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assistants:self_consumption_hub-1_policy-5 [2015-11-02 14:37] – [How it works] mvaderassistants:self_consumption_hub-1_policy-5 [2019-01-22 10:16] (current) – external edit 127.0.0.1
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-====== Hub-1 - Policy 'Connected to mains, no feedback' ======+====== Deprecated: Hub-1 - Policy 'Connected to mains, no feedback' ======
  
-This policy is intended of backup systems, with DC-coupled solar installed. Use it to make use of excess solar power: as soon as the batteries are full, AC loads will be co-powered with solar power.+For new installes, this policy has been deprecated.
  
-To keep the text short, 'Multi' is used to describe the VE.Bus system. It can also be a Quattro, or multiple Multis or Quattros in a parallel-, split- or three-phase system. 'MPPT' is used to reference one or more [[http://www.victronenergy.com/solar-charge-controllers|BlueSolar MPPT charge controllers]] installed in the system.+Use [[ess:start|ESS]] instead. 
 + 
 +===== Original text ===== 
 + 
 +This policy is intended for backup systems, with DC-coupled solar installed. Use it to make use of excess solar power: as soon as the batteries are full, AC loads will be co-powered with solar power. Power stored in the batteries will only be used to power the loads during a grid failure. 
 + 
 +To keep the text short, 'Multi' is used to describe the VE.Bus system. It can also be a Quattro, or multiple Multis or Quattros in a parallel-, split- or three-phase system. 'MPPT' is used to reference one or more [[https://www.victronenergy.com/solar-charge-controllers|BlueSolar MPPT charge controllers]] installed in the system.
  
