Battery for Growatt SPH TL3 BH-UP - selection ARK 2.5H-A2 (7,68-25,6 kWh) and required BMS

Battery for Growatt SPH TL3 BH-UP is defined by the manufacturer unambiguously: the entire series of inverters from 4 to 10 kW works with high-voltage modules ARK 2.5H-A2 and requires a controller HVC 60050-C2The selection isn't about choosing a battery model, but about choosing the number of modules in the tower—and this is where most miscalculations occur. This article guides you through the complete selection process: an inverter power matrix for a minimum tower, a table of all configurations with voltages and grounds, a list of prohibited connections, and assembly limits from the manual.

What battery fits the inverter Growatt SPH TL3 BH-UP?

The only compatible battery for Growatt SPH TL3 BH-UP is a system ARK HV: modules ARK 2.5H-A2 assembled into a tower and controller HVC 60050-C2, which communicates with the inverter via CAN bus. The inverter accepts storage in the voltage window from 100 to 550 V, and the entire series is compatible with the system ARK confirmed by the distributor's compatibility table.

Element	Value
Battery class	high voltage (HV)
Module	ARK 2.5H-A2 — 2,56 kWh, 51,2V, 27kg
Cells	LiFePO4 without cobalt, 1P16S system with 50 Ah cells
Controller (mandatory)	HVC 60050-C2 - 90-585V range, 25A current, CAN2.0
Inverter battery window	100 550-V
Durability/depth of discharge	over 6000 cycles, DoD 90%

How many modules ARK 2.5H-A2 for 4-10 kW inverter?

The inverter limits the continuous power to charge and discharge the battery - from 3000 W at SPH 4000TL3 BH-UP up to 7500 W at SPH 10000TL3 BH-UP. The tower, in turn, has its own nominal power, which increases with the number of modules. The comparison of both cards yields a selection rule: the tower should have a nominal power at least equal to the inverter's limit—any less will work, but will not deliver the power the inverter allows. The "minimum tower" column in the matrix is ​​our conclusion from this comparison.

Two nuances from this matrix. First, SPH The 7000TL3 BH-UP requires a jump to 5 modules: four provide 5,12 kW, which is less than the 5200 W limit. Secondly, 25 A is the common operating point for both devices: this is the maximum charging current of the inverter and the nominal current of the tower—the tower's reserve of up to 48 A remains unused in this setup. The manufacturer reserves the right to derating current and power depending on temperature and charge state.

When selecting a backup power supply, count on the "rated" energy, not the nominal one: for a 6-module tower it is 13,82 kWh instead of 15,36 kWhThe failover itself takes less than 10 ms.

Tower Configurations - Voltage, Energy, Dimensions, Weight

Battery for Growatt SPH comes in pre-built configurations: the June 2025 catalog card describes towers with 3 to 10 modules. The newer November 2025 manual allows for 2 to 10 modules and adds a configuration ARK 5.1H-A2 with a nominal power of 2,56 kW - we provide both versions directly, because they come from documents with different dates. The 2-module variant does not cover the charging limit of even the smallest inverter of the series (3000 W), so in practice the selection for SPH The TL3 BH-UP remains a curiosity.

Editorial note to sources: the instruction table gives a weight of "45 kg" for a 5-module tower - in light of the adjacent values ​​(91, 118, 172 kg) and the catalog card (145 kg) this is an obvious printing error; we assume 145 kg.

What not to combine with Growatt SPH TL3 BH-UP?

List of connections for which the correct battery selection is required Growatt SPH does not allow - any item with a source address:

• Low voltage batteries. ARK 2.5L, HOPE LV nor AXE LVs are not compatible with this inverter - the compatibility table only indicates ARK 2.5H-A2.
• Tower without controller. HVC The 60050-C2 and modules are a mandatory set - the manufacturer clearly states that the system requires the purchase of both elements; without the controller, there is no CAN communication with the inverter.
• More than 4 units on a wall. Wall mounting limit is 4 units including controller; above that, two rows with a minimum spacing of 300mm and the wall must be able to support over 150kg.
• Undersized DC disconnector. The disconnect switch is built into the controller; if the design requires an additional one between the battery and the inverter, it must be rated at 750/1000 V DC and 63 A.
• Wires connected to the wrong terminals. The wires are connected to terminals of the same color - a mistake may cause a short circuit.
• Lead-acid battery kit. The inverter card formally lists the lithium/lead-acid type, but the supported storage kit in our offer is built exclusively on ARK.

