Description
Growatt APX 5.0M-B3 – energy storage battery 5 kWh
Growatt APX 5.0M-B3 is a high-voltage (HV) energy storage battery (LiFePO4 cells) with a capacity of 5 kWh from the Growatt.tech range. This model is the Master module of the APX Gen 2.0 high-voltage (HV) LiFePO4 energy storage system. It stores surplus solar energy and releases it in the evening and in backup mode, working with three-phase MOD-HU hybrid inverters. The Master takes over the role of the battery management system for the whole stack, so no separate power module is needed. An energy storage battery is matched to an inverter of the same voltage class — in this case: three-phase Growatt MOD-HU hybrid inverters (APX Gen 2.0 systems).
This page gathers the complete information about the model: how it works, compatible inverters, expansion options, the full specification from the manufacturer’s datasheet and capacity sizing. All parameters come from official Growatt documentation — we list them to make selection easier and to avoid mistakes at purchase. If questions remain after reading, our technical team will help match the energy storage battery to your inverter, the capacity to your energy use and the remaining components of the PV installation — write to info@growatt.tech.
This is the Master module of the APX Gen 2.0 system. Every stack needs exactly one Master: it acts as the battery management system for the whole battery and communicates with the inverter. On its own it already forms a working 5 kWh battery.
Expert commentary
“The Growatt APX 5.0M-B3 is a solid high-voltage (HV) LiFePO4 energy storage battery, which we recommend for extending a PV installation with higher self-consumption and backup power. The key point at purchase is matching the battery’s voltage class to the inverter — we are happy to verify the pairing with your system and help size the capacity for your real energy use.”
— Growatt.tech technical team
How the Growatt APX 5.0M-B3 energy storage battery works
Growatt APX 5.0M-B3 is the Master module of the APX Gen 2.0 high-voltage (HV) LiFePO4 energy storage system. It stores surplus solar energy and releases it in the evening and in backup mode, working with three-phase MOD-HU hybrid inverters. The Master takes over the role of the battery management system for the whole stack, so no separate power module is needed.
In practice, an energy storage battery increases the self-consumption of your solar power: instead of exporting surplus energy to the grid at a low price and buying it back at a higher price in the evening, you use your own energy when you need it. Combined with a hybrid inverter, the energy storage battery also provides backup power for key circuits during a grid outage.
Who this energy storage battery is for
- PV system owners maximising self-consumption — an energy storage battery shortens the payback time of the installation.
- Homes and businesses with a hybrid inverter of the matching voltage class.
- Anyone who needs backup power during interruptions in the electricity supply.
- Installations expanded in stages — you add capacity as your needs grow.
Key features
- LiFePO4 cells — safe and durable.
- Integrated BMS — voltage and temperature protection plus cell balancing
- Modular design — easy capacity expansion
Compatible inverters and accessories
Growatt APX 5.0M-B3 is a high-voltage (HV) energy storage battery, designed to work with: three-phase Growatt MOD-HU hybrid inverters (APX Gen 2.0 systems). Battery management relies on the APX 5.0M-B3 Master module, which acts as the battery management system for safe operation. Note: the voltage class of the battery (LV/HV) must match the inverter — we will confirm the pairing before you order. You will find the full range of inverters in the shop.
Sizing the energy storage capacity
Modular expansion: one Master module (APX 5.0M-B3) plus up to five expansion modules (APX 5.0P-B3) of 5 kWh each = a 5-30 kWh system. Capacity is matched to the daily energy consumption and the goal of the investment: to increase self-consumption, an energy storage battery covering the evening load is usually enough, while real backup power calls for more capacity and power. Write to info@growatt.tech — we will size the system for your installation and inverter.
Growatt APX 5.0M-B3 — savings and self-consumption
In many European markets, depending on your tariff, electricity exported to the grid is worth less than the electricity you later buy back. The Growatt APX 5.0M-B3 energy storage battery reverses that balance: surplus solar energy that would otherwise be exported at a low rate is stored on site and used in the evening and at night. Self-consumption goes up, electricity bills go down, and the payback period of the PV investment gets noticeably shorter. On top of that comes a value that is hard to put a price on — energy security: during a grid outage, the energy storage battery together with a hybrid inverter keeps the most important circuits running in a home or business. The higher the energy prices and the bigger the daily consumption, the faster the energy storage battery pays for itself — which is why sizing should start from the real consumption profile, not just from the installed PV power.
Growatt APX 5.0M-B3 parameters in practice
LiFePO4 cells are thermally safe and resistant to degradation.
Safety — LiFePO4 cells
Growatt APX 5.0M-B3 is built on lithium iron phosphate (LiFePO4) cells. This is currently the safest chemistry in common use in residential energy storage: it is thermally resilient, contains no cobalt and is far less prone to thermal runaway than older NMC cells. The built-in battery management system continuously supervises individual cell voltages, temperature and the charge and discharge currents, disconnecting the energy storage battery in case of anomalies and balancing the cells for a longer service life. Combined with the long cycle life, this translates into years of maintenance-free operation of the energy storage system.
