I recently purchased the new EG4 Inverter. I talked to Signature Solar and reviewed my array. I have 12 445w panels and want to have the in 4S3P. While I could have 2-6s strings I will be challenged by some shading so I felt best to have 3 strings. Anyway, they told me I cannot exceed 18 amps. Doesn't make much sense. If so, I need to select another inverter. Below are the specs. Can someone please help with the difference between "maximum input current draw" and 'maximum charge current (PV)? Thank you all!