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20kWh Solar Stacked Lithium Battery

20kWh Solar Stacked Lithium Battery Manufacturer

We are a direct manufacturer of stackable home solar energy storage systems, delivering high-power, plug-and-play stacked lithium battery solutions for residential whole-home backup, hybrid solar self-consumption, and off-grid applications.

 

Each layer provides 5.2kWh energy, and the system supports modular expansion (battery stacks) to match different household load profiles. Built with LiFePO4 chemistry, rugged structure, and app-based monitoring via Bluetooth/Wi-Fi, this platform is engineered for installers, distributors, EPCs, and global OEM/ODM partners.

 

Key positioning keywords naturally covered: power stack battery, power stack batteries, battery stack, stacked battery, stacking batteries, stacked battery pack, lithium battery stack, home grid battery stack.

Battery Manage System
Overcurrent Protection
Over-discharge Protection
Low power Protection
High-Low Temp Protection
Overload Protection
Short circuit Protection
Disconnection Protection
Universal 5 hole
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Universal std
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British std
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Key Highlights

5kW Rated Output Power (Pure Sine Wave)

supports high-load homes and multiple appliances at once

20.8912kWh Battery Capacity

long runtime with scalable expansion

LiFePO4 Cells

6,000+ cycle class for long service life

Plug-and-Play Stack Battery Design

fast installation, clean wiring, easy upgrades

Off-Grid / Grid-Tied Charging & Discharging

flexible operating modes

Bluetooth / Wi-Fi Battery Stack Monitor

real-time status via app

Advanced Battery Management System (BMS)

The built-in Battery Manage System is designed to keep the battery stack safe under heavy loads and changing climates:
BMS for 5 kW battery stacks
  • Overcurrent Protection
  • Over-discharge Protection
  • Low Power Protection
  • High / Low Temperature Protection
  • Overload Protection
  • Short-Circuit Protection
  • Automatic Disconnection Protection
This is especially critical for high-power scenarios like air conditioning, pumps, and mixed household loads.

Mobility + Emergency-Ready Design

Mobility + Emergency-Ready Design

easy to move indoors/outdoors

Built for power outages

stable backup power without complicated rewiring

Flexible use

stack your batteries anywhere you need energy resilience

Off-Grid & Hybrid Solar Operation

Want to go off-grid? It’s simple:
LOADING...
GRID STABLE
Supports simultaneous charging and discharging, maximizing solar self-consumption and energy independence.

Core Advantages

Quick Installation

Stackable architecture reduces installation time and simplifies upgrades.

Smart Monitoring

Bluetooth/Wi-Fi app monitoring improves after-sales service and troubleshooting.

High Cycle Life

LiFePO4 chemistry supports long-term daily cycling and backup readiness.

Advanced Structure

Optimized internal structure for higher density within a consistent footprint.

Deep Customization (OEM/ODM)

Factory-direct customization and design support for global partners.

Device Compatibility

Designed to integrate with most home energy storage ecosystems.

Applications

20kW Stacked Whole-House Backup Power

Whole-House Backup Power (High-Load Homes)

With 5kW AC output, the system is suitable for households that want fewer compromises during outages—more circuits can stay on, including higher-demand appliances.

20kW Stacked Off-Grid & Hybrid Solar Operation

Off-Grid / Hybrid Solar Operation

Connect PV → charge the stacked battery pack → power loads day and night. The system supports charging and discharging at the same time, improving solar self-consumption.

Flexible Mobility & Emergency Readiness

Rugged design for emergencies. (If your configuration includes handle + rollers like your other SKUs, it’s easy to move and position where needed.)

