28kWh Stackable LiFePO4 Battery Module

As a trusted supplier to the UK market, Sinoah Energy stocks this battery module in our UK warehouse for fast delivery to installers and trade partners nationwide. Featuring genuine LFP chemistry, 8000+ cycle life, IP66 weatherproof rating, and self-heating technology for -20°C charging, the 28kWh Stackable LiFePO4 Battery Module delivers the capacity and reliability that UK homes with heat pumps, electric vehicles, and high daily consumption demand.

The Growing Energy Demand: Why 28kWh Is Becoming the New Standard

UK homes are consuming more electricity than ever before. Air-source heat pumps are replacing gas boilers. Electric vehicles are appearing on driveways. Induction hobs, tumble dryers, and home offices are adding to daily consumption. A typical 3–4 bedroom home with an EV and a heat pump now consumes 6,000–8,000kWh annually–double the UK average of 2,700kWh.

For these households, a 14kWh battery–while adequate for basic solar self-consumption–often falls short. During winter months, when solar generation drops to 3–5kWh per day, a 14kWh battery can cover evening consumption but leaves little margin for EV charging or extended grid outages. During summer, a 14kWh battery fills early in the day, leaving excess solar generation exported to the grid at low rates.

The 28kWh Stackable LiFePO4 Battery Module addresses this gap. With 27.57kWh of usable energy (98% depth of discharge), it provides the capacity that modern UK homes actually need. A full 28kWh charge stored overnight on Octopus Go (9p/kWh) costs £2.52 and can power an average home for 24-36 hours–or add 80-100 miles of EV range, run a heat pump through a winter night, and keep the lights on during an outage, all simultaneously.

What’s Inside: Two 14kWh Modules, One Integrated System

TheSinoah 28kWh Stackable LiFePO4 Battery Module is formed by stacking two 14kWh units (or four 7kWh units. In the following text, two 14kWh units are taken as an example) in a single floor-standing enclosure. Each 14kWh sub-module contains prismatic LFP cells configured to deliver 350V nominal system voltage with an operating range of 200-500V.

The two sub-modules are connected internally via pre-wired power and communication cables, presenting a single interface to theSinoah hybrid inverter. For installers, this means the 28kWh module installs exactly like a 14kWh unit–just larger and heavier–with the same CAN communication protocol and plug-and-play connectivity.

This two-module configuration offers a practical advantage: if a fault develops in one sub-module (rare, given the 10-year warranty), the installer can swap out the affected unit without replacing the entire 28kWh stack. This modularity reduces long-term service costs and simplifies maintenance.

Built for UK Winters: Self-Heating and IP66 Protection

The Sinoah 28kWh Stackable LiFePO4 Battery Module carries an IP66 ingress protection rating–fully protected against dust and powerful water jets from any direction. This means it can be installed outdoors on external walls, in carports, or in garden buildings without concern about driving rain, snow, or coastal salt spray.

Perhaps more importantly for UK installations, the module features self-heating technology that enables charging at temperatures as low as -20℃. In a UK winter, garages and external installations can easily drop below freezing–a condition that would prevent many standard lithium batteries from charging. The NeoVolt 28kWh module automatically activates its heating system when temperatures fall, ensuring the battery remains operational throughout the year. For homeowners in Scotland, northern England, or rural areas with exposed installations, this feature is a significant practical advantage.

The operating temperature range covers charging from -20℃to +50℃and discharging from -20℃ to +50℃–making the module suitable for any UK location, from a Northumberland winter to a London heatwave.

Real-World Application: The All-Electric Home with EV

Consider a 4-bedroom detached home in the South East with an 8kWp solar array, a 9kWh air-source heat pump, and an electric vehicle. The household consumes approximately 7,500kWh annually–4,000kWh for the home, 2,000kWh for the heat pump, and 1,500kWh for the EV.

With a 14kWh battery, the family would face a daily juggling act. During summer, the battery fills by midday, leaving afternoon solar generation exported. During winter, the battery barely covers evening consumption, with the heat pump drawing heavily overnight.

The 28kWh Stackable LiFePO4 Battery Module changes the equation entirely:

Summer scenario–The 8kWp array generates 25-30kWh on sunny days. The 28kWh battery stores the full surplus (15-20kWh) for evening use, EV charging, and overnight heat pump operation. Grid import drops to near zero on sunny days.

