge/discharge, VPP open API	Vendor app via Wi-Fi / Bluetooth; NFC one-touch ECU configuration	iRnergy App: real-time monitoring and control
Compatible Smart Meters	Shelly, Voltdeer SMeter-RS02 / RC01	Shelly, SMeter-RS02, SMeter-RC01 (optional)	CT (EMS) based metering	—
Estimated Savings Claim	—	EUR 800+ per year (AI scheduling, vendor estimate)	—	—
Certifications & Standards
Certifications	CB (IEC 62619, IEC 60730-H), CE-LVD (IEC 62109-1/2, IEC 62477-1), CE-EMC, CE-RED, IEC 18031-1, RoHS, REACH, WEEE, EN 50549-1/10, C10/11, VDE 4105, CEI 0-21, UN38.3, MSDS, IP65	EN 50549-1/10, C10/11, VDE 4105, IEC 62477, IEC 62619, IEC/EN 61000, RoHS, REACH, WEEE, UN38.3, CE	EN 50549-1, VDE 4105/0124, IEC 62040, IEC 62477, IEC/EN 61000-6-1/-2/-3/-4, IEC/EN 61000-3-2/-3, EN 300328, EN 301489-1/-17, EN 50665, IEC 62619	CE, WEEE, UN38.3, RoHS, REACH, IEC 62619

Key Differences

Key Differences Summary (4 Products)
Dimension	Difference
Architecture	SR5000 and L-A50 are DC-coupled hybrids (PV direct input + built-in inverter + AC output). SR5000 AC PRO is AC-coupled (no PV input; exchanges power via wall socket; pairs with existing microinverter PV for zero feed-in). S3-20 is pure DC micro storage (PV in, DC out 20-45 V / 30 A; requires an external inverter for AC). L-A50 is the only one with a 5-inch TFT display and NFC-based ECU configuration.
PV input	L-A50 leads with 4 x MPPT and 4800 W total PV input. SR5000 offers 2 x MPPT / 2000 W with a wider voltage window (10-100 V). S3-20 offers 2 channels / 2400 W at low voltage (13-60 V). AC Pro has no PV input at all.
AC power	L-A50 and AC Pro both reach 2500 W (L-A50 adds 2750 VA apparent and 4000 VA / 10 s peak). SR5000 tops at 2400 W. S3-20 has no AC stage. UPS switchover: SR5000 <10 ms, AC Pro 10 ms, L-A50 ≤15 ms.
Capacity strategy	SR5000 / AC Pro / L-A50 ship at fixed ~5 kWh (5.12 / 5.12 / 5.0) and scale by paralleling units (20.48 kWh for SR5000 and 30.72 kWh for AC Pro). S3-20 starts at 2.01 kWh and scales internally by stacking up to 4 expansion packs to 10 kWh — lowest entry cost, pay-as-you-grow.
Size & installation	S3-20 host is by far the smallest and lightest (20 kg). L-A50 is the flattest (700 x 474 x 150 mm, 54 kg, floor standing, indoor/outdoor). AC Pro (55 kg) is wall-mounted and quiet (<30 dB); SR5000 is the tallest and heaviest (59 kg, dual-fan cooled).
Unique features	SR5000: heating film for -20 °C charge/discharge; smart-socket load linkage. AC Pro: AI dynamic tariff scheduling (EUR 800+/yr estimated annual savings), VPP open API, 3-phase parallel (10.5 kW). L-A50: 4-MPPT hybrid, 90% DoD, THD <5%, 60-month standard warranty, thermal boosting. S3-20: MPPT efficiency 99.9%, round-trip efficiency 94%; modular expansion.
Ecosystem	SR5000 series uses the Voltdeer App with Shelly / Voltdeer smart meter support. L-A50 uses Wi-Fi / Bluetooth with NFC touch configuration and CT (EMS) metering. S3-20 uses the iRnergy App. All support ≤2000 m altitude and IP65 (except indoor/outdoor rating is explicit on L-A50).