ess:design-installation-manual
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ess:design-installation-manual [2019-10-07 10:02] – boekel | ess:design-installation-manual [2020-07-29 15:37] – [7.2 Three-phase ESS] marmour | ||
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====== ESS Design & installation manual ====== | ====== ESS Design & installation manual ====== | ||
+ | |||
+ | {{: | ||
===== 1. ESS Introduction & features ===== | ===== 1. ESS Introduction & features ===== | ||
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When an ESS system is able to produce more power than it can use and store, it can sell the surplus to the grid; and when it has insufficient energy or power, it automatically buys it from from the grid. | When an ESS system is able to produce more power than it can use and store, it can sell the surplus to the grid; and when it has insufficient energy or power, it automatically buys it from from the grid. | ||
- | In the ESS system, there must at least be one inverter/ | + | In the ESS system, there must at least be one inverter/ |
- | * [[https:// | + | * [[https:// |
* [[https:// | * [[https:// | ||
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Where there is no grid-meter; all loads are connected to AC-out. And where there is a PV Inverter present, that is also connected to AC out. | Where there is no grid-meter; all loads are connected to AC-out. And where there is a PV Inverter present, that is also connected to AC out. | ||
+ | |||
+ | {{: | ||
=== Optional feed-in of MPPT Solar charger power === | === Optional feed-in of MPPT Solar charger power === | ||
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For a full or partial grid-parallel installation an Energy Meter can be installed in the main distribution panel between the grid and the installation. | For a full or partial grid-parallel installation an Energy Meter can be installed in the main distribution panel between the grid and the installation. | ||
- | https://www.victronenergy.com/live/energy-meterdfs | + | A grid meter is not required where there are no AC renewable-energy source(s) and also no AC load(s) present on the the //input// side of the Multi/ |
- | A grid meter is only //required// when there is an additional energy source (e.g. PV) connected | + | If there is any AC renewable energy source |
+ | |||
+ | In particular, without a grid meter: | ||
+ | |||
+ | * When renewable energy | ||
+ | * The AC Load value shown will be too low (and will show zero where there is a surplus of renewable energy). | ||
+ | |||
+ | Both issues are resolved by installing a grid meter. | ||
+ | |||
+ | [[https:// | ||
=== PV (optional) === | === PV (optional) === | ||
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* //Slow charge//: ESS will slowly charge the battery when the SOC has been below the actual SOC limit for more than 24 hours. It will keep slow charging until the lower limit has been reached at which point the system once again switches to //Discharge disabled//. | * //Slow charge//: ESS will slowly charge the battery when the SOC has been below the actual SOC limit for more than 24 hours. It will keep slow charging until the lower limit has been reached at which point the system once again switches to //Discharge disabled//. | ||
* // | * // | ||
+ | * // | ||
=== 4.3.9 Limit charge power === | === 4.3.9 Limit charge power === | ||
- | This setting limits the amount of AC power used by the Multi for battery charging. The limit also applies to AC power received by the Multi from a grid-tie PV Inverter. | + | This setting limits the amount of AC power used by the Multi for battery charging. The limit also applies to AC power received by the Multi from any grid-tie PV Inverters connected to AC-in. |
- | In other words, this setting limits the flow of power from AC to DC. | + | In other words, this setting limits the flow of power from AC to DC on utilities connected to AC-in. |
* This setting does not reduce the charge power coming from //MPPT Solar Chargers//. | * This setting does not reduce the charge power coming from //MPPT Solar Chargers//. | ||
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* In the same menu, set Sunspec Model Type to int + SF | * In the same menu, set Sunspec Model Type to int + SF | ||
* In Settings-> | * In Settings-> | ||
+ | * In Settings-> | ||
+ | |||
+ | {{: | ||
Use the __Fronius Zero feed-in active__ menu item to double check that all above criteria are met. It will show **No** if the firmware requirement; | Use the __Fronius Zero feed-in active__ menu item to double check that all above criteria are met. It will show **No** if the firmware requirement; | ||
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(Make sure you install the ESS on L1. If it's installed on another phase the visualisation will be wrong.) | (Make sure you install the ESS on L1. If it's installed on another phase the visualisation will be wrong.) | ||
- | ==== 7.2 Three-phase ESS ==== | + | ==== 7.3 Three-phase ESS ==== |
A three-phase ESS system has at least one Multi installed on each phase. We recommend leaving the phase-compensation setting to its default: enabled. | A three-phase ESS system has at least one Multi installed on each phase. We recommend leaving the phase-compensation setting to its default: enabled. | ||
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With ESS in Optimize mode the system will always remain connected - even when the batteries are full. And although connected, the power draw is not substantial - this configuration offers the stability of the grid without additional grid consumption. | With ESS in Optimize mode the system will always remain connected - even when the batteries are full. And although connected, the power draw is not substantial - this configuration offers the stability of the grid without additional grid consumption. | ||
- | === Q4: Why is the VE.Bus state in //pass-through//? === | + | === Q4: Why is the VE.Bus state in pass-through? |
In ESS, the conditions for the VE.Bus system to be in // | In ESS, the conditions for the VE.Bus system to be in // | ||
- | | + | |
- | | + | |
- | | + | |
- | | + | |
+ | - A grid code is in use that requires the enabling of battery discharging by aux-inputs. Check the used grid-code in VEConfigure and compare with the electrical signals provided to the Inverter/ | ||