Installation and operation
Growatt APX 5.0M-B3 should be installed by a qualified installer according to the manufacturer’s manual. pay attention to the operating temperature range and ventilation. The energy storage battery is managed by the BMS and the inverter — once commissioned, its status (SOC, charging, discharging) can be checked remotely in the ShinePhone app. The product is covered by a European service warranty of 10 years, per the manufacturer’s terms.
Key technical data
| Growatt APX 5.0M-B3 — specification | |
|---|---|
| Type | LiFePO4 energy storage battery (HV) |
| Rated capacity | 5 kWh |
| Capacity (module) | 5 kWh |
| Cell chemistry | LiFePO4 |
| System voltage (HV) | 400 V (single-phase) / 750 V (three-phase) |
| Expansion | 1 Master module + 0-5 expansion modules = 5-30 kWh |
| Role in the system | Master module (integrated BMS) |
| Compatible inverters | three-phase Growatt MOD-HU hybrid inverters (APX Gen 2.0 systems) |
| Management / BMS | APX 5.0M-B3 Master module, which acts as the battery management system |
| Warranty | European service warranty (10 years per manufacturer) |
Full parameters are listed in the manufacturer’s datasheet.
What sets the series apart — Growatt APX 5.0M-B3
The APX 5.0M-B3 is the module that starts an APX Gen 2.0 energy storage system — it holds 5 kWh of capacity and manages the whole stack, which grows with 5.0P-B3 expansion modules up to 30 kWh.
What to check when selecting the Growatt APX 5.0M-B3
The most important thing when buying an energy storage battery is matching the voltage class of the battery to the inverter: this model is high-voltage (HV), so it works with three-phase Growatt MOD-HU hybrid inverters (APX Gen 2.0 systems). A battery of the wrong voltage class will not work. It is also worth planning the target capacity up front (modular expansion is easy, but sizing the system from the start is more convenient) and the installation spot with a suitable temperature range and ventilation. If in doubt, send us your inverter model at info@growatt.tech — we will confirm the pairing before you order.
Monitoring — Growatt APX 5.0M-B3
You monitor the Growatt APX 5.0M-B3 energy storage battery through the inverter it is connected to: the ShinePhone app and the ShineServer portal show the state of charge (SOC), the charge and discharge power and the operating history, with fault notifications. For installers managing multiple sites, Growatt provides service accounts with a view of the whole fleet from a single panel.
About the Growatt brand
Growatt is one of the world’s largest manufacturers of PV inverters and energy storage systems, present in the PV market for well over a decade, with an extensive service network in Europe. At Growatt.tech you will find Growatt equipment with full documentation and a European service warranty.
Why buy at Growatt.tech
- European service warranty (10 years per manufacturer).
- Help with matching the energy storage battery to your inverter and installation — voltage class and capacity sizing. Questions: info@growatt.tech.
- B2B trade prices — Log in to view trade prices.
Warranty and B2B support
Growatt APX 5.0M-B3 is covered by a European service warranty of 10 years, per the manufacturer’s terms. Log in to view trade prices. For a quote on a complete inverter + energy storage package, write to info@growatt.tech and our team will prepare an offer.
Frequently asked questions
Do I need anything else to start with the Growatt APX 5.0M-B3?
No. The Master module already contains the battery management system and forms a working 5 kWh battery on its own. You add APX 5.0P-B3 expansion modules only when you want more capacity.
Which inverters does the Growatt APX 5.0M-B3 work with?
It is a high-voltage (HV) energy storage battery, designed to work with three-phase Growatt MOD-HU hybrid inverters (APX Gen 2.0 systems). The battery’s voltage class must match the inverter.
What is the capacity and can I expand it?
This model offers 5 kWh of capacity. Modular expansion: one Master module (APX 5.0M-B3) plus up to five expansion modules (APX 5.0P-B3) of 5 kWh each = a 5-30 kWh system.
What cell chemistry and cycle life does the Growatt APX 5.0M-B3 offer?
LiFePO4 cells. A safe and durable cell technology.
Does the Growatt APX 5.0M-B3 provide backup power?
Yes — combined with a hybrid inverter, the energy storage battery keeps selected circuits running during a grid outage (the inverter’s backup/EPS function).
Where can I install the APX 5.0M-B3?
Installation should be carried out by a qualified installer according to the manual; pay attention to the operating temperature range and ventilation.
What warranty does the Growatt APX 5.0M-B3 carry?
The product is covered by a European service warranty of 10 years, per the manufacturer’s terms.
How do I monitor the state of charge of the APX 5.0M-B3?
Battery status (SOC), charging and discharging are all visible in the ShinePhone app and the ShineServer portal — through the inverter the energy storage battery is connected to.
What is the difference between a low-voltage (LV) and a high-voltage (HV) battery?
LV batteries (around 48-51 V) work with off-grid inverters and some hybrid inverters; HV batteries (hundreds of volts) work with three-phase hybrid inverters. The battery must match the inverter’s voltage class — otherwise the system will not work.
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