A system for the making of aluminum, comprising: an electrolysis cell configured to retain a molten electrolyte bath , the bath including alumina as at least one bath component, the electrolysis cell including: an anode ; a cathode in spaced relation from the anode ; a cell bottom , and a sidewall consisting essentially of the at least one bath component, wherein the sidewall has a thickness of 3 mm to not greater than 500 mm, and wherein a heat flux through the sidewall of the cell during cell operation is not greater than about 4 kW/ m 2 , and wherein the sidewall further comprises a first sidewall portion configured to fit onto a thermal insulation package of the sidewall and retain the electrolyte bath , and a second sidewall portion configured to extend up from the cell bottom , wherein the second sidewall portion is longitudinally spaced from the first sidewall portion; a deposit of feed material retained adjacent the sidewall , wherein the feed material includes the at least one bath component; and the at least one bath component is within 90% of saturation; wherein the bath component comprises a bath content saturation percentage measured at a location adjacent to the sidewall ; and wherein, via the deposit of feed material, the sidewall is stable in the molten electrolyte bath . an electrolysis cell configured to retain a molten electrolyte bath , the bath including alumina as at least one bath component, the electrolysis cell including: an anode ; a cathode in spaced relation from the anode ; a cell bottom , and a sidewall consisting essentially of the at least one bath component, wherein the sidewall has a thickness of 3 mm to not greater than 500 mm, and wherein a heat flux through the sidewall of the cell during cell operation is not greater than about 4 kW/ m 2 , and wherein the sidewall further comprises a first sidewall portion configured to fit onto a thermal insulation package of the sidewall and retain the electrolyte bath , and a second sidewall portion configured to extend up from the cell bottom , wherein the second sidewall portion is longitudinally spaced from the first sidewall portion; a deposit of feed material retained adjacent the sidewall , wherein the feed material includes the at least one bath component; and the at least one bath component is within 90% of saturation; wherein the bath component comprises a bath content saturation percentage measured at a location adjacent to the sidewall ; and an anode ; a cathode in spaced relation from the anode ; a cell bottom , and a sidewall consisting essentially of the at least one bath component, wherein the sidewall has a thickness of 3 mm to not greater than 500 mm, and wherein a heat flux through the sidewall of the cell during cell operation is not greater than about 4 kW/ m 2 , and wherein the sidewall further comprises a first sidewall portion configured to fit onto a thermal insulation package of the sidewall and retain the electrolyte bath , and a second sidewall portion configured to extend up from the cell bottom , wherein the second sidewall portion is longitudinally spaced from the first sidewall portion; a deposit of feed material retained adjacent the sidewall , wherein the feed material includes the at least one bath component; and the at least one bath component is within 90% of saturation; wherein the bath component comprises a bath content saturation percentage measured at a location adjacent to the sidewall ; and wherein, via the deposit of feed material, the sidewall is stable in the molten electrolyte bath . <EOS>