Here is a simple calculator for your solar panels, put in the Voc (open circuit voltage) and how many watts and it will calculate amps for each solar panel.
The result will show you how much Volt in series or Amps in parallel setup
| Voc (V) | Watts | Amps |
|---|---|---|
In series you add the Voltage together and in parallel you add the Amps
So a 100W panel with 27Voc will give about 3,7 A and two in series will be 54V and 3,7 A (27V + 27V)
If you are connecting two or more panels of different wattage then the amp will be a bit tricky to calculate, so in series its preferable to have the same specs
In a parellel setup it will be 27V and 7,41 A, (3,7A + 3,7A)
This is just a guidance for you when you are about to buy a solar regulator or add another solar panel
When you are connecting in series measure the voltage with a multimeter to make sure the voltage is below max on your solar regulator.
When linking two or more solar panels together, the voltage can rise to levels that are not only uncomfortable but potentially hazardous, so be careful!
This regulator from Victron has Max 250 Volt and Max 70 Amps
That is about 5st 400W Renogy portable solar panels
Max Power at STC: 400W
Open Circuit Voltage: 47.2V
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