Adding more Solar and DC-DC charger

I like your plan. if you have the room increasing your solar to 800 watts will definatly get you better charging even in low light and on a normal day you will be charged alot faster. One thing to concider is the type of panels your using, if you can upgrade to 24V split cell panels would highly sugest that. to give you an example of the difference in my 5th wheel I have 480 watts of 12V panels with a PWM controler and ya in the summer I never have to worry about power, but once furnace season starts I have to be very carfull and some times plug in. in the fall before say 9am it puts out nothing. In my truck camper I have a single 325 watt 24V splitt cell panel and it puts out more amps than my 5th wheel, and starts producing power when it is barley sun up. last week at 7:30am it was already putting out 0.5 amp, not a lot but it was pretty much still dark and thats is an extra 1-2 AH back in the battery before the 5th wheel even starts putting out a charge. Myself I am putting another panel on the camper to take it to 650 and a larger battery and Ill be good to go. I am also looking at the DC to DC charger for while I drive or an emergency.

I do like the idea of the DC to DC charger, some one mentioned you could buy a lot of propane, but the ultimate goal for me would be not to have to have a generator and the DC to DC would only be a emergency charging source.

with a 280 AH LFP, I am assuming your built your own? if so the only other thing I would add to this plan is another one for more capacity. not right now but later down the road if you need it.

Steve