VoltBridge Intel

Energy guides

Reference explainers for the technologies, markets and rules shaping the energy transition. Each guide is written by hand, cites public sources and is free to read.

FERC Order 2023 Explained: How the U.S. Is Fixing Interconnection Queues

FERC Order 2023 overhauled how new power plants and batteries connect to the U.S. grid. Learn what changed: cluster studies, readiness deposits, study deadlines and penalties.

Floating Offshore Wind: How It Works and Where It's Headed

Floating offshore wind puts turbines on anchored platforms in deep water where fixed foundations can't reach. Learn the platform types, key projects, costs and challenges.

Flow Batteries Explained: How They Work and Where They Fit

A flow battery stores energy in liquid electrolytes held in external tanks. How vanadium and other flow batteries work, their pros, cons and uses.

Grid-Scale Battery Storage: How Utility Batteries Work and What They Do

Grid-scale battery storage uses large battery systems to store and release power for the grid. Uses, sizes, revenue streams and limits explained.

Iron-Air Batteries: How "Rust" Could Store Power for 100 Hours

Iron-air batteries store energy by rusting and un-rusting iron. Learn how they work, how they compare with lithium-ion, and where multi-day storage fits on the grid.

LFP vs NMC Batteries: Differences, Pros and Cons

LFP vs NMC: compare lithium iron phosphate and nickel manganese cobalt batteries on energy density, cycle life, safety, cost and where each is used in EVs and grid storage.

Long-Duration Energy Storage (LDES): Technologies and Why It Matters

Long-duration energy storage delivers power for 10+ hours to days. The technologies, costs and role of LDES in a high-renewable grid.

Pumped Hydro Storage Explained: How the World's Biggest Battery Works

Pumped hydro storage moves water between two reservoirs to store and release electricity. Learn how it works, its efficiency, costs and why it still dominates grid storage.

Round-Trip Efficiency Explained: How Much Energy Storage Gives Back

Round-trip efficiency is the share of electricity you get back from storage compared with what you put in. Compare lithium-ion, pumped hydro, flow batteries, hydrogen and more.

Sodium-Ion Batteries: How They Work, Pros, Cons and Uses

Sodium-ion batteries replace lithium with abundant sodium. How they work, how they compare with lithium-ion and LFP, and where they are being used.

Vehicle-to-Grid (V2G) Explained: Can Your EV Power the Grid?

Vehicle-to-grid (V2G) lets electric vehicles send power back to the grid. Learn how bidirectional charging works, V2G vs V2H, which cars support it, and what is holding it back.

What Is a Capacity Market? How Grids Pay to Keep the Lights On

A capacity market pays power plants, batteries and demand response to be available during future peak demand. Learn how capacity auctions work, PJM's record prices, and the debate.

What Is a Megawatt? MW vs MWh Explained Simply

A megawatt (MW) is one million watts of power. Learn the difference between MW and MWh, how many homes a megawatt can power, and how to read energy project sizes.

What Is a Virtual Power Plant (VPP)? How It Works and Why It Matters

A virtual power plant links thousands of home batteries, EV chargers, thermostats and solar systems so the grid can dispatch them like one power station. Here's how VPPs work.

What Is an Interconnection Queue? Why Clean Energy Projects Wait Years

The interconnection queue is the line projects join to connect to the grid. Why queues are so long, how studies work and what reforms change.

What Is Demand Response? How Paying Customers to Use Less Power Works

Demand response pays homes and businesses to shift or cut electricity use when the grid is stressed. How it works, who pays and why it matters.

What Is Grid Modernization? Smart Grids, Sensors and Upgrades Explained

Grid modernization means upgrading the power grid with digital controls, sensors, automation and new hardware. What it includes and why it matters.