Specifications and models of photovoltaic energy storage cabinets

What is the sunspec Alliance interoperability specification?

This SunSpec Alliance Interoperability Specification describes the data models and MODBUS register mappings for storage devices used in stand-alone energy storage systems (ESS). The models in this specification may also be applied to photovoltaic systems with storage subsystems. This specification is not specific to a single storage technology.

What's new in sunspec energy storage models?

The first publicly available draft of the SunSpec Energy Storage Models specification was published in the fall of 2014 and labeled “Draft 3”. Draft 4 builds on this work and adds additional models to support flow batteries. This draft also corrects a number of issues in the earlier draft, and it incorporates other feedback from workgroup members.

What is a sunspec battery base model?

All SunSpec battery devices must implement the Battery Base Model (S 802). They may optionally implement one or more additional models specific to a battery storage technology (e.g. flow batteries). C_SunSpec_ID – A well-known value – 8xx that uniquely identifies this model as an energy storage model.

Is the energy storage specification a draft?

Even though this specification is marked as a “Draft,” the Energy Storage Workgroup believes that the information provided here may be use to implement communication interfaces in production systems. The storage models in this specification have been designed to be in alignment with IEC 61850-7-420 wherever possible.

Which storage models use sunspec's repeating block feature?

Models S 803, S 804, S 805 and S 807 all make use of SunSpec’s repeating block feature. For more information on repeating blocks, please see the SunSpec Information Models document. The Model Length register in each of these storage models should be used to determine how many repeating elements exist in the Modbus register map.

How many AC outdoor cabinets can be connected at the same time?

Max. PV input voltage Max. PV input current Max. THD of current *: This transformer can be optional for non-off-grid use scenarios. **: Choose whether to connect to the N line according to the site situation. ***: Each AC outdoor cabinet can support up to two ba ery outdoor cabinets connected at the same time. The product can be expanded to Max.