Winter scenario–Solar generation drops to 3-5kWh per day. The 28kWh battery charges overnight on the Octopus Go rate (9p/kWh) and discharges during peak periods (28p/kWh). The heat pump draws 6-8kWh overnight–the 28kWh battery handles this comfortably, with 19-21kWh remaining for daytime use. 

Annual savings–Combined solar self-consumption and tariff optimisation deliver £1,000–£1,400 in annual bill savings.

From an Installer’s Perspective: What Makes the 28kWh Module Different

We asked a UK MCS-certified installer who has fitted over 30 NeoVolt battery systems what makes the 28kWh module stand out.

“The 28kWh module is heavy–around 224kg–but the floor-stacked design makes it manageable. Two people can position it on a concrete floor, garage slab, or suitably reinforced surface. The pre-wired internal connections mean I don’t need to cable two separate modules together–it’s one unit with one set of connections. That saves me about 45 minutes compared to installing two 14kWh modules separately.”

Weight and handling–At 224kg for the G3 version and 246kg for the G4 version, the 28kWh module requires two people for positioning. The 690mm width and floor-stacked design mean no wall-mounting complications–no need to find studs, no concerns about wall strength.

Cable management–Single power and communication cable sets–the internal connections are pre-wired, reducing on-site wiring time.

Commissioning–The inverter’s LCD display and NeoVolt App auto-detect the 28kWh configuration. Commissioning adds less than 30 minutes to the overall job.

Future service–The modular design means individual 14kWh sub-modules can be serviced or replaced without taking the entire 28kWh system offline.

Safety: Six Layers of Protection

Thet 28kWh Stackable LiFePO4 Battery Module incorporates a six-layer safety protection system:

1. Cell-Level Protection–Each prismatic LFP cell is individually monitored for voltage and temperature.

2. Module-Level BMS–The built-in Battery Management System balances cells, prevents over-charge and over-discharge, and communicates faults to the inverter.

3. Pack Over-Voltage / Under-Voltage Protection–Automatic disconnection if voltage strays outside the 200–500V operating range.

4. Temperature Monitoring–Multiple sensors across the module detect over-temperature conditions.

5. Short Circuit and Over-Current Protection–The BMS responds to fault currents within milliseconds.

6. Communication Redundancy–CAN bus provides real-time data to the inverter; if communication is lost, the system defaults to safe mode.

For installers, this means fewer callbacks and warranty claims. For homeowners, it means peace of mind.

Technical Specifications

Why Choose the 28kWh from Sinoah Energy

1. Genuine LFP Chemistry–Prismatic LFP cells with verified 8000+ cycle life and safety certifications.

2. UK Stock, Fast Delivery–Sinoah Energy maintains inventory in our UK warehouse, meaning no shipping delays or customs clearance issues.

3. Factory Direct Pricing–As a direct supplier from NeoVolt’s manufacturing facility, we offer competitive trade pricing without middlemen.

4. 10-Year Warranty–The 28kWh battery module comes with a 10-year warranty–among the longest in the UK residential storage market.

5. Technical Support–Our UK-based team provides pre-sales consultation, installation guidance, and after-sales support.

6. Self-Heating for UK Winters–Charges at -20℃ –a practical feature for UK installations in garages, outbuildings, or external locations.

7. IP66 Weatherproof–Suitable for indoor or outdoor installation in any UK weather.

8. VPP and FCAS Ready–Compatible with Virtual Power Plant and Frequency Control Ancillary Service programmes.

Ready to add the 28kWh stackable battery module to your product range?

Contact us and become a trade partner today and access competitive pricing, UK stock, and dedicated technical support.

FAQ:

Q1: Is 28kWh enough for a typical UK home?

A: For most UK households, yes.The average UK home uses 8–10kWh per day. A 28kWh battery provides 2–3 days of backup without solar input.

Q2: Does the battery work in winter when temperatures drop below freezing?

A: Yes – this is a key feature. The module has self-heating technology that enables charging at temperatures as low as -20°C. When temperatures fall, the system automatically activates its heating function, ensuring the battery remains operational throughout UK winters – unlike many standard batteries that stop charging below 0°C.

Q3: Can I add more capacity to the 28kWh system later?

A: Yes. The system is fully scalable – you can add one or two more 14kWh modules (up to 56kWh total) as energy needs grow. The modular stackable design means no rewiring or system replacement – simply add modules on top and plug in the pre-made cables.