Victron energy MultiPlus-II 24/3000/70-32 GX Manuel page 6

Less maintenance and aging when the battery is not in use: the Storage mode
The Storage mode kicks in whenever the battery has not been subjected to discharge during 24 hours. In the Storage
mode float voltage is reduced to 2,2V/cell (13,2V for 12V battery) to minimise gassing and corrosion of the positive
plates. Once a week the voltage is raised back to the absorption level to 'equalize' the battery. This feature prevents
stratification of the electrolyte and sulphation, a major cause of early battery failure.
Battery voltage sense: the correct charge voltage
Voltage loss due to cable resistance can be compensated by using the voltage sense facility to measure voltage directly
on the DC bus or on the battery terminals.
Battery voltage and temperature compensation
The temperature sensor (supplied with the product) serves to reduce charging voltage when battery temperature rises.
This is particularly important for maintenance-free batteries, which could otherwise dry out by overcharging.
5.3.2 Li-ion batteries
Victron LiFePO4 Smart batteries
Use the VE.Bus BMS
5.3.3 Other Li-ion batteries
Please see https://www.victronenergy.com/live/battery_compatibility:start
5.3.4 More on batteries and battery charging
Our book 'Energy Unlimited' offers further information on batteries and battery charging, and is available free of charge
on our website: www.victronenergy.com/support-and-downloads/whitepapers
For more information on adaptive charging, please also refer to the General Technical Information on our website.
5.4 ESS – Energy Storage Systems: feeding energy back into the grid
When the product is used in a configuration in which it will feed back energy into the grid it is required to enable grid code
compliance by selecting the appropriate grid code country setting with the VEConfigure tool.
Once set, a password will be required to disable grid code compliance or change grid code related parameters. Contact
your Victron Distributor if you require this password.
Depending on the grid code there are several reactive Power control modes:
Fixed cos φ
•
Cos φ as function of P
•
Fixed Q
•
Q as function of input voltage
•
Reactive Power capability
If the local grid code is not supported by the product an external certified interface device should be used to connect the
product to the grid.
The product can also be used as a bidirectional inverter operating parallel to the grid, integrated into a customer
designed system (PLC or other) that takes care of the control-loop and grid measurement.
Special note regarding NRS-097 (South Africa):
The maximum allowed impedance of the network is 0.28Ω + j0.18Ω
•
The inverter is fulfilling the unbalance requirement in case of multiple single phase units only when the Color
•
Control GX is part of the installation.
Special note regarding AS 4777.2 (Australia/New Zealand):
• Certification and CEC approval for off-grid use does NOT imply approval for grid-interactive installations.
Additional certification to IEC 62109.2 and AS 4777.2.2015 are required before grid-interactive systems can be
implemented. Please check the Clean Energy Council website for current approvals.
• DRM – Demand Response Mode When the AS4777.2 grid code has been selected in VEConfigure, DRM 0
functionality is available on port AUX1 (see appendix A. To enable grid connection, a resistance of between
5kOhm and 16kOhm must be present between the terminals of port AUX1 (marked + and - ). The product will
disconnect from the grid in case of an open circuit or a short circuit between the terminals of port AUX1. The
4