48V 300Ah LiFePO4 15kWh Battery for Residential ESS
The BSLBATT B-LFP48-300PW is a 15kWh wall-mounted LiFePO4 home battery with 51.2V nominal voltage and 300Ah rated capacity. It delivers 14.59 kWh of usable energy at 95% depth of discharge and supports over 8,000 charge/discharge cycles at 25°C, providing a design life exceeding 15 years. Up to 32 units connect in parallel for a maximum system capacity of 491.52 kWh. The built-in BMS supports RS485, CAN, WiFi, and Bluetooth for plug-and-play integration with 40+ hybrid inverter brands.
How Does the B-LFP48-300PW 15kWh Battery Work?
The B-LFP48-300PW stores energy from your solar panels during the day and releases it when your household needs it most, whether at night, during peak electricity rate hours, or during grid outages. Built around a 16S1P cell configuration using EVE A+ Tier LiFePO4 prismatic cells, the battery delivers a stable discharge voltage of 47V to 55V across its full operating range.
During a typical day, the battery charges from your solar system through a compatible hybrid inverter. The intelligent BMS continuously monitors cell voltage, temperature, and current, automatically balancing cells to maintain optimal performance. With a 160A rated charge current and 200A rated discharge current, the B-LFP48-300PW can handle high-demand appliances including air conditioners, water heaters, and EV chargers. At a continuous 1 kW household load, a single fully charged unit provides approximately 14.5 hours of backup power.
Why Choose BSLBATT 15kWh Battery?
Compatible with 40+ Inverters
32-Unit Parallel Expansion, Up to 491.52 kWh
15.36 kWh Total · 14.59 kWh Usable at 95% DoD
16 Cell Pack with the Voltage 51.2V
Over 15 Years Design Life
10-year Battery Warranty
WiFi + Bluetooth + RS485 + CAN Communication
Tier One A+ LiFePO4 Battery
200A Rated Continuous Discharge
Over 8,000 Cycles of Life
High Energy Density of 113.8Wh/Kg
On-Grid, Off-Grid & Hybrid Solar Systems
Specifications & Technical Details
Model: B-LFP48-300PW
Rated Capacity: 300Ah
Rated Voltage: 51.2V
Total Energy: 15.36 kWh
Cell Type: LFP - Lithium Iron Phosphate
Cycle Life: >8000 Cycles @95% DOD
Charge Current: 160A
Discharge Current: 200A
Operating Temperature Range: -20°C to 55°C
Ingress Protection: IP20
Breaking Capacity Limitations to Meet the
Whole Family's Energy Needs
Core Issues
Limited Backup Duration: Many 5kWh or 10kWh batteries cannot sustain essential loads through a full night or extended outage, forcing homeowners to ration power or restart generators.
Underutilized Solar Production: Smaller batteries fill up before midday, causing excess solar energy to be exported at low feed-in tariff rates instead of being stored for evening self-consumption.
Complex Multi-Unit Wiring: Achieving 15kWh with multiple smaller modules requires extra cabling, bus bars, and BMS coordination, increasing installation cost and potential failure points.
BSLBATT 48V 300Ah Solution
14.5 Hours of Whole-Home Backup at 1 kW: The 300Ah capacity stores enough energy to power refrigerators, lights, routers, and security systems through overnight outages without rationing. For critical loads averaging 500W, runtime extends to approximately 28 hours.
Capture More of Your Solar Production: The large 15.36 kWh storage capacity absorbs the full daily output of a 5kW to 8kW solar array, maximizing self-consumption ratios above 80% and reducing grid dependence to a minimum.
Single-Unit Simplicity, 16S1P Design: One battery replaces three 5kWh modules. Fewer connection points, one BMS, one communication cable to the inverter. Installation time drops and long-term reliability improves compared to parallel small-unit setups.
Who Is the 15kWh 48V 300Ah Home Battery For?
