34000 mAh is 34 Amp hours, not 34 Amps.

34 A * 12 V with inefficiencies is more like 350 W, not 450 W.

Where you have Watts * hours above, your resultant unit should be Wh.

I’d suggest both another panel and also a deep cycle battery (Lithium if you can afford the upfront cost — they have a far longer cycle life than AGM and other lead-acid battery types) for charging everything.