A lot of this depends on your power needs. An energy audit is a good thing to do, and then you know how much you need to replenish into your battery based on typical daily draw, and also what capacity deep cycle battery you even need in the first place. I replaced all the bulbs on my 192 with LEDs, and moved to a U1 tractor battery. (I thought that the U1 would be so much easier to bring home for charging. But THEN I went and got the solar panel because I can't leave well enough alone....) I occasionally would charge a device from the battery, say if a Bluetooth speaker starts running out, or iPhone needs a boost. With such minimal usage on primarily the weekends, I figured a Battery Tender 5 watt panel with built-in charge controller (which is probably a basic pulse width modulation charger probably only good for preventing overcharging of the sealed lead acid battery) was good enough. If I did use a lot of power over a weekend (unlikely) it would have plenty of time to charge during the week. The panel is just the right size to sit on the lazarette cover, and I just tie it in place with cords running under the seat. Original poster seems like quite a bit of solar capacity, but I suppose for someone spending a week out on the boat that would be necessary. Keep in mind that lead acid batteries, either sealed or Absorbed Glass Matt (AGM) like to be kept fully charged, and the quickest way to kill them is to leave them sit partially discharged. I personally would stay away from Gel unless I had shore power and a charger specifically designed for Gel.