#Energy Storage
Power Engineering Primer
September 7, 2026
Power Battery Primer — From Cell Chemistry to Grid-Scale Storage and the BMS
A battery isn't a "power plant that stores electricity" — it's a piece of power equipment that shifts supply and demand across time. This article works through cell voltage, capacity, and C-rate, SOC/SOH, thermal runaway, safety design, grid-scale storage and V2G, and cutting-edge research such as solid-state batteries, with the math and charts.
Fundamentals · 6 min Power Engineering Primer September 4, 2026Pumped Hydro and Hydrogen Storage Primer — Choosing Between Storage That Spans Hours and Storage That Spans Seasons
Lithium-ion batteries are strong at balancing supply and demand over minutes to a few hours, but filling in longer timescales needs a different technology. This article works through pumped hydro's round-trip efficiency and variable-speed operation, green hydrogen's electrolysis, storage, and reconversion, real projects, and an efficiency comparison table to lay out the design thinking behind large-capacity, long-duration storage.
Fundamentals · 9 min