Growatt APX 55 kWh – one column is already full, the other one is almost
Growatt APX 55 kWh is a two-cluster configuration of the family Growatt APX HV Battery 2.0: two master modules APX 5.0M-B3 and nine battery modules APX 5.0P-B3In the division we propose, the first column is already filled to the maximum, i.e., to 30 kWh, and the second one is 25 kWh and will accept one more module.
Set composition 55 kWh
Configuration 55 kWh are two clusters working in parallel, eleven elements in total: two master modules APX 5.0M-B3 i nine battery modules APX 5.0P-B3Each cluster has its own master module with battery management and its own capacity of 5 kWh in this module.
- Cluster 1 - 30 kWh (APX 30.0M-S3): 1 × APX 5.0M-B3 + 5 × APX 5.0P-B3.
- Cluster 2 - 25 kWh (APX 25.0M-S3): 1 × APX 5.0M-B3 + 4 × APX 5.0P-B3.
We've chosen the division so that each column individually matches the configuration on the catalog card. The card doesn't dictate this, and the columns don't have to be of equal capacity—we confirm the configuration when ordering.
The base is included. The master module comes pre-assembled with the base, and the packing list includes the base and wall mount—no need to purchase a stand or a separate battery management box.
A three-phase smart meter is included in the set. This is a three-phase smart meter Growatt for energy measurement, index 00005 in our catalogue. It does not need to be purchased separately. See the meter card
Single-phase installation? This kit will replace your meter at no extra charge. It has a three-phase meter, and the series instruction manual (chapter 1.1) mentions cooperation APX 2.0 also with single-phase inverters MIN-XH i MIN-XH2If this kit is for a single-phase installation, we will replace the meter with a single-phase one at no extra charge—just specify this in the "Order Notes" field when placing your order. The replacement applies to this kit: the master module and battery module, purchased separately, do not include the meter.
The complete set of cables runs in the master module — the cascade cabling cannot be purchased separately; this is commercial information PVGroup.pl, not a record from a catalog card. A separate item remains connecting element (adapting piece), i.e., the mechanical connection of two columns: the master module accessories bag contains only M6 expansion bolts and M4 screws. This item is not in the catalog today PVGroup.pl — please contact us before ordering.
How many clusters can be connected? The instructions provide for a cascade of two or three systems APX M-S3, and the limit is set by the inverter: series MID-HU supports up to three clusters, series MID-XH – up to two. For the MOD series, the manual doesn't specify this, and we haven't verified it. This configuration runs on two clusters, so it falls within both documented limits.
Who is this capacity for?
- Industrial facilities with high daily consumption - 55. kWh covers a full work shift of many plants without drawing from the grid.
- Installations approaching the maximum of architecture — a buyer who consciously leaves room for one last battery module.
- Multifamily buildings and communities — capacity calculated for multiple premises, with full support of common areas.
Split 30 + 25 and last free slot
We divide the nine battery modules into five and four, which gives us a cluster APX 30.0M-S3 and cluster APX 25.0M-S3The first one is filled to capacity: one column will not accept more than five battery modules with one master module. The second one has one more free slot, which leads to 60 kWh in two clusters.
Key specifications
| Growatt APX 55 kWh — specification | |
|---|---|
| Number of modules | 2 × APX 5.0M-B3 +9× APX 5.0P-B3 |
| Set type | APX 30.0M-S3 + APX 25.0M-S3 |
| Cell chemistry | LFP |
| Nominal voltage | 400V (1-phase) / 750V (3-phase) |
| Battery voltage range | 350-550V (1-phase) / 660-980V (3-phase) |
| Max charge and discharge current | 28,6 A (1-phase) / 22,73 A (3-phase) |
| Management / BMS | APX 5.0M-B3 |
| Communication | CAN / RS485 |
| Level of security | IP66K |
| Assembly | floor |
| Working temperature range | −20 °C … 55 °C |
| Cooling | natural |
| Dimensions (W×H×D) | 590 × 1750 × 255 mm + 590 × 1485 × 255 mm |
| Weight | 511,4 kg |
| Development | 35–60 kWh |
| Compatible inverters | MIN-XH, MIN-XH2, MOD, MID |
| Warranty | 10 years |
The values are from the catalog card Growatt APX 5.0-30.0M-S3 (revision 2026-07) and from the series user manual; the cells are recorded on the data sheet as Cobalt Free Lithium Iron Phosphate. The data sheet does not provide maximum or peak power for a dual-cluster configuration, therefore these rows are not included in the table. The data sheet does not include depth of discharge, round-trip efficiency, or number of cycles.
