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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]
Line 71: Line 71:
  
 ==== 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 48 Vdc +  * 100 Ah at 48 Vdc 
-  * 200 Ah accubank 24 Vdc +  * 200 Ah at 24 Vdc 
-  * 400 Ah accubank 12 Vdc+  * 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 AC PV power requires 4.8 kWh of battery storage
-  * 100 Ah accubank 48 Vdc +  * 100 Ah at 48 Vdc 
-  * 200 Ah accubank 24 Vdc +  * 200 Ah at 24 Vdc 
-  * 400 Ah accubank 12 Vdc+  * 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 =====
  
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 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