ac_coupling:start

This shows you the differences between two versions of the page.

Both sides previous revision Previous revision | |||

ac_coupling:start [2020-05-29 16:54] guy_stewart [2.1 Rule definition] |
ac_coupling:start [2020-06-18 16:13] (current) marmour [2.4 Should you look at the total PV array, or the PV inverter rating?] |
||
---|---|---|---|

Line 51: | Line 51: | ||

==== 2.3 Charge current limit ==== | ==== 2.3 Charge current limit ==== | ||

- | Another question frequently asked is how can this factor be 1.0? Since the charger inside a 3000 VA Multi is not 3000 VA but closer to 2000 VA? The explanation lies in the fact that it will regulate . In other words: when there is too much power coming in, causing the charge current to exceed the limit, it will increase the output frequency again and will keep regulating the AC output frequency to charge with the limit. | + | Another question frequently asked is how can this factor be 1.0? Since the charger inside a 3000 VA Multi is not 3000 VA but closer to 2000 VA? The explanation lies in the fact that it will regulate. In other words: when there is too much power coming in, causing the charge current to exceed the limit, it will increase the output frequency again and will keep regulating the AC output frequency to charge with the limit. |

An example, a 3000 VA Multi, with 3000 W of solar power coming out of a PV inverter: | An example, a 3000 VA Multi, with 3000 W of solar power coming out of a PV inverter: | ||

Line 60: | Line 60: | ||

==== 2.4 Should you look at the total PV array, or the PV inverter rating? ==== | ==== 2.4 Should you look at the total PV array, or the PV inverter rating? ==== | ||

- | The mentioned 3000 Wp and 8000 Wp is the Watt-peak which can be expected from the solar system. So for a oversized PV array, where the total Watt-peak installed PV panels exceeds the power of the PV Inverter, you take the Wp from the inverter. For example 7000 Wp of solar panels installed, with an 6000 Watt PV grid inverter, the figure to be used in the calculations is 6000 Wp. | + | The mentioned 3000 Wp and 8000 Wp is the Watt-peak which can be expected from the solar system. So for an oversized PV array, where the total Watt-peak installed PV panels exceeds the power of the PV Inverter, you take the Wp from the inverter. For example 7000 Wp of solar panels installed, with an 6000 Watt PV grid inverter, the figure to be used in the calculations is 6000 Wp. |

And for an undersized PV array, where the total Wp of installed PV panels is less than the installed PV grid inverter, you use the Wp from the PV panels in your calculation. | And for an undersized PV array, where the total Wp of installed PV panels is less than the installed PV grid inverter, you use the Wp from the PV panels in your calculation. |

ac_coupling/start.txt · Last modified: 2020-06-18 16:13 by marmour