THE DURATION LAB / A VRFB.AI CONCEPT

Power is a rate.
Energy is a reserve.

Get clear on both before the first supplier conversation. Explore vanadium flow batteries, test a simple scenario and leave with better questions.

Open the duration lab →First, the fundamentals →

Educational prototype. Transparent arithmetic. No AI backend, engineering design or commercial offer.

01 / TWO DESIGN CHOICESMW × h = MWh

ELECTROLYTE

EnergyMWh / tanks

⇄circulation

CELL STACKPowerMW / conversion

Two knobs. One system.
Concept diagram, not an equipment layout.

A NAME WITH A SPECIFIC SUBJECT

VRFB.
Four letters.
A different architecture.

VRFB means vanadium redox flow battery. Vanadium-based electrolytes circulate between external tanks and electrochemical cells. Charging stores energy chemically; discharge reverses the process.

At a first-principles level, electrolyte inventory supports energy capacity, while the stack and conversion equipment support power. Changing one still affects the engineering of the whole system.

The .ai ending is a digital-product brand direction here, not evidence of an artificial-intelligence service. This preview uses deterministic calculations only.

Read the science · University of Washington →

Power / MW

The rate of energy delivery at a defined boundary. Ask whether a quoted rating is DC stack output or AC output at the connection.

Energy / MWh

The amount available over time. Specify usable energy, operating conditions and reserve requirements rather than relying on a nameplate alone.

Duration / hours

Energy divided by power at a consistent boundary. An 8 MWh usable reserve supplying a steady 2 MW lasts four hours in the ideal arithmetic.

02 / TRY AN ASSUMPTION, SEE THE CONSEQUENCE

The duration lab.

A requirements conversation starter.
Not a battery sizing recommendation.

ILLUSTRATIVE OUTPUT / NOT A QUOTE

8MWh delivered

2 MW × 4 h = 8 MWh

Power

2 MW

Duration

4 h

Bars use separate scales: power up to 10 MW, duration up to 12 h. Larger inputs cap the bars, not the calculation.

Illustrative recharge energy10.67 MWh

Delivered energy ÷ round-trip efficiency. Applies only when input and output share the same measurement boundary. It is not electrolyte capacity or a tank-size calculation.

What this deliberately leaves out

Load variation, charge windows, auxiliaries outside the efficiency boundary, temperature, degradation, reserve margins, outages, interconnection constraints and commercial terms. A qualified engineer must determine usable capacity and equipment ratings for a real project.

YOUR NEXT CONVERSATION

Turn a number into
a reviewable question.

The calculator prepares results in your browser. The hosting platform uses analytics and technical telemetry. Downloading creates a text file on your device.

Next question

What interval data shows the solar energy actually available during the charging window?

Evidence to bring

Generation and load time series at a matching interval.
Import/export limits and the proposed connection point.
Required delivery window and curtailment history.

Ask the technology provider

Confirm usable AC energy, net AC power, efficiency boundary, ambient range and auxiliary loads against the same duty cycle. Ask which guarantees apply at commissioning and later in service.

03 / QUESTIONS BEFORE COMMITMENTS

A better brief is more than a bigger battery.

01 / Technical What does the system actually need to do?

Write down the delivery boundary, peak and sustained load, required duration, charge window, operating temperature and outage expectation. Then ask for a duty-cycle-based assessment. Independent power and energy sizing is a useful architecture, not unlimited flexibility.

02 / Commercial What would an electrolyte lease change?

It could separate ownership of electrolyte from other equipment in a negotiated arrangement. No lease or finance is offered here. A real comparison must identify title, periodic payments, quality obligations, insurance, recovery, transport, tax and end-of-term responsibilities. Compare the full contract, not just the upfront cost.

03 / Evidence Which claims need a boundary?

Efficiency needs a measurement boundary and duty cycle. Lifetime needs operating conditions and maintenance assumptions. Environmental claims need a defined life-cycle scope and evidence. Ask what was measured, what was modeled and what is guaranteed.

04 / Alternatives Why consider more than one technology?

Space, geology, connection limits, cycling pattern and service requirements can favor different approaches. Pumped hydro, lithium-ion and flow batteries do not share identical constraints. This workshop does not rank suppliers or calculate project economics.

Technical background: PNNL cost and performance research → · DOE flow-battery fact sheet (2012) →

04 / A VISUAL EVIDENCE LIBRARY

See the system.
Question the context.

30 independently sourced pictures.
Real references, never claimed as our projects.
Credits and licenses accompany every image.

Flow batteries

Start with the physical system: tanks, pumps, stacks and a power connection. These independent references show why a flow battery is more than a battery container.

