SSA adsorptive and energetic performance metrics derived from the concentration profiles and the charge-discharge curves are summarized in Table . In addition to the metrics we used previously for the single cell modules, we introduce two new metrics, which are specific for the SSA bipolar stacks. These are the average resistance of an electrode pair in the stack 𝑅 𝑝𝑎𝑖𝑟 (Ω•cm 2 ), and the number of charges 𝑄 𝑐,𝑝𝑎𝑖𝑟 (C) per electrode pair. The specific capacitance calculated from the GCD curves for all investigated stacks are very similar, having values of 75, 77, 78 and 77 F•g -1 , and are consistent with the results derived from CV and EIS tests. In a bipolar electrode stack, the charging time should be independent from the number of cells in the stack. The measured charging time for all tested stacks was indeed nearly constant, and minimally fluctuated between 24 to 27 min. The coulombic efficiency for all stacks was very high, varying insignificantly from 95% to 99%. The high coulombic efficiency validates the uniformity of the electrode pairs assembled in the stacks. The charges stored in each electrode pair for the different stacks are also very similar (~50 C). The absolute, adsorbed amount of CO2 in the modules, and the productivity increased proportionally with the increasing number of electrode pairs (151 to 787 μmol, and 70 to 390 mmol•h -1 •m -2 ), respectively. The adsorption capacities of these stacks remained constant within experimental error margins (~58 mmol•kg -1 ), indicating that each electrode pair adsorbs about the same amount of CO2, regardless of the scale of the module. Likewise, the adsorption rates (~38 µmol•kg -1 •s -1 ) also remain about constant. The electron efficiency stays at a constant value of ~ 0.14 molecules CO2•electron -1 for all tested stacks, confirming that all electrode pairs behave uniformly, regardless of number of cells in the stack. Overall, the results show that the modules are scalable without loss of adsorptive performance.