Tier-2 GridPP Pledge Levels Posted on 3rd November 2016 at 9:18 am.Written by Pete Gronbech gridpp5-tier-2-pledge-levels-defined-nov2016 GridPP5-Tier-2 2018 Pledge levels-at Sep2017 GridPP5plus-Tier-2-2019-Pledge-levels-at-Oct2018 GridPP5-Tier-2-2020-Pledge-levels-at-Sep2019