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• Various aesthetic/energy-saving functions integrated into the electrochromic glass. • The devices could be tuned for four distinct user-selective operational modes. • The energy-saving is comparable to the energy-generation of Si-solar cells. • The devices exhibit charge-storage ~400 Ccm−3@10 mVs−1 (C ~ 21 Fcm−3 @ 0.1 mAcm−2). A generic strategy of incorporating diverse functions in electrochromic dynamic windows is presented by sensibly choosing the individual layers of a bilayered active electrode. Here, all-solid electrochromic devices (ECD) with a remarkably high visible modulation (60–80%) and superior near-infrared (NIR) shielding performance (>90% full scale) were fabricated by simple solution-processing. The concept is demonstrated by selecting materials with identical chemical composition, i.e., porous amorphous-WO 3 (a-WO 3) coated on top of polycrystalline WO 3 ·H 2 O nanosheets. These ECDs show four distinct voltage-selective modes in the ± 2.8 V range for enhanced privacy and energy saving. The IR modulation efficiency (IRME) of the devices stands at a record ~85%, with an outstanding solar modulation efficiency (SME) of ~63%. The initial energy storage estimations for the ECDs revealed superior volumetric stored charge density of ~400 Ccm−3@ 10 mVs−1, which is excellent for secondary energy sourcing. The fabricated EC glasses (with 50% usage) could directly save ~165 kWhm-2 yr-1 worth of energy by equating the energy-saving and generation. With reflected radiation reduction, the total saving may surpass the total energy generation from standard Si-Solar cells (~18% efficiency) of equal areal coverage. [ABSTRACT FROM AUTHOR]