GivEnergy Battery Modules — Specs, Stacking & Support Guide
GivEnergy lithium battery modules in 2.6 kWh, 5.2 kWh, 5.12 kWh Gen 3, 8.2 kWh, and 9.5 kWh — specifications, stacking rules, BMS behaviour, temperature limits, warranty, and common fault diagnosis.
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GivEnergy battery issues — not charging, low capacity, BMS faults, or CAN communication errors — are usually diagnosable from portal data without a site visit.
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GivEnergy battery module specifications
| Module | Nominal capacity | Usable capacity | Voltage | Chemistry |
|---|---|---|---|---|
| 2.6 kWh | 2.6 kWh | ~2.1 kWh (80% DoD) | 51.2 V nominal | LiFePO₄ |
| 5.2 kWh | 5.2 kWh | ~4.2 kWh (80% DoD) | 51.2 V nominal | LiFePO₄ |
| 8.2 kWh | 8.2 kWh | ~8.2 kWh (100% DoD) | 51.2 V nominal | LiFePO₄ |
| 9.5 kWh | 9.5 kWh | ~9.5 kWh (100% DoD) | 51.2 V nominal | LiFePO₄ |
| 5.12 kWh Gen 3 | 5.12 kWh | ~5.12 kWh (100% DoD) | 51.2 V nominal | LiFePO₄ |
All GivEnergy batteries use lithium iron phosphate (LiFePO₄) chemistry — safer and more thermally stable than NMC lithium cells, with a longer cycle life (typically 4,000–6,000 cycles to 80% capacity).
Detailed module specifications
| Module | Weight | Dimensions | Max current | IP rating | Stacking limit |
|---|---|---|---|---|---|
| 2.6 kWh Gen 1 | 35.5 kg | 299×205×480 mm | 30A | IP65 | Stackable |
| 5.2 kWh Gen 1 | 63 kg | 515×223×480 mm | 50A | IP65 | Stackable |
| 8.2 kWh Gen 1 | 103 kg | 669×223×480 mm | 80A | IP65 | Stackable |
| 9.5 kWh Gen 2 | 110 kg | 800×242×480 mm | 80A | IP65 | Stackable |
| 5.12 kWh Gen 3 | 48±2 kg | 338×242×480 mm | 60A (cont.), 120A (peak) | IP65 | Up to 5 |
| 9.5 kWh Gen 3 | 85±2 kg | 576×225×480 mm | 120A continuous | IP65 | Up to 5 |
Operating conditions
Communication
Stacking multiple battery modules
One of the key advantages of the GivEnergy modular system is the ability to add batteries over time. Modules are mounted on a wall-mounted rail and connected in a CAN daisy chain — the inverter communicates with each module individually for balancing and monitoring. Adding capacity is a single engineer visit, not a system replacement.
Rules for stacking
GivEnergy do not support mixing different-capacity modules in the same stack (e.g. one 5.2 kWh and one 9.5 kWh module). All modules in a stack should be the same size for correct BMS balancing. If you expand in future, purchase the same module size as your existing batteries.
Each inverter model has a maximum supported battery capacity — typically stated in the inverter datasheet. Do not exceed this limit. Connecting more battery capacity than the inverter supports can cause BMS communication errors and may void warranty. Check your inverter model's datasheet or contact GivEnergy support before purchasing additional modules.
Each module is connected to the next via a CAN cable (daisy chain). The final module in the stack must have a CAN termination resistor fitted. If this is not done correctly, the inverter may fail to communicate with some modules — showing partial battery readings or BMS errors. This is an installation responsibility — carried out by the installer.
After adding modules, check the portal to confirm all modules are visible. Each module appears individually in the battery monitoring section. If a module is missing from the portal view, it typically indicates a CAN cable fault, incorrect termination, or a BMS communication failure on that module.
BMS behaviour — what it controls and why
Each GivEnergy battery module contains its own Battery Management System (BMS). The BMS monitors cell voltage, temperature, and current — and actively protects the cells from conditions that could cause damage or reduce lifespan. Understanding BMS behaviour helps explain why the battery sometimes refuses to charge or discharge, even when the system appears set up correctly.
What the BMS protects against
BMS status in the portal
The GivEnergy portal shows battery-level information including SoC, temperature, and fault codes for each connected module. Navigate to My Inverter → Event Log to see BMS events.
Temperature and installation location
GivEnergy batteries are rated for indoor installation. The operating temperature range for charging is 0°C to 50°C for Gen 3 models and 0°C to 55°C for Gen 1/2 models. Installations in unheated garages, outbuildings, or loft spaces can experience temperatures outside this range — particularly in winter — leading to charging suspensions or, in extreme cases, hardware damage.
Low temperature (winter)
When battery cell temperature drops below approximately 0°C, the BMS blocks all charging — including from solar and the grid. Discharging can continue at lower temperatures. The suspension is automatic and temporary — charging resumes once temperature rises above the threshold.
