Electronic Supplementary Material for Deliverable 2.7 "Report on the final heat storage block design and long term reliability experiments". A set of fast-forward videoclips compiled based on the images recorded during the long-term experiments on small containers filled with PCM candidates and subjected to thermocycling procedure including consecutive melting/solidification. Details on involved materials and applied temperature profiles are described in D2.7. The list of attached movies: 2908: Si+B mixture (3.2B wt%)/small container made of pure h-BN HeBoSint D100 (Henze, Germany) 2909: Si+B mixture (3.2B wt%)/small container made of h-BN composite HeBoSint O120 (Henze, Germany) 2910: Si+B mixture (3.2B wt %)/small container made of porous graphite (Kryzaplast, Poland) 2911: Si+B mixture (3.2B wt %)/small container made of h-BN composite HeBoSint O120 (Henze, Germany) 2969: Fe-Si-B alloy produced by NTNU/small container made of dense graphite IG-15 (Tanso, Sweden) 2970: Fe-Si-B alloy produced by NTNU/small container made of pure h-BN HeBoSint D100 (Henze, Germany) 2971: Fe-Si-B alloy produced by NTNU/small container made of h-BN composite HeBoSint O120 (Henze, Germany) A more detailed description of the experimental complex is shown elsewhere: Sobczak N, Nowak R, Radziwill W, Budzioch J, Glenz A, Experimental complex for investigations of high temperature capillarity phenomena, Mater Sci Eng A 495 (2008) 43–49