 ==== Installation & configuration ==== ==== Installation & configuration ====
-  * Safety: it is required to have either internal or external anti islanding detection. Internal detection is enabled if a compliant grid code standard is selected, see the Grid tab in [[http://www.victronenergy.com/support-and-downloads/software#ve-configuration-tools-for-ve-bus-products|VEConfigure3]]. +  * Safety: it is required to have either internal or external anti islanding detection. Internal detection is enabled if a compliant grid code standard is selected, see the Grid tab in [[https://www.victronenergy.com/support-and-downloads/software#ve-configuration-tools-for-ve-bus-products|VEConfigure3]]. 
-  * [[http://www.victronenergy.com/accessories/ve-can-to-ve-bus-interface|VE.Bus to VE.Can interface]] cable is supported but not required. When installed:+  * [[https://www.victronenergy.com/accessories/ve-can-to-ve-bus-interface|VE.Bus to VE.Can interface]] cable is supported but not required. When installed:
     * the Assistant will reduce output power of the MPPT in case of an Li-Ion high cell signal/balance.     * the Assistant will reduce output power of the MPPT in case of an Li-Ion high cell signal/balance.
     * the MPPT will not follow its own charge algorithm. The Assistant will actively control the output voltage of the MPPT instead.     * the MPPT will not follow its own charge algorithm. The Assistant will actively control the output voltage of the MPPT instead.
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     * for optimal use of solar power make sure that the absorption time of the MPPT is exceeds the absorption time of the Multi.     * for optimal use of solar power make sure that the absorption time of the MPPT is exceeds the absorption time of the Multi.
   * Lithium systems: (as always) connect the BMS to the MPPT solar chargers, to stop charging the batteries during a high cell condition.   * Lithium systems: (as always) connect the BMS to the MPPT solar chargers, to stop charging the batteries during a high cell condition.
-  * Install a [[http://www.victronenergy.com/panel-systems-remote-monitoring/bmv-700|BMV-700 Battery Monitor]] to get proper state of charge. The internal battery monitor of the Multi will not work correctly for dc-coupled systems. +  * Install a [[https://www.victronenergy.com/panel-systems-remote-monitoring/bmv-700|BMV-700 Battery Monitor]] to get proper state of charge. The internal battery monitor of the Multi will not work correctly for dc-coupled systems. 
-  * Install a [[http://www.victronenergy.com/panel-systems-remote-monitoring/color-control|Color Control GX]] to get full local and remote system monitoring.+  * Install a [[https://www.victronenergy.com/panel-systems-remote-monitoring/color-control|Color Control GX]] to get full local and remote system monitoring. 
 +  * The battery capacity, although displayed on the VEConfig settings summary screen in the assistant, is irrelevant when choosing this option. For this reason, the assistant will not ask for it.
 ==== How it works ==== ==== How it works ====
   * The system will always be connected to the grid, unless there is a power outage.   * The system will always be connected to the grid, unless there is a power outage.
   * During a power outage, the Multi will power the loads from the battery, until the Low DC voltage disconnect set-point has been reached. This set-point is configured on the Inverter tab in VEConfigure3.   * During a power outage, the Multi will power the loads from the battery, until the Low DC voltage disconnect set-point has been reached. This set-point is configured on the Inverter tab in VEConfigure3.
-  * After a power outage, grid and solar will be used to charge the batteries. By default, charging from solar power is not prioritized over charging from the grid, as the goal is to recharge the batteries as fast as possible and be ready for the next power outage. Reducing the amount of power that is used for charging from the grid is possible: reduce the maximum charge current in VEConfigure3 on the charger tab. For systems where flexibility is desired, see the Advanced section below.+  * After a power outage, grid and solar will be used to charge the batteries. By default, charging from solar power is not prioritized over charging from the grid, as the goal is to recharge the batteries as fast as possible and be ready for the next power outage. Permanently reducing the amount of power that is used for charging from the grid is possible: reduce the maximum charge current in VEConfigure3 on the charger tab. For systems where more flexibility is desired, see the Advanced section below. 
   * Once batteries are fully charged (Multi switches to float), excess solar will be used to power AC loads as soon as the total AC load exceeds 50 Watt. In this process the DC voltage will drop to 13V / 26V / 52V for lead batteries and 13.4V / 26.8V / 53.6V for Lithium batteries. These voltage are chosen such that the battery will not be discharged, while being low enough to take power from the MPPT charger and use it to power the AC loads.   * Once batteries are fully charged (Multi switches to float), excess solar will be used to power AC loads as soon as the total AC load exceeds 50 Watt. In this process the DC voltage will drop to 13V / 26V / 52V for lead batteries and 13.4V / 26.8V / 53.6V for Lithium batteries. These voltage are chosen such that the battery will not be discharged, while being low enough to take power from the MPPT charger and use it to power the AC loads.
   * Input current limiter (Power Assist):   * Input current limiter (Power Assist):
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   * Absorption phase is not skipped during charge, in contrast to the other polices in Hub-1. Because of this, and also because the grid will be used to charge the battery, there is no automatic maintenance charge needed. To do an equalization charge, trigger it manually by toggling the front switch on the Multi. Note that enabling (automatic) equalization on the MPPT might not always work: when there are AC loads, the Multi will take the extra power from the MPPT and use it to power AC loads, instead of letting the MPPT perform its equalization phase.   * Absorption phase is not skipped during charge, in contrast to the other polices in Hub-1. Because of this, and also because the grid will be used to charge the battery, there is no automatic maintenance charge needed. To do an equalization charge, trigger it manually by toggling the front switch on the Multi. Note that enabling (automatic) equalization on the MPPT might not always work: when there are AC loads, the Multi will take the extra power from the MPPT and use it to power AC loads, instead of letting the MPPT perform its equalization phase.
   * This policy can be used in single-, split and three phase configurations. The Hub-1 Assistant must be loaded in all phase masters or, in case of using a VE.Bus BMS, in all devices. The easy way is just to load it in all devices. If it is not needed in a device, you will  get a notification about that.   * This policy can be used in single-, split and three phase configurations. The Hub-1 Assistant must be loaded in all phase masters or, in case of using a VE.Bus BMS, in all devices. The easy way is just to load it in all devices. If it is not needed in a device, you will  get a notification about that.
 +  * Note that solar power will only be used to power the loads when the Multi is in float. The loads will be powered from the grid during the bulk and absorption phase.
  
 === Advanced: changing charge current from grid based on Battery SOC === === Advanced: changing charge current from grid based on Battery SOC ===
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 ===== DISQUS ===== ===== DISQUS =====
 ~~DISQUS~~ ~~DISQUS~~
 +
assistants/self_consumption_hub-1_policy-5.1446471443.txt.gz · Last modified: 2015-11-02 14:37 by mvader
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