OEM & ODM Support

OEM/ODM Capabilities (For Distributors & Brands)

We support deep customization for power stack battery programs:

Enclosure and structural customization
Branding, labeling, and packaging design
Wiring harness / connector / output options (project-based)
Manuals, marketing assets, and dealer kit support
Automated Production Line for Solar Battery Pack

Parameters

Battery Battery Capacity20.88kWh
Battery Rated Voltage51.2V
Battery Cycle LifeLiFePO4, ≥ 6000 cycles, 70% SOH, 25°C
Battery Charge/Discharge Current100A
Battery Dimensions600×430×150 mm
Battery Weight46.9 kg
Inverter Rated AC Output Power5kW
Inverter AC Output Voltage220V (Optional)
Inverter AC Output Frequency50Hz (Optional)
Inverter AC Rated Input Voltage220V (Optional)
Inverter AC Input Power3000W
Inverter Grid TypeOff-grid/ On-grid
Inverter DisplayLCD
Inverter CommunicationRS485
Inverter Operating Temperature-10°C ~ 60°C
Inverter Dimensions600×430×204 mm
Inverter Weight16.4 kg
Base Dimensions600×430×152 mm
Base Weight9.3 kg
Certificates

Certificate

Pre-integrated UN38.3, MSDS, UL, CE, FCC, IEC, RoHS and other certifications to shorten market access cycles.
MSDS
UN38.3
UL
UL
Identification and Classification Report for Air Transport of Goods
Report for Safe Transport of Goods
Material Safety Data Sheet
UN38.3

About us

Founded in 2016 · Headquartered in China

A decade of energy storage manufacturing excellence.

Who We Are

Residential Solar Energy Storage Battery Solution Manufacturer

TURSAN is a high-tech enterprise integrating R&D, manufacturing, and global sales of lithium battery–based energy storage systems. Founded in 2016, we operate a 20,000+m² production facility producing reliable LiFePO4 power solutions for residential, commercial, and outdoor applications.

 

Through a strategic partnership with BYD, we co-manufacture larger-capacity, safer, and more environmentally friendly portable power stations and home battery backups. Today we serve global brand owners, distributors, EPC contractors, and project developers in over 60 countries — saving OEM clients up to 20% in annual sourcing cost while meeting the toughest international safety standards.

Home Battery Backup
Portable Power Station
Industrial BESS
Mobile EV Charging
LiFePO4 Battery
Off-Grid & Hybrid Inverter

OEM&ODM Process

Phase 1

Confirm Requirements and Finalise the Solution

We collect all customer specifications: voltage, capacity, dimensions, communication protocol, etc. Then we decide if it is a pure OEM job (build exactly to your drawings) or an ODM job (we provide the design). We issue a clear BOM (bill of materials) and 2D/3D drawings for both parties to sign off, avoiding any later misunderstandings.

Phase 1
Phase 2
Phase 2

Procurement and Incoming Inspection

We purchase all materials according to the BOM: cells, enclosure, brackets, screws, wiring, BMS boards, etc. When goods arrive, we do sampling or 100% inspection. For cells, we measure voltage, internal resistance and check appearance. For structural parts, we check dimensions and hole sizes. Any non‑conforming items are rejected and never go into our warehouse.

Phase 3

Cell Sorting and Matching

We group cells from the same batch by voltage and internal resistance values. We then match cells with the closest parameters into one set (for example, if a string uses 4 cells, the voltage and resistance differences among those 4 must stay within our set limits). This directly affects how long the battery pack will last without performance decay.

Phase 3
Phase 4
Phase 4

Laser Welding and Module Assembly

We fix cells into holders, then laser‑weld the tabs (connectors). We do pull‑force tests on sample weld spots to check strength. After that, we fasten the welded sub‑modules into the enclosure or tray, using torque‑controlled tools to apply the correct tightening force.

Phase 5

BMS Installation and Wiring Connection

We mount the main BMS and slave boards in their designated positions, then plug in all voltage sampling wires and temperature sensors. We always have a two‑person verification of the wiring sequence – this prevents reverse connections that could burn the boards when we power up.

Phase 5
Phase 6
Phase 6

First High‑Voltage Safety Test

We apply high voltage between the positive/negative terminals and the enclosure to measure insulation resistance and withstand voltage. We check for any leakage or breakdown. If this test fails, the module goes back for rework immediately – it does not move forward.

