Insights
Engineering notes on the energy transition
Practical, vendor-neutral explainers on power equipment, energy storage and EV charging — written by Entogo's engineering team to help utilities, developers and operators specify the right system.
AI & Data Centers
Power equipment for AI data centers: what changes when racks hit 100 kW
AI training loads have pushed rack densities past 100 kW and substation lead times past three years. This is what each layer of the data-center power chain — transformer, switchgear, energy storage — now has to deliver, and where projects actually compress the schedule.
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EV Charging
What does it actually cost to install a DC fast-charger station? A 2026 breakdown
Public ranges for "DC fast-charger installation cost" span $50,000 to over $1 million per site — too wide to be useful. The Atlas/Paren analysis of NEVI awards, NREL deployment data and Rocky Mountain Institute rate-design work converge on a tighter cost stack, and on which lines actually move.
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Market & Supply Chain
Grain-oriented electrical steel: why one Pennsylvania mill sets the clock for the North American grid
Every power transformer needs grain-oriented electrical steel (GOES), and the DOE estimates it is roughly a quarter of large-transformer cost. North America has one domestic producer — Cleveland-Cliffs' Butler Works. This is the supply chain behind the one-to-four-year lead time.
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Market & Supply Chain
How long are transformer lead times in North America in 2026?
In 2026, transformers in North America's merchant market commonly take one to four years to deliver — driven by electrical-steel (GOES) constraints, surging data-center demand and an aging fleet. Manufacturers with their own source factory, such as Entogo at a 12-week standard lead time, sit largely outside that queue.
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Solar-Storage-Charging
Solar-storage-charging integrated systems, explained
A solar-storage-charging system pairs on-site PV, a battery and EV charging behind a single grid connection, so charging draws on stored solar instead of the service entrance — enabling fast charging at sites whose utility supply could not sustain it alone.
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Energy Storage
How behind-the-meter battery storage cuts demand charges
Demand charges are billed on a facility's highest power draw, not its total energy use. Behind-the-meter battery storage discharges during those brief peaks to cap the demand, and shifts cheap off-peak or solar energy into expensive on-peak hours — lowering both parts of a commercial electricity bill.
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EV Charging
AC vs. DC EV charging: what North American sites need
AC charging is slower, cheaper and ideal where vehicles dwell for hours; DC fast charging delivers high power for short stops but needs far more grid capacity. Matching charger type to dwell time, site load and budget is the first decision in any EV charging project.
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Power & Distribution
Prefabricated substations vs. conventional builds: when modular wins
A prefabricated substation arrives as a factory-built, factory-tested package that drops onto a prepared pad, compressing months of on-site construction into days. For space-constrained, schedule-driven or repeatable projects, the modular approach usually wins on time, quality and total cost.
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