FranklinWH aPower S 15kWh Hybrid Battery System
- Direct solar connection:
built-in 10KW hybrid inverter, with 4 MPPTs, 15A per MPPT, support maximum 20kW PV input - 15kWh per unit, up to 225 kWh (15 units) per aGate
- All weather suitable, IP67 protection :
Built-in heating blanket ensures reliable cold-weather performance, Stable operations in extreme 131° F (55° C) - Support DC-Coupled, AC-Coupled, Whole-home backup , Partial-home backup.
- 15-Year warranty
aPower S datasheet
aPower S installation guide
aPower S brochure
aPower S solution
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The aPower S is a battery storage device with integrated inverters to support a direct connection to solar (PV) panels. The front wiring design makes installation easier and more efficient. The aPower S also supports parallel AC-coupled connection with FranklinWH aPower 2 batteries to expand power and capacity for homes at the same time. It can be flexibly deployed according to customer requirements. Excellent load adaptability provides the best backup experience to users.
The aPower S combines a 15 kWh LFP battery, 11.5 kW continuous output, 20 kW direct solar input, and four built-in MPPTs in an integrated solar and storage system. Expandable up to 225 kWh per aGate, the system supports DC-coupled solar, AC coupling with the FranklinWH System, generator or V2L integration, and indoor or outdoor installation. The load start capacity up to 185A LRA, which can provide whole home backup with a single battery or parallel units. It provides a 60 MWh throughput or 15-year warranty, helping users to easily achieve reliable energy independence and freedom over the long term.
aPower S delivers a unified energy ecosystem with unmatched efficiency, higher return on investment (ROI), and lower lifetime costs compared to conventional systems. Its fully integrated design enables direct solar connection, maximizing solar energy capture, storage, and utilization.
Whole-home and Partial-home backup supported
DC-Coupled and AC-Coupled supported
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Key Features
- Direct Solar Connection
Up to 20kW direct solar input and 4 MPPTs adapt to complex solar setups
- Fast Setup
Simplified installation and AI commissioning as fast as 3 mins - Stronger Load-handling
11.5kW continuous output with PV , up to 185 A LRA - Greater capacity and expansion
15kWh per unit, up to 15 units parallel with an aGate to get 225kWh - Reliable Backup
Zero interruption and UPS-level power quality - Flexible Expansion
Compatible with V2L with aHub or generators, previous aPower models
FranklinWH aPower S Specifications
Battery & Energy Storage
Battery Chemistry: Lithium Iron Phosphate (LFP)
Usable Energy: 15 kWh per unit
System Expansion: Up to 15 units / 225 kWh per aGate
Charge Power: 8 kW continuous
Discharge Power with PV: 11.5 kW continuous
Battery-Only Discharge Power: 10 kW continuous
Round Trip Efficiency: 90.5%
Warranty: 15 years or 60 MWh throughput
SKU: APRS-10K15V1-US
AC Electrical
Nominal AC Voltage: 120/240 V, 120/208 V
Frequency: 60 Hz
Coupling: Hybrid-Coupled
Phase: 2 W + N + PE
CEC Efficiency (Solar to Home/Grid): 97.5%
Short-Circuit Current Rating: 10 kA
AC Metering: Revenue Grade, ±0.5%, ANSI C12.20
User Interface: FranklinWH App
Operating Modes: Self-Consumption, Time of Use, Emergency Backup
Solar PV Input
Maximum Solar STC Input: 20 kW
PV DC Input Voltage Range: 60–600 Vdc
MPPT Voltage Range: 90–480 Vdc
MPPTs: 4
Maximum Current per MPPT: 15 A
Maximum Short-Circuit Current per MPPT: 20 A
Maximum Power per MPPT: 5 kW
Maximum Continuous Total MPPT Output: 15 kW
Backup & Off-Grid
Peak Output Power: 15 kW for 10 seconds
Transient Load Capacity: 25 kW for 1 second
Load Start Capability: 185 A LRA
Load Imbalance Ratio: 100%
THDU: <1%
Voltage Regulation Accuracy: ±1%
Frequency Accuracy: ±0.1 Hz
Mechanical
Dimensions (H × W × D): 45.2 × 29.5 × 11.8 in (1149 × 750 × 300 mm)
Weight: 388 lb (176 kg)
Weight Without Cover: 365 lb (166 kg)
Mounting: Wall or Floor Mount
Cooling: Natural Cooling
Environmental
Installation: Indoor / Outdoor
Enclosure Type: Type 3R
Ingress Protection: IP55 (Wiring), IP67 (Battery Pack & Inverter)
Operating Temperature: -4°F to 122°F (-20°C to 50°C)
High-Temperature Operation: Up to 131°F (55°C), derated output
Humidity: Up to 100% RH, condensing
Maximum Altitude: 9,843 ft (3,000 m)
Certifications
UL9540, UL9540A, UL1973, UL1741, UL1741 SB, UL1741 PCS, UL1741 Multimode, UL1741 CRD, UL3141, UL1699B, UL1998, UN38.3, IEEE 1547, IEEE 1547.1, CSA 22.2 No.107.1
Download
Datasheet
FranklinWH aPower S datasheet
User manual
aPower S Installation Guide
Certification
aPower UL9540A
aPower UL9540
aPower UL1741
Warranty
aPower S Warranty
About FranklinWH
FranklinWH is focused on home energy management and storage solutions that provide safety, reliability and energy freedom for homes. The FranklinWH System integrates solar, battery, grid, generator and EV power sources, intelligently managing them to optimize energy supply for maximum efficiency and security. Designed with simplicity in mind, the system is easy to install, operate, and maintain, making home energy management and storage accessible for every home.
FranklinWH Energy Storage is the manufacturer of the FranklinWH System. FranklinWH is a market-oriented, research-driven company focused on next-generation residential energy management and storage solutions. Headquartered in the San Francisco Bay Area, FranklinWH's team has decades of experience in energy systems, from design, through manufacturing, to sales and installation. FranklinWH is AVL-listed with multiple financial institutions.
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