+ | - The Loss of Mains detection (LOM) causes issues, often in combination with a high impedance connectivity to the utility. For details see [[ve.bus: | ||
=== Q5: How can I suppress low battery warnings? === | === Q5: How can I suppress low battery warnings? === | ||
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Switching off in overload, while connected to the grid, is caused by the active Loss of Mains (LOM) detection, linked to the country code as configured in VEConfigure3. | Switching off in overload, while connected to the grid, is caused by the active Loss of Mains (LOM) detection, linked to the country code as configured in VEConfigure3. | ||
- | This behaviour occurs when the AC supplied on the AC-in of the Multi or Quattro is ' | + | This behaviour occurs when the AC supplied on the AC-in of the Multi or Quattro is ' |
For the solution and configuration options, see [[ve.bus: | For the solution and configuration options, see [[ve.bus: | ||
- | === Q9: Why does my MultiGrid refuse to feed-in? === | + | === Q9: Why are my loads powered by the grid instead of battery or solar? === |
- | A MultiGrid system can enter a state where feed-in (more precisely: converting DC to AC while connected to the grid) is disabled.\\ This happens when, at the moment of connection to the grid, there is not enough DC power to perform the required relay test. (N.B. this relay test is part of the grid code specification - and is mandatory). In order to perform this test the Multigrid must be able to run from battery during a period of time (depending on the selected grid code but usually about 1 minute).\\ If this is not possible, | + | Check list in case loads are being powered |
- | Therefore there is no need to worry - the system | + | __First of all__, check that the system |
- | === Q10: My battery is first discharging, | + | __Secondly__, |
+ | |||
+ | __Thirdly__, | ||
+ | |||
+ | The relay test will be performed once either the battery voltage has been recharged above 14/28/56 volt, or when the battery has been recharged to above 20% SOC. To check if a system is in this state, see the ESS Relay test entry in the Advanced submenu of the Multi/ | ||
+ | |||
+ | __Fourthly__, | ||
+ | |||
+ | __Lastly__, check that the rocker switch on the unit is set to On, rather than to Charger-Only. When set to charger-only, | ||
+ | |||
+ | __Finally__, | ||
+ | |||
+ | === Q10: Why does the system refuse to discharge my battery? === | ||
+ | |||
+ | See Q9. | ||
+ | |||
+ | === Q11: My battery is first discharging, | ||
The recharge you are seeing might be part of the Sustain protection. Consider increasing the minimum SOC level. For example increase it with 5%; and then check what happens. | The recharge you are seeing might be part of the Sustain protection. Consider increasing the minimum SOC level. For example increase it with 5%; and then check what happens. | ||
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Search this manual for Sustain to learn more. | Search this manual for Sustain to learn more. | ||
- | |||
- | === Q11: My Battery is not discharging === | ||
- | A similar wording for the same question is: my loads are being powered from the mains, rather than the battery. | ||
- | |||
- | See the [[# | ||
=== Q12: What is auto-recharge? | === Q12: What is auto-recharge? | ||
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The same applies to other solutions where the wiring is not protected against accidental removing, for example a simple cable with end-user removable plug, such as a portable power supply. | The same applies to other solutions where the wiring is not protected against accidental removing, for example a simple cable with end-user removable plug, such as a portable power supply. | ||
+ | ===== 10. Troubleshooting ===== | ||
+ | Trouble shooting steps: | ||
- | ===== Troubleshooting ===== | + | |
- | + | - Check battery type/brand. If lead then it might be unsuitable and probably broken because of the heavy cycling. | |
- | - Start with checking firmware versions (needs to be latest). And when asking questions; report the exact firmware versions that are used. | + | - If some unknown or unsupported CANbus battery; change the battery to a supported type. |
- | + | - Check the state of the inverter/ | |
- | - Check battery type/brand. If lead then it might be unsuitable and probably broken because of the heavy cycling. | + | |
- | + | ||
- | - If some unknown or unsupported CANbus battery; change the battery to a supported type. | + | |
Then; if PV is not used enough to power loads; | Then; if PV is not used enough to power loads; | ||
- | - Check for the # reason codes; see CODE KEY in this manual. | + | |
- | + | - Check wiring: lots of voltage drop between MPPT and multi will prevent the system from effectively powering AC loads from solar power. | |
- | - Check wiring: lots of voltage drop between MPPT and multi will prevent the system from effectively powering AC loads from solar power. | + | - Test with and without SVS enabled: leave it disabled. |
- | + | - Next, check MPPT charge current limit during the time that it is not used enough. MPPT CCL is supposed to be high always; even when battery full. Unless there is a temperature issue. | |
- | - Test with and without SVS enabled. | + | - Now check MPPT Charge Voltage Setpoint. It is supposed to be above actual battery voltage. |
- | + | ||
- | - Next, check MPPT charge current limit during the time that it is not used enough. MPPT CCL is supposed to be high always; even when battery full. Unless there is a temperature issue. | + | |
- | + | ||
- | - Now check MPPT Charge Voltage Setpoint. It is supposed to be above actual battery voltage. | + | |
- | + | ||
- | + | ||
- | Note that those last two setpoints are determined by software; and calculated based on the setpoints sent by the (CANbus connected) lithium battery: you can't change change them manually. Looking at them however does help understanding why certains things are happening; | + | |
+ | Note that those last two set points are determined by software; and calculated based on the setpoints sent by the (CANbus connected) lithium battery: you can't change them manually. Looking at them however does help understanding why certain things are happening; | ||
===== DISQUS ===== | ===== DISQUS ===== | ||
~~DISQUS~~ | ~~DISQUS~~ |
ess/design-installation-manual.txt · Last modified: 2021-01-14 08:35 by marmour