В крайна сметка посъветвах се и с ChatGPT. Дадох му данните за инвертора и панелите, ето какво ми отговори:
With these specifications in mind, let's reassess the configuration options:
Old Panels by LONGI (4 panels):- Rated Maximum Power (Pmax): 370W
- Voltage at Pmax (Vmp): 34.4V
- Current at Pmax (Imp): 10.76A
New Panels by DHM (4 panels):- Rated Maximum Power (Pmax): 445W
- Voltage at Pmax (Vmp): 41.96V
- Current at Pmax (Imp): 10.61A
Given these updated specifications, let's consider the configuration options:
Option 1: Series-Parallel Configuration with Two StringsIn this configuration, you create two strings of solar panels, each with 4 panels. In each string, you connect the panels in series and then connect the two strings in parallel. This configuration balances the voltage and takes advantage of the inverter's MPP range:
- String 1 (LONGI): 4 panels (4 x 34.4V/10.76A) in series = 137.6V/10.76A
- String 2 (DHM): 4 panels (4 x 41.96V/10.61A) in series = 167.84V/10.61A
- Total: 2 strings (137.6V/10.76A + 167.84V/10.61A) in parallel = 167.84V/21.37A
The total voltage of 167.84V falls within the inverter's MPP range (120Vdc to 430Vdc). The total current is 21.37A, which is within the inverter's maximum charger current of 100A. This configuration should work well with your inverter.
Option 2: Parallel Configuration with Voltage MatchingIn this configuration, you connect all 8 panels in parallel:
Total: 8 panels (4 x 34.4V/10.76A + 4 x 41.96V/10.61A) in parallel = 34.4V/43.04A + 41.96V/42.44A = 76.36V/85.48A
While the voltage (76.36V) falls within the inverter's MPP range, the current (85.48A) is higher than the inverter's maximum charger current of 100A. This configuration would likely overload the inverter's charging capacity.
Based on the updated panel specifications and your inverter's specifications, Option 1, the series-parallel configuration, remains the better choice as it falls within the specified voltage and current limits of the inverter while taking advantage of the different voltage characteristics of your panels.