Phase 7

High‑Temperature Standing and Self‑Discharge (K‑Value) Check

We place the modules in a 45 °C room for 24–48 hours. We measure voltage before and after the standing period, then calculate the daily voltage drop (K‑value). Units with excessive drop are rejected because they indicate internal micro‑shorts that could cause early failure later.

Phase 7
Phase 8
Phase 8

Charge/Discharge Aging and Capacity Calibration

We connect the modules to charge/discharge equipment and run several full cycles at the current specified by the customer. During the process, we record actual discharge capacity, charge/discharge efficiency, and the temperature/voltage differences among individual cells. If all data stay within our acceptance limits, we calibrate the final rated capacity. If not, we isolate and analyse the failed units.

Phase 9

Final Inspection, Labelling and Packaging

We re‑measure total voltage, internal resistance and insulation performance. We check appearance for scratches, gaps, or damaged screws. We attach a permanent nameplate (with serial number), UN38.3 hazardous‑goods label, and all required operation warning labels. Then we package the battery with foam or cardboard for shock protection, as per customer requirements, and record the final weight.

Phase 9
Phase 10
Phase 10

Shipment and Document Handover

We verify the shipping quantity, address and consignee. We prepare all accompanying documents: factory test report, MSDS, UN38.3 test summary, and transport condition certificate. We arrange pickup with our logistics partner, and after dispatch we send the tracking number and estimated arrival time to the customer.

Quality Control

Frequently Asked Questions (FAQ)

A 5kW system can run most essential loads, but it depends on how many large appliances run at the same time. Power (5kW) determines what you can run simultaneously, while battery energy (20kWh) determines how long you can run it. Many homeowners still use priority circuits or load management for the heaviest loads.

A 5kW system can support refrigerators, lighting, TVs, internet, pumps, kitchen appliances, and often one air conditioner. The main constraint is the combined wattage and surge current at startup. For best results, balance large loads and avoid starting multiple motors at the same exact moment.

“5kW” refers to power output; runtime depends on battery capacity (kWh). Your model lists 20.8912kWh, so an average 2kW load could last roughly 8–10 hours, while a 5kW average load might last around 3–4 hours. Real-world results vary due to inverter efficiency and temperature.

A quick estimate is: Runtime (hours) ≈ usable kWh ÷ average kW. At a 1kW average load, ~20kWh can last about 20 hours; at 4kW, about 5 hours. Peak loads reduce runtime faster, so use your evening/night average load for more realistic planning.

It depends on household consumption. Many homes average 1–3kW overnight (higher with AC), so a ~20kWh battery may cover a full evening plus part of the next morning, or shorter if heavy cooling loads run continuously. Adding modules (battery stacks) extends runtime without changing the core system.

Pricing depends on configuration (power level 5kW, total kWh like 20kWh, certifications, monitoring, and included accessories) and whether installation is included. For B2B projects, costs are best quoted by BOM and compliance requirements. A “factory-direct” quote is typically the most accurate route for distributors and EPCs.

If you mean a 5kW PV array, divide 5,000W by panel wattage. With 400W panels, that’s about 13 panels; with 550W panels, about 9–10 panels. Roof space, shading, and local rules may affect the final design.

Charging time depends on charge power. A simple estimate: time ≈ battery kWh ÷ charging kW. With 5kW charging, ~20kWh may take around 4–5 hours, plus some tapering near full charge.

It depends on battery size and sunlight. In perfect conditions, 400W might produce ~1.6–2.0kWh over 4–5 peak sun hours, before losses. Real-world charging will be slower due to heat, angle, and conversion losses.

Panels increase generation; batteries increase usable energy at night and backup resilience. If your battery rarely reaches full, add more panels. If your battery fills early and you still buy power at night, add more battery capacity.

Start with your daily kWh usage and your peak kW demand. Decide how many hours of backup you want (essentials vs whole home). Then size energy capacity (kWh) for runtime and power (kW) for simultaneous appliance operation.

