You need 88 amps for 20% of 440AH, but you can split the bank and do half at a time at 44 amps or so, which gives you a chance if you have a charger that can hold the 14.4ish voltage all the way till you are down to 0.5/100.
You can do that with one of these for a mere $125 approx. It will run on a 2000w inverter -gen. For the 100 amp version to do all 440Ah at once, you need a 3000w gen to run that big guy.
https://www.boatandrvaccessories.com/products/powermax-pm3-60lk-12-volts-60-amp-power-converter-battery-charger-w-led-light