Description
Growatt APX 20 kWh – energy storage set
Growatt APX 20 kWh is a ready-made high-voltage (HV) energy storage set (LiFePO4 batteries) with 20 kWh of capacity, made up of 4 modules of the APX 5.0P-B1 type, from the Growatt.tech range. This model is a high-voltage (HV) LiFePO4 energy storage battery with a modular architecture. It stores surplus solar energy and releases it in the evening and in backup mode, working with MOD-XH BP and MID-XH hybrid inverters. The BMS manages cell operation and safety. An energy storage battery is matched to an inverter of the same voltage class — in this case: three-phase Growatt MOD TL3-XH BP hybrid inverters.
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.
Expert commentary
“The Growatt APX 20 kWh 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 20 kWh energy storage battery works
Growatt APX 20 kWh is a high-voltage (HV) LiFePO4 energy storage battery with a modular architecture. It stores surplus solar energy and releases it in the evening and in backup mode, working with MOD-XH BP and MID-XH hybrid inverters. The BMS manages cell operation and safety.
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
- Cobalt Free Lithium Iron Phosphate (LFP) cells — safe and durable.
- Depth of discharge (DOD) 90% — capacity you can actually use
- Integrated BMS — voltage and temperature protection plus cell balancing
- Modular design — easy capacity expansion
- IP66 ingress protection
Compatible inverters and accessories
Growatt APX 20 kWh is a high-voltage (HV) energy storage battery, designed to work with: three-phase Growatt MOD TL3-XH BP hybrid inverters. Battery management relies on the APX 98034-P2 power module for safe operation. For mounting, the APX Battery Base is used. 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.
What the set includes
Growatt APX 20 kWh is a ready-made energy storage set with 20 kWh of capacity, made up of 4× APX 5.0P-B1 battery module (high-voltage (HV)) together with the accessories needed for commissioning: the APX 98034-P2 power module plus the APX Battery Base included in the package. The set is prepared to work with three-phase Growatt MOD TL3-XH BP hybrid inverters — the voltage class (HV) and capacity are already matched, so the installer mounts it without selecting components separately. If needed, the capacity can be expanded later with additional modules.
This set in numbers
| Modules in the set | 4 × APX 5.0P-B1 |
|---|---|
| Nominal capacity | 20 kWh (4 × 5 kWh) |
| Usable capacity | about 18 kWh at the datasheet depth of discharge of 90% |
| Total weight | about 200 kg (4 × 50 kg per module) |
| Stack footprint | 690 × 185 mm, height about 1180 mm when the 4 modules are stacked |
Figures for the complete set are calculated from the per-module values in the manufacturer’s datasheet.
Sizing the energy storage capacity
Modular expansion: 1-6 modules of 5 kWh each = a 5-30 kWh system; you scale the capacity to your demand. 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 20 kWh — 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 20 kWh 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 20 kWh parameters in practice
the high depth of discharge (DOD 90%) lets you use nearly the full capacity in practice. Cobalt Free Lithium Iron Phosphate (LFP) cells are thermally safe and resistant to degradation.
Construction: IP66 ingress protection, operation across a discharge temperature range of -10°C~50°C, a weight of 50 kg at 690/185/295 (W/D/H) – APX 5.0P-B1 battery module mm in size.
Safety — LiFePO4 cells
Growatt APX 20 kWh 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 20 kWh should be installed by a qualified installer according to the manufacturer’s manual. The IP66 ingress protection rating determines where it can be mounted; 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 20 kWh — specification | |
|---|---|
| Type | LiFePO4 energy storage set (HV) |
| Set capacity | 20 kWh |
| Number of modules | 4× APX 5.0P-B1 |
| Cell chemistry | Cobalt Free Lithium Iron Phosphate (LFP) |
| Nominal voltage | 385 V |
| Depth of discharge (DOD) | 90% |
| Ingress protection | IP66 |
| Charge temperature | -10°C~50°C |
| Discharge temperature | -10°C~50°C |
| Compatible inverters | three-phase Growatt MOD TL3-XH BP hybrid inverters |
| Management / BMS | APX 98034-P2 power module |
| Warranty | European service warranty (10 years per manufacturer) |
Full parameters are listed in the manufacturer’s datasheet.
What sets the series apart — Growatt APX 20 kWh
The APX series is a modular high-voltage energy storage battery for residential and commercial three-phase hybrid systems — compact 5 kWh modules stacked into a system of up to 30 kWh of capacity.
What to check when selecting the Growatt APX 20 kWh
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 TL3-XH BP hybrid inverters. 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 20 kWh
You monitor the Growatt APX 20 kWh 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 20 kWh 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
Which inverters does the Growatt APX 20 kWh work with?
It is a high-voltage (HV) energy storage battery, designed to work with three-phase Growatt MOD TL3-XH BP hybrid inverters. The battery’s voltage class must match the inverter.
What is the capacity and can I expand it?
This model offers 20 kWh of capacity. Modular expansion: 1-6 modules of 5 kWh each = a 5-30 kWh system; you scale the capacity to your demand.
What cell chemistry and cycle life does the Growatt APX 20 kWh offer?
Cobalt Free Lithium Iron Phosphate (LFP) cells and a depth of discharge of 90%. A safe and durable cell technology.
Does the Growatt APX 20 kWh 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 20 kWh?
The ingress protection rating is IP66. 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 20 kWh 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 20 kWh?
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.
B2B trade prices are visible after logging in. Log in to view trade prices.
Seba.Kato.PV –
Pretty sad there are no longer BMS P1 in production. They were a banger for smaller installations MOD XH.
The advantage is that they work in paralel.