ac_coupling:start
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ac_coupling:start [2019-10-01 12:51] – guy_stewart | ac_coupling:start [2020-05-29 16:54] – [2.1 Rule definition] guy_stewart | ||
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* Systems with only a grid-tied PV inverter will fail when there is a grid black-out. A micro-grid system will continue to operate, and even keep using solar power. | * Systems with only a grid-tied PV inverter will fail when there is a grid black-out. A micro-grid system will continue to operate, and even keep using solar power. | ||
* It is also possible to run a AC-coupled micro-grid on a generator | * It is also possible to run a AC-coupled micro-grid on a generator | ||
- | * Most brands of PV inverters can be used for these systems, they need to be setup to support frequency shifting, often called the island-mode or micro-grid mode. For Fronius settings, see [[ac_coupling: | + | * Most brands of PV inverters can be used for these systems, they need to be setup to support frequency shifting, often called the island-mode or micro-grid mode. For SolarEdge settings, see [[venus-os: |
* If power will be fed back into the grid an anti-islanding device may have to be added to the system, depending on local regulations. | * If power will be fed back into the grid an anti-islanding device may have to be added to the system, depending on local regulations. | ||
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**The max PV power must be equal or less than the VA rating of the inverter/ | **The max PV power must be equal or less than the VA rating of the inverter/ | ||
==== 2.1 Rule definition ==== | ==== 2.1 Rule definition ==== | ||
- | In both grid-connected and off-grid systems with PV inverters installed on the output of a Multi, Inverter or Quattro, there is a maximum of PV power that can be installed. This limit is called the __factor 1.0 rule__: 3.000 VA Multi = 3.000 Wp installed solar power. So for a 8.000 VA Quattro the maximum is 8.000 Wp, for two paralleled 8000 VA Quattros the maximum is 16.000 Wp, etc. | + | In both grid-connected and off-grid systems with PV inverters installed on the output of a Multi, Inverter or Quattro, there is a maximum of PV power that can be installed. This limit is called the __factor 1.0 rule__: 3.000 VA Multi >= 3.000 Wp installed solar power. So for a 8.000 VA Quattro the maximum is 8.000 Wp, for two paralleled 8000 VA Quattros the maximum is 16.000 Wp, etc. |
==== 2.2 Example and background ==== | ==== 2.2 Example and background ==== |
ac_coupling/start.txt · Last modified: 2022-04-12 06:47 by bob