If you're looking for 48V then "Trophy Battery" is another option. They have 48V server rack batteries between 100Ah and 220Ah. Priced the same or below the EG4 batteries. Comes with battery warmers inside the case that turn on if the BMS detects a charge current while the temp sensors indicate below freezing. It will block the charge current to power the heaters until a safe temperature is reached then turn off the heaters and allow for charging. Also reviewed by Will Prowse, with a favorable review.
I have not made my purchase yet as I am still far from that stage in my build, but I plan on purchasing the 48V 220Ah battery. At a hefty 226lbs I feel like the 11,264Wh will be enough for my build and then some.
2008 IC RE 40ft w/ Maxxforce DT and Allison 3000 PTS for fulltime living w/ a family of four.