ac_coupling:start
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ac_coupling:start [2020-06-18 16:13] marmour [2.4 Should you look at the total PV array, or the PV inverter rating?] |
ac_coupling:start [2021-01-19 11:10] guystewart [4 Requirement of adding DC-Coupling - MPPT Solar Chargers] |
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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 lead acid 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 |
| + | Each additional 1 kWp of AC PV will require an additional proportional 5 kWh increase in lead acid battery storage. | ||
| ==== 3.2 Lithium batteries ==== | ==== 3.2 Lithium batteries ==== | ||
| - | 1,5 kWp installed PV power requires: | + | 1,5 kWp installed |
| - | * 100 Ah accubank | + | * 100 Ah at 48 Vdc |
| - | * 200 Ah accubank | + | * 200 Ah at 24 Vdc |
| - | * 400 Ah accubank | + | * 400 Ah at 12 Vdc |
| + | Each additional 1.5 kWp of AC PV will require an additional proportional 4.8 kWh increase in battery storage. | ||
| ===== 4 Requirement of adding DC-Coupling - MPPT Solar Chargers ===== | ===== 4 Requirement of adding DC-Coupling - MPPT Solar Chargers ===== | ||
| Line 89: | Line 91: | ||
| Reason: recover from deadlock situation of AC-Coupling only situation. | Reason: recover from deadlock situation of AC-Coupling only situation. | ||
| + | |||
| + | There is no Factor 1.0 limit that applies for DC coupled PV through a Victron MPPT. Nor is there a specific minimum amount of battery storage capacity, though please follow battery manufacture specifications for maximum charge rates. A rule of thumb is C10 (10% of Ah capacity in A) for lead acid batteries, and C2 (50% of Ah capacity in A) for lithium batteries. | ||
| ===== 5 Software configuration ===== | ===== 5 Software configuration ===== | ||
ac_coupling/start.txt · Last modified: 2021-04-12 03:03 by guystewart
