When I run the numbers using the 10% charge rate I end up at 552 watts. Adding two more panels just like I already have would give me 600 watts. My existing panels are in 2s2p configuration. Adding two more would be 2s3p? Three sets of two in serial, then all three sets paralleled together. I think. It seems like there are various pros/cons to keeping them portable.
Pros:
* Can tilt to sun and maximize watts, helping to offset the bad angle of the roof-mounted flat panels
* Don't have to mount more panels on the roof
Cons:
* all the usual issues w/ portable panels
* transportation - in the RV? (where?) or in the car? (between the mountain bikes?)
* How would I splice these in w/ the existing panels? All my existing mc4 connections are on the roof. A combiner in my battery compartment, I guess?