What solar panel specs are used for calculating voltage loss
Which solar panel specs are reasonably used for calculating line voltage loss?
Forum Discussion
I believe he is asking about cable losses but most voltage loss calculators assume 12V, 24V etc. We all know our panels do not put out 12V or 24V. They put out 17-18Vmp and 27-35 Vmp. So is your question, Should we be using Vmp when sizing our cable? I don't know. I think most just 12V and size for 3% or less loss from PV to controller and 1% or less from controller to battery.
The link mentioned above allows for specific voltage/amperage so in that case, I would tend to use Vmp and Imp from the PV array.
If I am close to the 3% margin I'll lean to going one size larger to account for possible connection losses.
The link mentioned above allows for specific voltage/amperage so in that case, I would tend to use Vmp and Imp from the PV array.
If I am close to the 3% margin I'll lean to going one size larger to account for possible connection losses.
