Before the demand surges,
we’ll help you capture the current

Good Egg Energy is a consultancy and supplier of power-generation and energy-storage solutions, focused on ensuring power is where you need it, when you need it, so you’re covered before demand surges.

At GEE, we source and supply products that reduce dependency on the grid, are plug-and-play models for easy setup, and all contain the power to scale.

Building upon decades of experience in renewable energy and electrical efficiency, GEE is built to partner with you, meet any project needs, and support decisions that sustain the flow of energy before a brownout can break the chain.

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BESS 101

BESS 101 · Chemistry

Battery chemistries for BESS

From today’s workhorse to tomorrow’s contenders. The bars show how ready each one is for real projects.

Ion batteries

Energy-dense and fast to respond

  • The workhorse

    Lithium-ion

    The market leader. High energy density, fast response and falling costs.

    Mature
  • The challenger

    Sodium-ion

    Abundant, lower-cost materials. A strong fit for stationary storage.

    Early commercial
  • The long shot

    Magnesium-ion

    A promising low-cost chemistry, still in the lab.

    Research

Flow batteries

Built for long-duration storage

  • The marathoner

    Vanadium redox flow

    Long service life and a non‑flammable electrolyte. Proven at large scale.

    Commercial
  • The newcomer

    Organic aqueous flow

    Water‑based, non‑flammable and designed to be low-cost.

    Pilot
  • The dark horse

    Zinc-polyiodide flow

    Abundant materials and high energy density for a flow battery.

    Research
~90%

of new battery storage projects use LFP (lithium iron phosphate), a type of lithium‑ion.

Source: IEA, Global Energy Review 2026. Readiness ratings are a general guide and vary by vendor.

BESS 101 · Customers

BESS by customer segment

Who buys storage, what bugs them, and what wins them over.

SegmentWho they areWhat they needCommon painsWhat wins them
UtilitiesTransmission, distribution, regional and mixed utilities
  • Reliable power
  • Grid integration
  • Long asset life
  • Asset utilization
  • Grid congestion
  • Aging infrastructure
  • Capital cost
  • Strong grid connection
  • Robust monitoring
  • Flexible dispatch
  • Low-cost, secure hardware
Independent Power ProducersOwners of renewable and storage projects
  • Grid-code compliance
  • Investment returns
  • Flexible assets
  • CAPEX and OPEX
  • Permitting and approvals
  • Market access
  • Service delivery
  • Scalable systems
  • Interoperability
  • Integrated controls
  • Central monitoring
Commercial, Industrial & PublicBusinesses, industrial sites and public organizations
  • Reliable, affordable power
  • Minimal disruption to operations
  • Energy costs
  • Emissions targets
  • Operational disruption
  • Demand management
  • Backup power
  • Simple integration
  • Low-disruption installs
System IntegratorsHardware, software and engineering providers
  • Compatible technology
  • Compliant technology
  • Engineering time
  • Changing requirements
  • Integration risk
  • Modular design
  • Easy commissioning
  • Open interfaces
  • Flexible configurations
OEMsBattery and equipment manufacturers
  • Reliable system integration
  • Market access
  • Lifecycle management
  • Service support
  • Pace of innovation
  • Open connectivity
  • Scalable platform
  • Rapid deployment
  • Proven utility experience
  • Needs and wins
  • Pain points

BESS 101 · Applications

Storage options by application

Batteries aren’t the only answer. Here’s what fits each job on the grid.

  • Battery storage
  • Other storage

Generation

Where power is made

Grid support

  • Frequency regulation
  • Renewable smoothing
  • Lithium-ion (battery)
  • Sodium-ion (battery)
  • Flywheel (other storage)

Energy management

  • Capacity firming
  • Load following
  • Time shifting
  • Backup power
  • Sodium-ion (battery)
  • Pumped hydro (other storage)
  • Compressed air (other storage)

Transmission & Distribution

Moving power across the grid

Network support

  • Upgrade deferral
  • Congestion relief
  • Sodium-ion (battery)
  • Nickel-cadmium (battery)
  • Battery + supercapacitor hybrid (battery)

Voltage support

  • Voltage stability
  • Reactive power support
  • Lithium-ion (battery)
  • Sodium-ion (battery)
  • Flywheel (other storage)

Customer-Sited

Behind the meter, at homes and businesses

Reliability

  • Customer backup
  • Service continuity
  • Power quality
  • Valve-regulated lead-acid (battery)
  • Advanced lead-acid (battery)
  • Lithium-ion (battery)

Cost control

  • Time-of-use savings
  • Demand charge reduction
  • Lithium-ion (battery)
  • Lead-acid (battery)
  • Thermal storage (other storage)

Options are listed by typical fit. The right choice depends on duration, response time, site and cost.

BESS 101 · Quick facts

BESS quick facts

The five questions we hear most, answered in a sentence or two.

Project scale

How big do batteries get?

The largest grid batteries now store over 3,000 MWh. California’s Edwards & Sanborn holds about 3,300 MWh.

3,300MWh in one project
Efficiency

Which battery is most efficient?

Lithium-ion leads, returning about 85–90% of the energy put into it. That’s one reason it dominates new projects.

85–90%round-trip efficiency
Advanced storage

What makes energy storage “advanced”?

Smart controls. The system charges when power is cheap or plentiful, then releases it when demand peaks.

Best technology

Which technology is best?

It depends on the job. Batteries, pumped hydro, thermal and hydrogen each suit different durations and scales.

Challenges

What are the main challenges?

Safety, testing, grid connection, controls, cost and long-term performance.

Question we missed? Let’s talk.

Project data as reported in 2026 industry rankings. Efficiency is a typical range for lithium-ion systems and varies by design and use.