AC-coupled (retrofit onto existing solar)

Sunpura S2400 AC 2.4 kWh

Add 2.4 kWh of storage and backup to a home that already has solar. AC-coupled, dual-CT metering, no rewiring of your existing panels.

2.4 kWh
rated energy
2,400 W
rated power
8,000
cycles (70% SOH)
10 yr
warranty
Sunpura S2400 AC retrofit home battery

What it is

The Sunpura S2400 AC is the AC-coupled version of the S2400. It is made for homes that already have solar: instead of connecting panels directly, it couples onto your existing solar and inverter over AC, so there is no rewiring of the array. A dual-CT meter reads your existing inverter, giving the system a complete picture of what your home produces and uses.

Add storage to solar you already have

Thousands of South African homes installed rooftop solar without a battery. The S2400 AC is the simplest way to add 2.4 kWh of storage and backup to that setup: store surplus solar and cheaper off-peak power, and use it when tariffs are highest or when the grid drops.

Why AC-coupled

  • Retrofit-friendly: works alongside most existing inverters and solar systems, no re-cabling of the panels.
  • Dual-CT metering: accurate, whole-home energy awareness.
  • Same trusted platform: LiFePO4 cells, 8,000 cycles, 90% depth of discharge.
  • Plug-and-play and stackable, managed in the Sunpura HOME app.

Certification

European and international certification (CE/EMC, RED, LVD, CB, RoHS, REACH, UN38.3, IP65, WEEE, VDE 4105, EN 50549 and more). We publish this as CE and CB certification, and we claim no South African approval.

Full specifications

S2400 AC technical parameters

AC coupling
Max AC input (AC coupled)2,400 W
MeteringDual-CT (reads third-party inverter)
Works withan existing rooftop PV / inverter system
Battery
ChemistryLiFePO4 (LFP)
Nominal voltage48 V
Rated energy2,400 Wh (2.4 kWh)
Max charge / discharge current50 A
Rated power2,400 W
Cycle life8,000 cycles at 70% SOH (1.0C)
Depth of discharge90%
AC output (backup / off-grid)
Max output power2,400 W
Max output current10.9 A
Peak output (5 s)3,600 W
Nominal output220 / 230 VAC, 50 Hz
General
Protective classClass I
Operating temperature−20 °C to 55 °C
Ingress protectionIP65
Net weightPower Box 14 kg + Battery Box 26.5 kg
Dimensions (W x H x D)450 x 430 x 285 mm
CommunicationWi-Fi / Bluetooth
Warranty10 years

Certification

European and international certification, published as CE and CB. No South African approval is claimed.

CE / EMCREDLVDCBRoHSREACHUN38.3IP65WEEEVDE 4105EN 50549

Interested in the S2400 AC?

Request a quote, or partner with Sunpura as a distributor or installer.