ac_coupling:start
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| ac_coupling:start [2020-05-29 16:54] – [2.1 Rule definition] guy_stewart | ac_coupling:start [2020-09-03 10:56] – removed accubank? guy_stewart | ||
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| ==== 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: | ||
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| ==== 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. | ||
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| ==== 3.1 Lead batteries ==== | ==== 3.1 Lead batteries ==== | ||
| 1 kWp installed PV power requires approximately 5kWh of battery: | 1 kWp installed PV power requires approximately 5kWh of battery: | ||
| - | * 100 Ah accubank | + | * 100 Ah at 48 Vdc |
| - | * 200 Ah accubank | + | * 200 Ah at 24 Vdc |
| - | * 400 Ah accubank | + | * 400 Ah at 12 Vdc |
| ==== 3.2 Lithium batteries ==== | ==== 3.2 Lithium batteries ==== | ||
| 1,5 kWp installed PV power requires: | 1,5 kWp installed PV power requires: | ||
| - | * 100 Ah accubank | + | * 100 Ah at 48 Vdc |
| - | * 200 Ah accubank | + | * 200 Ah at 24 Vdc |
| - | * 400 Ah accubank | + | * 400 Ah at 12 Vdc |
| ===== 4 Requirement of adding DC-Coupling - MPPT Solar Chargers ===== | ===== 4 Requirement of adding DC-Coupling - MPPT Solar Chargers ===== | ||
ac_coupling/start.txt · Last modified: 2022-04-12 06:47 by bob