Solar panel/ladder/ water pressure.

[8022]

I have a 2019 Sunseeker 3010DSF, fiber glass roof w/double 12 Volt batteries and 100 watt solar panel on the roof. There is a two/one cable running from solar panel to interior with bracket on the roof.
Question
Is it worth the expense and perforating my shiny new roof to add panels and set of batteries in the series. i think the system capacity is 500 watt
I am also open to suggestions for a ladder to SAFELY ascend and descend from the roof. I think going up from the back would be best and I could use the factory ladder as a gripping point on and off. I have a Gorilla Ladder but it weighs 40 lbs.
I also wondered if anyone has added an auxiliary tank to stabilize shower flow.
Thanks, obviously new to the sport. My 1st critical driving lesson was not to get to close to a steel fence post and turn away from it.
2nd lesson - RV repair sites are never in a hurry after the sale. So after 2 mo. plus, they did do an excellent job with body repairs but mounted my blind spot detector horizontally scanning the sky or the roadside instead of vertical mounting facing the driver side blind spot.

[newRVer]

First question to ask is what do you want to use the solar panels for? If you just want to use it to keep the batteries (house/chassis) charged while not in use or in storage, then the 100 watt panel is sufficient. For me, I wanted to use solar to not only do that, but also to allow me to power much of the vehicle while at all day tailgates without using the generator and also to keep the batteries charged while I have it parked during our trips. I.e. We have stayed at some casino's for a few days while the RV stays parked in a lot.

I have a 3011 which has 2 x 6V 100Ahr AGM batteries and 2 x 100W flexible panels which seems to be a good combination for how I use the RV. However, if I lived out west and wanted to do a lot of boon docking, then I'd probably would want to add additional battery/solar capacity. The problem with these units is that they are very limited relative to the ability to add weight and space for batteries and panels. If we ever get to the point where I can and want to boon dock, then I'd probably invest in a different RV or trailer.

As far as using the rear ladder, I am a lightweight with no physical issues so using the rear ladder is not an issue. However, I would have a concern using the ladder if I weighed considerably more as I think the ladder might start to pull out of the rear wall.

PS. General rule of thumb is to use 100W of solar for every 100Ahr of battery. Also, with my flexible panels I did not have to penetrate the roof to secure them.