Illustrative equipment photography, not this model.
Growatt battery
Growatt’s own stackable module, and the pairing most likely to work with a Growatt inverter for the obvious reason. Even in house, the manual does not name a tested combination.
Published figures
Usable capacity
2.56 kWh
Capacity
50 Ah
Voltage window
44.0 to 57.6 V
Max charge current
50 A
Max discharge current
50 A
Comms
CAN, RS485
Form factor
Stackable modules
Units in parallel
6
Source status: Provisional figure Typical street price $800 to $1,200. Charge and discharge limits are per unit. Wiring packs in parallel raises both.
How many you need, by inverter
One pack accepts 50 amps. An inverter that can deliver more than that needs more than one, or the charge rate capped in settings. Both are valid, and the second one costs you charging speed on the short days when you need it most.
No document tracked here names a specific inverter for closed-loop operation with this pack. That does not mean it will not work. It means nobody has published the test.
Where the figures come from
Manufacturer documents: Growatt product downloads. Figures here should be read against the revision that covers your serial number, because manufacturers revise specifications without changing the model name.
Where to buy the Growatt ARK 2.5H
Listings for the Growatt ARK 2.5H plus the rack hardware and cabling a clean install needs.
Affiliate links. As an Amazon Associate this site earns from qualifying purchases, at no extra cost to you. Prices and stock change often, and a listing appearing here is not a statement that the pairing above is approved.
Questions people actually ask
How many Growatt ARK 2.5H packs do I need?
One pack accepts 50 amps and holds 2.56 kWh. Match the pack count to your inverter’s charge current first, then check the energy. A Sol-Ark 15K at 275 amps would take 6 of them to charge at full rate.
Does the Growatt ARK 2.5H do closed loop communication?
It publishes CAN, RS485. No document tracked here names a specific inverter, so any closed-loop claim needs confirming with both manufacturers before you rely on it.
How many can I wire in parallel?
The published limit is 6 units.
Which inverters pair cleanly with the Growatt ARK 2.5H?
None of the inverters tracked here clear all four checks with this pack. Most land on unverified because nobody has published the comms or surge figure, which is a gap rather than a fault.