Controller HVC 60050-C2 - Wiring and Accessories

The controller measures 650/260/185 mm, weighs 8,5 kg, has an IP65 rating, and operates in the 90 to 585 V range. The communication chain runs from the controller's BMU port through the Link0/Link1 ports of the subsequent modules, and the plug supplied with the controller is plugged into the Link1 port of the last module. The controller and modules are grounded using a 6 mm² wire.

Three purchase items often overlooked in quotes: a cable connecting the system to the inverter (purchased separately from the manufacturer), a floor stand and wall mount—both optional—and an extended series cable for dual-row installations. You can find the controller with cable here: BMS HVC 60050-C2 to SPH TL3 BH-UP.

Tower assembly: wall or floor?

A maximum of 4 units, including the controller, can be hung on the wall, using brackets with a minimum distance of 300 mm from the wall to the bracket and 500 mm from the ground. Larger towers are placed on the floor: up to 10 modules, and above 6, the manufacturer recommends a double-row arrangement. A minimum distance of 300 mm is maintained around the system, and 500-600 mm between two towers. Battery for Growatt SPH It operates in the range from -10 to +50°C, but below 0°C the manufacturer reserves the right to limit performance - in unheated rooms in winter, this must be taken into account in the expectations for the warehouse.

From the installer's practice

• Mixing voltage classes is the most common pricing error. From experience: offers can combine HV inverters with LV batteries because the series names sound similar. The compatibility table is absolute: battery for Growatt SPH must be HV class.
• The controller and PCS cable are lost in the quotes. A common mistake is to count only the modules - a missing controller or inverter cable only appears at the construction site and stops the start-up.
• The Link1 cap is a typical start-up surprise. Without it, the communication chain is incomplete; it lies in the controller box, not the module box.
• Mass dictates logistics. The largest tower is 280 kg at 2035 mm height; based on real installations, the planned lifting is 27 kg per module, not per tower.

Frequently asked questions about the battery ARK to SPH

Is the battery for Growatt SPH can it be expanded after some time?

The design is modular – the manual allows for a free selection of modules from 2 to 10, and the replacement and addition of components is described in a service procedure. However, the manual does not specify the conditions for combining modules from different production batches or with different mileage – before expanding an existing tower, confirm these conditions with our technical department.

Is the battery for Growatt SPH works in winter in an unheated room?

The operating range is -10 to +50°C, and storage at -20 to +25°C maintains its performance for 12 months. Below 0°C, the manufacturer reserves the right to limit performance—the storage unit will operate but will absorb energy more slowly.

What is the warranty on the battery and inverter?

Battery ARK The 2.5H-A2 has a 10-year warranty. Our verified table lists 10 years for the inverter, while the datasheet lists a 5/10-year variant. This discrepancy is due to the expansion options and is worth confirming when ordering. The manufacturer's European service warranty applies.

What certificates does the ARK system have?

The data sheet lists: IEC 62619, IEC 62040, IEC 62477, CE, RoHS, and UN 38.3; UN 38.3 applies to the transport of lithium cells and may be required by carriers. The controller is CE-EMC certified.

Selection checklist

1. Battery for Growatt SPH starts with the inverter model: read its continuous charging power limit (3000-7500 W).
2. From the selection matrix, select the minimum tower that covers the limit; increase capacity according to self-consumption and backup power needs, calculating the "rated" energy.
3. Add the controller HVC 60050-C2, inverter cable and – for floor or wall mounting – base or bracket, respectively.
4. Check mounting location: 4-unit limit on wall, 300mm spacing, weight and tower height from configuration table.
5. Verify the set in the tool inverter + battery configurator Growatt.

Complete kit - inverter and battery for Growatt SPH — you will find in our offer: inverter Growatt SPH 6000TL3 BH-UP and battery module ARK 2.5H-A2 — net prices for installers visible after logging in.

Sources

1. Growatt SPH 4000-10000TL3 BH-UP - Datasheet (EN) — catalog card SPH 4000-10000TL3 BH-UP, p. 2
2. Growatt ARK 2.5H-A2 Battery - Datasheet — catalog card ARK 2.5H-A2 (rev. 202506), pp. 1-2
3. Growatt ARK 2.5H-A2 - User Manual (EN) — instructions ARK 2.5H-A2 (rev. 202511) — pp. 1, 13, 16-18, 20-22, 27-32 of print