- Solar Installers and System Integrators who need a large-capacity single-unit battery that simplifies wiring, reduces installation labor, and scales easily with parallel expansion for projects ranging from 15 kWh to 491 kWh.
- Distributors and Resellers looking for a proven 15 kWh platform with OEM/ODM customization options, including private label branding, custom BMS protocol matching, and regional certification support.
- Homeowners with High Energy Consumption who run multiple air conditioners, electric water heaters, or EV chargers and need overnight backup that smaller 5 kWh or 10 kWh batteries cannot provide.
- Off-Grid and Hybrid System Builders in regions with unreliable grid power, frequent load shedding, or high electricity tariffs, where maximizing solar self-consumption and overnight autonomy is the primary design goal.
Compatible Inverter Brands
The B-LFP48-300PW's built-in BMS supports adaptive communication protocols (RS485, CAN, RS232) for plug-and-play integration with 40+ hybrid inverter models. The following brands have been tested and officially approved for use with BSLBATT 48V wall-mount batteries:
Victron Energy · Deye · Sunsynk · Goodwe · Solis · Growatt · SolaX Power · Lux Power · SAJ · Studer Innotec · TBB · Phocos · Afore
For the full compatibility list including specific inverter model numbers and protocol settings, download our Inverter Matching List PDF.
Not sure if your inverter is compatible? Contact our technical team with your inverter model number and we will confirm protocol settings within 24 hours.
Factory-Direct Pricing & OEM Services
BSLBATT manufactures the B-LFP48-300PW in-house at our 30,000 m² production facility in Huizhou, China. By sourcing directly from the manufacturer, distributors and installers eliminate intermediary markups and gain access to competitive wholesale pricing, flexible MOQs, and dedicated technical support.
OEM & ODM Services Available:
Custom BMS protocol matching for unlisted inverter brands · Private label branding with your company logo on enclosure, LCD screen, and packaging · Custom color options for enclosure panels · Voltage, capacity, and communication parameter adjustments · Regional certification support (CE, IEC 62619, UN38.3, CEC Australia)
How to Get a Quote:
Submit your project requirements including quantity, target market, preferred certifications, and any customization needs. Our sales team responds with a detailed quotation within 24 hours.
B-LFP48-300PW vs Li-Pro StyX: Which Wall Battery Is Right for You?
BSLBATT offers two wall-mount battery options in the 15-16 kWh range. Here is how to decide which one fits your project:
| Feature | B-LFP48-300PW | Li-Pro StyX |
|---|---|---|
| Total Energy | 15.36 kWh | 16.08 kWh |
| Rated Capacity | 300Ah | 314Ah |
| IP Rating | IP20 (Indoor) | IP65 (Indoor/Outdoor) |
| Max Parallel Units | 32 (491.52 kWh) | 15 (240 kWh) |
| Depth of Discharge | 95% | 95% |
| Fire Suppression | N/A | Built-in Aerosol Fire Extinguisher |
| Mobility | Mobile Wheels Included | Floor-standing or Wall-mount |
| Best For | Indoor installations, garages, utility rooms; large-scale parallel systems | Outdoor wall-mount, harsh environments, premium residential projects |
Choose the B-LFP48-300PW if you are building large indoor systems that may scale to 200+ kWh, or if you need the flexibility to reposition the battery after installation. It supports over twice the parallel units of the Li-Pro StyX, making it the better platform for commercial-scale residential or small C&I projects.
Choose the Li-Pro StyX if your installation is outdoors, exposed to weather, or requires an integrated aerosol fire suppression system for code compliance.
Frequently Asked Questions: B-LFP48-300PW 15kWh Home Battery
Q1: How long will the B-LFP48-300PW power my home during an outage?
At a continuous household load of 1 kW (covering refrigerator, lights, router, and phone chargers), a single fully charged B-LFP48-300PW provides approximately 14.5 hours of backup power. At 500W load, runtime extends to about 28 hours. At higher loads of 2 kW (adding a small air conditioner), runtime is approximately 7 hours. These estimates assume 95% depth of discharge.
