====== Victron & AXIstorage Li 7S / 9S =====

The combination of Victron products with the BMZ ESS 7.0 battery has been tested and certified by the R&D departments. The combination is actively supported by both companies.
The AXIstorage 7S/ 9S is identical with the BMZ ESS hardware and software and therefore also compatible.

{{ :battery_compatibility:axistorage.png?nolink&200 |}}
==== 1. Introduction ====
=== 1.1 Compatible Victron products ===
All 48V Multis and Quattros. A [[venus-os:start|GX device]] is necessary in the system, since that has the canbus port which is used for the (required!) communication between the ESS battery and the Victron system.

=== 1.2 Notes ===
  * AXIstorage batteries can only be used in a [[https://www.victronenergy.com/live/assistants:ess-assistant|Victron ESS installation]] installation that uses the ESS Assistant.
  * Paralleling multiple AXIstorage ESS batteries to expand capacity is possible. Contact AXIstorage for more information.
  * Derating, based on the dynamic AXIstorage ESS charge- and discharge limits:
    * Minimum CCGX version is v1.72    
    * The derating mechanism is not very precise yet. In other words, do not expect a discharge limit of 30A to result in a precise discharge of 30A.
    * Actual charge- and discharge limits are visible in the Parameters page. See screenshot below in Chapter 5.
  * AXIstorage batteries and MPPT Solar Chargers with a VE.Can communication port cannot be both connected to the CCGX, because of different canbus speeds. Use Solar Chargers with a VE.Direct comm. port instead.

=== 1.3 System diagram ===
{{ :battery_compatibility:ess-1phase-axistorage.png?nolink |}}

==== 2. GX device needed ====
To use the AXIstorage ESS in Victron system, it is necessary to use a ColorControlGX or a VenusGX. The controller takes care of sending the necessary canbus keep-a-live message to the ESS battery. Without it, the battery will open its internal emergency relay after 10 minutes.

==== 3. Wiring of communication cables ====
Use the //VE.Can to CAN-bus BMS type B Cable//, part number ASS030720018. Plug the side which is labeled Battery BMS into the AXIstorage BMS. Plug the side labeled Victron VE.Can into the [[venus-os:start|GX device]].

Then, plug a [[https://www.victronenergy.com/accessories/ve-can-rj45-terminator|VE.Can terminator]] in the other VE.Can socket on the [[venus-os:start|GX device]]. Two VE.Can terminators are included with the package of the CCGX as an accessory, only one is used. Keep the other one as a spare.

More information about the cable can be found in [[battery_compatibility:can-bus_bms-cable|its manual]].

Without properly connecting this cable, the battery will stop charging/discharging after several minutes. Also, the battery will not show up on the display of the of the [[venus-os:start|GX device]].


==== 4. VEConfigure settings ====

=== 4.1 General tab ===
  - Check "Enable battery monitor"
  - Set the battery capacity to 121.5 Ah
  - The other parameters ("State of charge when bulk finished" and "Charge efficiency") can be left to their default setting. They are not used in this setup.

=== 4.2 Charger tab ===
^ Parameter              ^ Setting ^
| Battery type           | Lithium |
| Charge curve           | Fixed   | 
| Absorption voltage     | 60.75 V |
| Float voltage          | 60.00 V | 
| Absorption time        | 1 Hr    |

Note: make sure to double check the float voltage after completing Assistants, and if necessary set it back to 60.00 V.

=== 4.3 ESS Assistant ===
Select the fourth battery type:

{{ :battery_compatibility:ess-battery-system-selection.png?nolink |}}

Then:
  - Sustain voltage: 50.0V
  - Do not change the dynamic cut-off values, they have already been set correctly after selecting the lithium battery type.
  - Same for the restart offset: do not change that.


==== 5. GX device Configuration ====

  * Select the //CAN-bus BMS (500 kbits/s)// CAN-profile in the [[venus-os:start|GX device]]. Menu path: //Settings -> Services -> CAN-profile//. Note that this changes the function of a VE.Can port: it is not possible to connect both VE.Can products and a AXIstorage battery together.

  * After properly wiring and setting up, the AXIstorage will be visible as a battery in the device list:{{ :battery_compatibility:generic_battery_menu.png?nolink&290 | }}
  * The parameters option within the battery page shows the actual battery charge and discharge limits:{{ :battery_compatibility:batteryparameters.png?nolink&290 | }}
 

===== DISQUS =====
~~DISQUS~~