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Solar PV inverter via BACnet gateway · BACnet points list
Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects BACnet points list
Updated 11 November 2026
The Chipkin CAS-2700-24 gateway reads SMA devices through a Sunny WebBox and serves them on BACnet IP. Each Sunny inverter gets 25 read-only Analog Inputs with SMA's own channel names: grid voltage, current and frequency, PV voltage and current, AC power, energy totals, operating hours, mode, error and temperature.
This page lists 25 BACnet objects for the Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects — 0 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Chipkin Automation Systems’s own free documentation, linked below.
- Manufacturer
- Chipkin Automation Systems
- Model
- CAS-2700-24 SMA Gateway - Sunny inverter objects
- Equipment
- Solar PV inverter via BACnet gateway
- Equipment type
- Other equipment
- BACnet objects
- 25 (0 writable)
- Transport
- BACnet IP
- Firmware
- Not stated
- Default device instance
- 389001
- Also known as
- SMA Sunny Boy BACnet, SMA inverter BACnet, Sunny WebBox BACnet gateway, CAS-2700-24, Chipkin SMA gateway
Reference only, provided as-is: verify against Chipkin Automation Systems’s current documentation and the live device before use. Not official Chipkin Automation Systems information. Terms of use.
BMS integration notes: Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects
Add the WebBox and each SMA device on the gateway's configuration page, then read the Analog Inputs; the gateway is monitoring only.
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| AI 13 | Mode | Operating mode | Read |
| AI 14 | Pac | AC output power (Pac) | Read |
| AI 5 | E-Total | Total energy yield (E-Total) | Read |
| AI 11 | Iac | AC current (Iac) | Read |
| AI 17 | Vac | Grid voltage (Vac) | Read |
| AI 4 | Error | Inverter error status | Read |
Heartbeat & communication loss
If the gateway loses a device or a value can't be read, the object's Out_Of_Service is set true and the last good value stays in Present_Value.
Network setup
- Gateway default BACnet device instance 389001, UDP port 47808; give each gateway a unique instance.
- Enter the Sunny WebBox IP address and pick the device type (Invertor, SensorBox or Sunny Island) for each device in the gateway's web page.
- Only one Sunny WebBox per gateway.
Watch out for
- Watch Out_Of_Service rather than the value to spot lost data.
- Names are SMA channel codes; see the SMA documentation for scaling and units.
Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AI | 1 | Backup State | Read | |||
| AI | 2 | Balancer | Read | |||
| AI | 3 | CO2 saved | Read | |||
| AImin | 4 | Error | Read | |||
| AImin | 5 | E-Total | Read | |||
| AI | 6 | Event-Cnt | Read | |||
| AI | 7 | Fac | Read | |||
| AI | 8 | Grid Type | Read | |||
| AI | 9 | h-On | Read | |||
| AI | 10 | h-Total | Read | |||
| AImin | 11 | Iac | Read | |||
| AI | 12 | Ipv | Read | |||
| AImin | 13 | Mode | Read | |||
| AImin | 14 | Pac | Read | |||
| AI | 15 | Power On | Read | |||
| AI | 16 | Temperature | Read | |||
| AImin | 17 | Vac | Read | |||
| AI | 18 | Vpv | Read | |||
| AI | 19 | Serial Number | Read | |||
| AI | 20 | VacL1 | Read | |||
| AI | 21 | VacL2 | Read | |||
| AI | 22 | Vpv-_PE | Read | |||
| AI | 23 | Max Temperature | Read | |||
| AI | 24 | Max Vpv | Read | |||
| AI | 25 | Vfan | Read |
No points match these filters.
Object ID lookup: Chipkin Automation Systems CAS-2700-24 SMA Sunny Inverter point IDs by name
Integration notes
- All objects are Analog Inputs; the manual gives names only, with no units or descriptions.
- Each further SMA device added to the gateway is offset by 100 (second device starts at AI 101, third at AI 201).
- The list is what the gateway exposes with its default configuration; the gateway polls the devices through one SMA Sunny WebBox.
- Access is inferred: Analog Inputs are read-only.
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the CAS-2700-24 SMA Gateway - Sunny inverter objects and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects
How many BACnet points does the Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects have?
This list has 25 BACnet objects: 25 analog inputs. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects BACnet points are writable?
None of the listed objects are marked writable in the source documentation. The source has no read/write column, so this is inferred from object type.
Where is the official Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects BACnet documentation?
The source is CAS-2700-24 SMA Gateway Manual (Modbus RTU and TCP / BACnet / HTML Gateway) (CAS-2700-24), revision Doc Rev 0, 12 Feb 2014, published free by Chipkin Automation Systems at https://cdn.chipkin.com/assets/uploads/2017/mar/09-14-31-59_CAS-2700-24%20-%20SMA%20to%20Modbus_RTU%20and%20TCP_%20BACnet%20and%20HTML%20Gateway%20Manual.pdf.
What are the minimum BACnet points to integrate the Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects?
Start with AI 13 Mode (Operating mode); AI 14 Pac (AC output power (Pac)); AI 5 E-Total (Total energy yield (E-Total)); AI 11 Iac (AC current (Iac)); AI 17 Vac (Grid voltage (Vac)); AI 4 Error (Inverter error status).
Does the Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects need a BACnet heartbeat or have a communication timeout?
If the gateway loses a device or a value can't be read, the object's Out_Of_Service is set true and the last good value stays in Present_Value.
How do I check these points on the real CAS-2700-24 SMA Gateway - Sunny inverter objects?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
More Chipkin Automation Systems BACnet points lists
- Solar irradiance and weather sensor via BACnet gateway
Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects
SMA Sunny SensorBox weather/irradiance stations connected to a Sunny WebBox polled by the Chipkin CAS-2700-24 gateway.
Also known as: SMA SensorBox BACnet, Sunny SensorBox BACnet, CAS-2700-24, Chipkin SMA gateway - Battery inverter (off-grid / backup) via BACnet gateway
Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny Island objects
SMA Sunny Island battery inverters (with slave units and Sunny Island Chargers) on a Sunny WebBox polled by the Chipkin CAS-2700-24 gateway.
Also known as: SMA Sunny Island BACnet, Sunny Island battery inverter BACnet, CAS-2700-24, Chipkin SMA gateway
Source: CAS-2700-24 SMA Gateway Manual (Modbus RTU and TCP / BACnet / HTML Gateway) · CAS-2700-24 · rev. Doc Rev 0, 12 Feb 2014. Object names, instances and units are reproduced as published; descriptions are our own.