Q2: How many solar panels do I need to charge the B-LFP48-300PW?
At 4 peak sun hours per day and 80% overall system efficiency, 12 to 14 solar panels rated at 400W each will fully charge a 15 kWh battery in a single day. In regions with higher solar irradiance (5+ peak hours), 10 to 12 panels may be sufficient.
Q3: Can I connect multiple B-LFP48-300PW units together?
Yes. Up to 32 B-LFP48-300PW units can be connected in parallel, scaling total system capacity from 15.36 kWh to 491.52 kWh. Each unit's BMS communicates independently with the inverter via CAN or RS485. No additional master controller is required for parallel operation.
Q4: What is the difference between the B-LFP48-300PW and the B-LFP48-300E rack-mount battery?
Both use 300Ah LiFePO4 cells with the same voltage and capacity. The B-LFP48-300PW is a wall-mount/floor-standing unit with integrated wheels, designed for residential and small commercial spaces.The B-LFP48-300E is a 5U rack-mount format designed for 19" server rack cabinets, typically used in telecom rooms, data centers, and structured commercial installations.
Q5: Is the B-LFP48-300PW compatible with my inverter?
The battery is pre-configured for plug-and-play operation with 40+ inverter brands including Deye, Victron Energy, Goodwe, Sunsynk, Solis, Growatt, SolaX Power, Lux Power, SAJ, Studer Innotec, TBB, Phocos, and Afore. Communication protocols include RS485, CAN, and RS232. Contact us with your inverter model for confirmation.
Q6: Does BSLBATT offer OEM and private label services for the B-LFP48-300PW?
Yes. BSLBATT supports full OEM/ODM customization including private label branding, custom BMS protocols for unlisted inverter brands, color customization, and regional certification packages (CE, IEC 62619, UN38.3, CEC Australia). Minimum order quantities are flexible. Contact our sales team for details.
Q7: What warranty does the B-LFP48-300PW carry?
The B-LFP48-300PW comes with a 10-year product warranty covering manufacturing defects and capacity fade below 80% of original rated capacity under normal operating conditions. The design life exceeds 15 years at 25°C.
Q8: Can the B-LFP48-300PW be installed outdoors?
The B-LFP48-300PW has an IP20 protection rating and is designed for indoor installation, such as garages, utility rooms, or enclosed equipment rooms. For outdoor installations, BSLBATT recommends the Li-Pro StyX series with IP65 protection, which is rated for direct exposure to rain, dust, and temperature extremes.
| Model | B-LFP48-300PW | |
| Battery Type | LiFePO4 | |
| Nominal Voltage (V) | 51.2 | |
| Cell Model (Ah) | 300 | |
| Nominal Capacity (wh) | 15360 | |
| Usable Capacity (wh) | 14592 | |
| Cell & Method | 16S1P | |
| Dimension (H*W*D) | 844*510*240 mm | |
| Weight (Kg) | 135 | |
| Discharge Voltage (V) | 47 | |
| Charge Voltage (V) | 55 | |
| Charge | Rated Current / Power | 160A / 8.192kW |
| Peak Current / Power | 210A / 10.752kW, 1s | |
| Discharge | Rated Current / Power | 200A / 10.24kW |
| Max.Current / Power | 220A / 11.264kW, 1s | |
| Peak Current / Power | 250A / 12.80kW, 1s | |
| Communication | RS232, RS485, CAN, WIFI, Bluetooth | |
| Depth Of Discharge | 95% | |
| Expansion | Up to 32 units in parallel | |
| Working Temperature | Charge | 0~55 ℃ |
| Discharge | -20~55 ℃ | |
| Storage Temperature | 0~35 ℃ | |
| Cooling Type | Nature | |
| Protection Level | IP20 | |
| Warranty | 10 Years | |
| Design Life | >15 Years (25 ℃ / 77 ℉) | |
| Cycle Life | ＞8000 cycles, 25±2 ℃, 0.5C charge, 0.5C discharge | |
