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Overview of all battery systems Autarco can provide

This guide provides an overview of all residential and commercial & industrial (C&I) battery solutions offered by Autarco. It explains grid connection types, AC vs DC coupled systems, and system options to help you select the right battery configuration.

 

Residential battery storage solutions

Grid connection type

The first aspect to consider is the type of grid connection. For a single-phase connection, there is only one option: a single-phase hybrid inverter with a low-voltage (LV) battery. Autarco offers the MH-MII series with available power classes of 3.6 kW and 5 kW. The recommended battery type for this inverter is the Syntero LVR series, with capacities ranging from 5 kWh up to 25 kWh.

For three-phase connections, several options are available. A single-phase hybrid inverter can be connected to one of the phases while communicating with a three-phase smart meter, or you can choose a three-phase hybrid inverter with a high-voltage (HV) battery. Autarco provides three three-phase hybrid inverter series — LH-MII, LQH, and XLH — with power classes from 6 kW to 50 kW. The recommended battery type is the Syntero HVR series, with capacities from 7.6 kWh up to 23 kWh, and up to 230 kWh when using a parallel stack connection.

AC coupled vs DC coupled systems

DC coupled

In DC coupled systems, the PV array is connected to the hybrid inverter, which then charges the battery directly. Because PV power is generated as DC current, only a single DC/DC conversion is needed to charge the battery from PV. This ensures higher efficiency and minimal energy losses.

AC coupled

For existing systems with an on-grid inverter, a hybrid inverter can be added on the AC side to retrofit a battery. In this configuration, PV current is first converted to AC by the existing on-grid inverter, and then back to DC by the hybrid inverter. AC coupled systems typically experience an average of 5% energy loss when charging the battery from PV, do not allow DC/AC overdimensioning, and an EMS controller is recommended to coordinate the on-grid and hybrid inverters.

 

Commercial & industrial battery storage solutions

For C&I systems, the AC vs DC distinction also applies, but there are more possibilities and trade-offs depending on the chosen solution.

AC coupled

AC coupled solutions add a battery cabinet to an existing on-grid or hybrid inverter system. The cabinet can be installed on the AC side without changing the previous PV installation. This solution is cost-effective, but charging the battery from PV experiences roughly 5% energy losses due to the AC to DC conversion.

DC coupled (recommended)

DC coupled systems allow direct battery charging from PV, minimising energy losses and reducing the number of components. Two options are available:

Hybrid inverter + DC coupled cabinet

This solution provides full integration and flexibility. With the Autarco XLH inverter series and BF100 cabinet, up to two fully independent battery ports can be connected to a single inverter. Advantages include four MPPTs for maximum PV flexibility, no need for an additional EMS controller, and battery capacities from 7 kWh up to 430 kWh. The main disadvantage is the need to replace existing on-grid inverters and additional components requiring sufficient space.

AC coupled battery cabinet + MPPT modules

Autarco offers the DH200F and DH100F battery cabinets with optional MPPT modules. PV strings can be connected directly to the cabinet, enclosing all necessary components in a single device, increasing robustness. However, MPPT flexibility is limited, each MPPT has a single input, and complex rooftops may require additional optimizers or DC combiner boxes. Maximum MPPT modules for DH200F is three. Information availability in myAutarco is limited.