The specs say “rated input power 36W”, I would read that as 3A when running. Hopefully it doesn’t run 100% of the time, but if it does that’s 36Ah/day and maybe 20Ah of that is overnight while the solar
is not working.
The Fireflies should be 116Ah =232Ah total?
I would expect more than 8-10A from 320W of solar, but you know your installation
, so maybe shading cuts that down. Generally we use 4-5 hours of rated output for total solar production per day, so 8x4=32 (most pessimistic calculation) says the solar might almost keep up. Realistically unless you have a lot of shading I would expect more from the solar and you will likely be OK. If I were estimating a nice, clean installation
of 320W I would expect around 80-100Ah/day. Most of that should go to the Oasis, the start battery
shouldn’t take much.
Caveat being, what other loads do you have? The LEDs are fine for several hours, but how about music
, or TV, or charging
a computer? Those are likely larger and can eat into power budgets but get overlooked.