High temperature (summer)
At high cell temperatures (above approximately 45°C), the BMS reduces charge rate and may suspend charging to protect the cells. Loft installations in poorly ventilated spaces can reach dangerous temperatures in summer — this is not a recommended location. The BMS will log over-temperature events in the portal event log.
Recommended installation locations
How GivEnergy battery modules are installed
Battery module installation involves wall-mounting a rail system, securing the modules to the rail, connecting DC power cables, and daisy-chaining CAN communication cables between modules. All of this is a qualified installer task. What follows is an overview to help you understand what's involved — not instructions for self-installation.
What the installation involves
Weight and structural considerations
GivEnergy battery modules are heavy — a 9.5 kWh Gen 3 module weighs approximately 85 kg. A stack of three 9.5 kWh modules approaches 255 kg on a single wall. The installer must confirm the wall can safely support this load before installation.
Stud partition walls, older lath-and-plaster, or cavity walls without adequate noggins may not be suitable without additional structural support. A solid brick or block wall is the preferred mounting surface.
Common GivEnergy battery faults
Most GivEnergy battery faults are diagnosable from portal data. Here are the most common issues and where to look for the cause.
Battery not charging
Most commonly a settings issue — wrong system mode, battery paused, SoC already at maximum, or temperature lockout. See the dedicated fault guide for a complete diagnostic flow.
→ Battery not charging overnight guide → Battery not charging from solar guideCAN communication fault
Inverter loses communication with one or more battery modules. Usually a CAN cable fault, loose connector, or incorrect termination. Portal shows the affected module as offline or shows comms error codes in the event log.
→ CAN communication fault guideBattery capacity declining
Some gradual capacity loss over years is normal (LiFePO₄ typically retains 80% capacity at 4,000 cycles). Sudden or steep capacity loss may indicate a BMS fault, cell imbalance, or damage. Check the portal for cell voltage readings and any BMS event codes.
Red or amber LED on battery
LEDs on the battery front panel indicate the module's status. Green = operating normally; amber = warning condition; red = fault. Check the portal event log for the associated fault code. Do not open the battery enclosure.
→ Hardware diagnostics and LED guideGivEnergy battery warranty — what's covered
GivEnergy battery modules typically carry a 12-year warranty. The warranty covers manufacturing defects and includes capacity retention guarantees — the battery should retain at least 70–80% of its original capacity at the end of the warranty period (exact percentage varies by product generation and warranty terms).
What's typically covered
What's typically not covered
The inverter that these modules connect to — specs, setup, and common issues.
Diagnostic guide for battery not charging from grid overnight.
Inverter losing contact with battery modules — causes and fixes.
LED status guide, restart sequence, and physical checks for GivEnergy systems.
GivEnergy battery questions
GivEnergy battery modules are available in 2.6 kWh, 5.12 kWh (Gen 3), 5.2 kWh, 8.2 kWh, and 9.5 kWh capacities. All use lithium iron phosphate (LiFePO₄) chemistry. The modules connect to GivEnergy hybrid inverters via DC power and CAN communication cables, and can be stacked to build systems up to approximately 30 kWh.
Yes — this is one of the key advantages of the Gen 3 modular system. Additional battery modules can be added to an existing stack without replacing the inverter. All modules must be the same capacity, and you must not exceed the inverter's maximum supported storage. The expansion requires a qualified installer visit to mount the additional modules, extend the CAN chain, and commission in the portal.
GivEnergy LiFePO₄ batteries are rated for typically 4,000–6,000 cycles to 80% capacity. For a typical home cycling the battery once per day, this equates to 11–16 years of useful life. The 12-year warranty includes capacity retention guarantees. Real-world longevity depends on how hard the battery is cycled — systems that discharge to a low SoC and charge back to 100% daily will accumulate cycles faster than more conservative usage.
GivEnergy batteries block charging below approximately 0°C to prevent lithium plating — a form of irreversible cell damage that occurs when lithium ions can't intercalate properly into the anode at low temperatures. This is correct BMS behaviour, not a fault. The battery will resume charging automatically once cell temperature rises above the threshold. If this happens regularly in winter, consider improving insulation around the battery installation location.
A CAN communication error means the inverter has lost contact with one or more battery modules over the CAN bus. The most common causes are a loose or damaged CAN cable connector, a broken CAN cable, missing or incorrectly fitted CAN termination resistor on the last module, or a BMS fault on a specific module. Check all CAN connectors are fully seated and that the termination resistor is present on the final module. If the error persists after reseating connections, an engineer visit is needed to diagnose whether it's a cable or module fault.
Battery fault or charging issue? We'll diagnose it.
Tell us what you're seeing — BMS errors in the portal, batteries not charging, reduced capacity, or CAN communication faults. We'll review your monitoring data and come back with a clear diagnosis.