Certificates and standards
Catalog card lists for the system APX 5.0-30.0M-S3 following standards and certificates: IEC62619(Cell&Pack) / IEC60730 / IEC62477-1 / IEC62040-1 / CE(EN61000) / UN38.3 / IEC60529 / REACH / CEC. We will send the certificate in the form of a document on request.
Installation and working conditions
Double-cluster operation is only permitted in floor mounting. With a 30 + 25 split kWh The columns are 1750 and 1485 mm high and weigh 278,2 and 233,2 kg respectively. The height of the first column – 1750 mm including the base – can be critical in rooms with low ceilings or with pipes running under the ceiling.
- Degree of protection IP66 and natural cooling, without fans.
- Operating temperature range from -20 to 55 °C — the card lists the heating foil as part of the system equipment.
- Relative humidity 5–95% and work up to 4000 m above sea level.
- Distance between columns 150 mm, and from the wall 25–40 mm - dimensions from the instruction manual for a two-column system.
Compatible inverters
The user manual indicates cooperation with single-phase inverters of the MIN-XH and MIN-XH2 series, and with three-phase inverters - with the MOD and MIDThese are the only families listed in the manufacturer's document and we only declare them.
The inverter is the second system limitation, next to battery capacity. The data sheet stipulates that the system's power is limited by the inverter's maximum charge and discharge power. Submit your inverter model and we'll confirm the kit before purchase. If the inverter isn't already in your project, start with the three-phase hybrid inverters category.
B2B warranty and support
The catalog card gives the series APX 2.0 ten-year warranty. Equipment purchased in PVGroup.pl is covered by a European service warranty, technical documentation for downloadInstallers and integrators can log in and see net prices with a wholesale discount. Lithium cells are subject to hazardous goods transport regulations.
Adjacent capacities of this series: Growatt APX 50 kWh and Growatt APX 60 kWh. Full range of magazines in the category Energy storage.
Most frequently asked questions
How many modules does the warehouse have? Growatt APX 55 kWh?
Eleven: two master modules APX 5.0M-B3 and nine battery modules APX 5.0P-B3The set also includes a three-phase smart meter. Growatt, in our catalogue index 00005 - no need to purchase it separately.
Do I need to purchase additional equipment for two-cluster operation?
No cables - the complete wiring is in the master module (commercial information PVGroup.pl). A separate item is the connecting element (adapting piece), which mechanically connects the two columns; the master module accessories bag only includes M6 expansion bolts and M4 screws. This item is not currently in the catalog. PVGroup.pl — please contact us before ordering.
Are any of the columns already full?
Yes. In our division, the first column has 30 kWh, which is the maximum for one master module. The second one has 25 kWh and will accept one more battery module.
Is it possible to add a third cluster?
The manual allows for a cascade of two or three systems. APX M-S3, depending on the inverter (details in the kit composition section). Our offer ends with two clusters; for a project with three, please contact us.
I have a single-phase installation - does this kit make sense?
Yes. The series user manual (chapter 1.1) mentions cooperation APX 5.0-30.0M-S3 with single-phase inverters MIN-XH i MIN-XH2This kit includes a three-phase meter. If your installation is single-phase, we'll replace it with a single-phase meter at no extra charge. Simply specify this in the "Order Notes" field when placing your order. This replacement is for the kit; the master module and battery module, which are purchased separately, do not include the meter.
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