MultiPlus-II 24/3000/70-50 2x120V Manual
Table Of Contents
- MultiPlus-II 12V 3kVA 2x120V
- Table of Contents
- 1. IMPORTANT SAFETY INSTRUCTIONS - Save these instructions!
- 2. Description
- 3. Operation
- 4. Installation
- 4.1. Location
- 4.2. Connection of battery cables
- 4.3. Connection of the AC cabling
- 4.4. Optional Connections
- 4.4.1. Remote Control
- 4.4.2. Programmable relay
- 4.4.3. Programmable analog/digital input/output ports
- 4.4.4. Starter battery (connection terminal E, see appendix A)
- 4.4.5. Voltage sense (connection terminal J, see appendix A)
- 4.4.6. Temperature sensor (connection terminal J, see appendix A)
- 4.4.7. Parallel Connection
- 4.4.8. Three-phase operation
- 5. Configuration
- 6. Maintenance
- 7. Error Indications
- 8. Technical Specifications
- Appendix A. APPENDIX A: Connection overview
- Appendix B. APPENDIX B: Block diagram
- Appendix C. APPENDIX C: Parallel connection
- Appendix D. APPENDIX D: Three phase connection
- Appendix E. APPENDIX E: Charge algorithm
- Appendix F. APPENDIX F: Temperature compensation
- Appendix G. APPENDIX G: Dimensions
- Appendix H. APPENDIX H: Power flow diagrams
The microprocessor-driven adaptive battery management system can be adjusted for various types of batteries. The adaptive
function automatically adapts the charging process to battery use.
The right amount of charge: variable absorption time
In the event of slight battery discharge, absorption is kept short to prevent overcharging and excessive gas formation. After deep
discharging, the absorption time is automatically extended in order to fully charge the battery.
Preventing damage due to excessive gassing: the BatterySafe mode
If, in order to quickly charge a battery, a high charge current in combination with a high absorption voltage has been chosen,
damage due to excessive gassing will be prevented by automatically limiting the rate of voltage increase once the gassing voltage
has been reached.
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.
Two DC outputs for charging two batteries
The main DC terminal can supply the full output current. The second output, intended for charging a starter battery, is limited to
4A and has a slightly lower output voltage (12V and 24V models only).
2.3.2. Li-ion batteries
Victron LiFePO4 Smart batteries
Use the VE.Bus BMS
2.3.3. Other Li-ion batteries
Please see https://www.victronenergy.com/live/battery_compatibility:start
2.3.4. 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 (see www.victronenergy.com → Support & Downloads → Technical Information). For more information on adaptive
charging, please also refer to the Technical Information on our website.
MultiPlus-II 12V 3kVA 2x120V
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