Yes, if the inverter power and surge capability match the AC requirements. Air conditioners have high startup surges, so proper sizing and wiring are essential. More battery capacity increases runtime; sufficient inverter power ensures stable operation.

Key considerations include higher upfront cost, the need for a quality BMS, correct installation, and safe charging practices. Performance can be affected by extreme temperatures, so proper placement and protection matter. Choosing LiFePO4 and a well-designed BMS reduces many risks.

Avoid poor ventilation, high heat exposure, incorrect chargers, loose connections, undersized cables, and missing protection devices. Do not bypass safety features or mix incompatible battery types. Proper installation and settings are as important as the battery itself.

Risk is low with quality cells, proper BMS protection, and correct installation, but no energy system is risk-free. Store and install batteries away from heat sources and flammable materials, use correct protection devices, and follow recommended operating temperature ranges. LiFePO4 is generally selected for better thermal stability.

Often yes. Many lithium systems benefit from avoiding long periods at 100% state of charge, especially in warm environments. Daily charge limits (e.g., 80–90%) can reduce stress and improve long-term durability.

It’s a longevity guideline suggesting daily use between roughly 40% and 80% SOC to reduce degradation. LiFePO4 is durable, but this practice can still help maximize service life. Many users charge higher only when they need maximum backup readiness.

It’s a common concept that most battery aging happens near extremes (very high or very low SOC). Many users operate mostly in the middle range and only go to full charge when needed. Settings depend on your backup goals and daily cycling pattern.

Keeping batteries at 100% for long periods—especially in heat—can accelerate aging. If the system is mainly for daily cycling, a slightly lower daily charge target may extend life. If it’s for emergency backup, staying closer to full can be reasonable, but temperature control remains important.

For some households it’s moderate; for others it’s high. Usage depends heavily on air conditioning/heating, water heating, cooking, and EV charging. If you regularly use 20kWh/day, storage can reduce peak-rate grid purchases and improve resilience.

Air conditioning/heating, water heaters, ovens/stoves, dryers, and older refrigerators/freezers are common top contributors. Long runtimes at high power matter more than short bursts. Measuring actual appliance consumption is the fastest way to identify the biggest drivers.

Often yes, especially if you consume more energy at night, face time-of-use rates, or want outage backup. A battery increases self-consumption of your solar production and can reduce reliance on the grid during peak hours. The best value comes from choosing the right kWh capacity for your evening load profile.

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2026 TURSAN Product Catalog

1 file(s) 12.81 MB
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5kW Stacked Home Battery Backup User Manual

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Partner with TURSAN, Ignite a New Chapter in Your Country's Energy Storage Business

As a professional manufacturer of solar lithium battery energy storage systems, TURSAN is dedicated to providing the global market with high-quality home energy storage batteries, inverters, portable power stations, and all-in-one storage solutions. We now sincerely invite you to become our exclusive partner in your country or region, to jointly develop the clean energy storage market and create steadily growing business value.

Market Protection

Exclusive Regional Authorization

After signing the agreement, we will cease wholesale distribution to other clients in your region, fully safeguarding your market interests.

Fast Fulfillment

Priority Order Processing & Shipping

Ensure you can respond to local demand immediately and capture time‑sensitive market opportunities.

Brand Ownership

Product Customization Support

From your first order, we can design and produce energy storage systems completely tailored to your brand.

Full Coverage

Comprehensive Product Range Suppor

From home storage and portable power to inverters and all-in-one units with built-in inverters — meeting diverse application needs.

Global Trust

Proven Success in 30+ Countries

We have already helped partners worldwide achieve measurable brand growth and increased profitability.

Partner Flexibility

Your Most Reliable Backend

Whether you are a systems integrator, electrical distributor, or building your own brand, you get stable products and flexible cooperation mechanisms.

📩 Contact us now to receive a customized partnership proposal and product information.
Let’s join hands to bring reliable power solutions to homes and businesses, and co-create a green energy future together!

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