A vanadium redox flow battery stack at UNSW — **A research-scale vanadium flow battery at the University of New South Wales.**Radiotrefoil · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Schematic showing vanadium redox reactions during discharge — **A German-labeled technical diagram illustrates discharge reactions in a vanadium flow battery.**Rrausch1974 · Source → · CC BY-SA 3.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Containerized energy storage installation in Pullman — **The Turner Energy Storage Project demonstrates containerized vanadium flow storage.**UniEnergy Technologies · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Labeled schematic of a redox flow battery with tanks and cell — **A technical schematic shows how electrolyte reservoirs connect to a flow cell.**Nick B, benboy00 · Source → · CC BY-SA 3.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Four graphite flow field plate designs — **Different graphite flow field patterns guide electrolyte through a flow battery cell.**Gary thelake · Source → · CC0
Resized / WebP. Independent reference, not a VRFB.ai project.

Materials

The material matters. Ask for electrolyte specifications, acceptance testing and ownership terms. Mineral specimens here explain context, not usable battery feedstock.

Four colored solutions showing vanadium oxidation states — **Vanadium solutions display different colors across oxidation states.**W. Oelen · Source → · CC BY-SA 3.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Branching metallic vanadium crystal — **A close view of a vanadium crystal.**Tavoromann · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

A bar of metallic vanadium — **Vanadium metal before its use in alloys or chemical systems.**Alchemist-hp pse-mendelejew.de Original uploader was Alchemist-hp (www.pse-mendelejew.de) at de.wikipedia · Source → · CC BY-SA 2.0 de
Resized / WebP. Independent reference, not a VRFB.ai project.

Scanning electron micrograph of vanadium — **Microscopy reveals vanadium surface structure at a much smaller scale.**Boris Lobastov · Source → · CC BY 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Research

Laboratory evidence answers narrow questions. A cell-level finding is not a guarantee of whole-system efficiency or field availability.

Coin cell batteries connected in a laboratory testing fixture — **Laboratory coin-cell testing illustrates the experimental side of battery research.**Chingo K · Source → · CC BY 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Electrochemical sample cell with a syringe and transparent tubing — **An Argonne electrochemical cell designed for high-energy X-ray studies.**U.S. Department of Energy from United States · Source → · Public domain
Resized / WebP. Independent reference, not a VRFB.ai project.

Solar

A solar pairing needs time-series data. Generation peaks alone cannot tell you the amount of energy available to shift into the evening.

Aerial view of a solar installation near Mead Nebraska — **A solar installation seen from above in Mead, Nebraska.**AllTheUsernamesAreInUse · Source → · CC0
Resized / WebP. Independent reference, not a VRFB.ai project.

Photovoltaic panels installed on a farm — **Aerial photography documents photovoltaic generation on agricultural land.**USDAgov · Source → · Public domain
Resized / WebP. Independent reference, not a VRFB.ai project.

Satellite view of Topaz Solar Farm in California — **Topaz Solar Farm shows the land-scale pattern of utility solar generation.**Earth Observatory image by Jesse Allen, using EO-1 ALI data provided courtesy of the NASA EO-1 team. Caption by Adam Voiland. · Source → · Public domain
Resized / WebP. Independent reference, not a VRFB.ai project.

Aerial view of Webberville Solar Farm near Austin Texas — **Large arrays collect solar energy at Webberville, Texas.**The tdog · Source → · CC0
Resized / WebP. Independent reference, not a VRFB.ai project.

Wind

Wind changes over minutes, hours and seasons. Match a proposed storage duty to actual generation and grid constraints rather than annual averages.

Offshore wind turbines at Burbo Bank seen from Crosby — **Burbo Bank wind turbines viewed from the coast.**Sudzie · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Middelgrunden offshore wind turbines outside Copenhagen — **The Middelgrunden offshore wind farm provides a coastal infrastructure example.**Kritzolina · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Wind Lift I installation vessel docked in Emden — **An installation vessel supports the construction and maintenance of offshore wind systems.**kaʁstn (photographer) derivative work: IdLoveOne · Source → · CC BY-SA 3.0 de
Resized / WebP. Independent reference, not a VRFB.ai project.

Grid

The grid connection can define the feasible project. Confirm import/export limits, protection requirements and the measurement boundary before comparing offers.

Transformer and electrical equipment at Muurame substation — **A power transformer at Muurame electrical substation.**Antti Leppänen · Source → · CC BY 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Electrical substation illuminated at night in Vääksy — **A nighttime view of grid equipment at Vääksy.**Unnerving duck · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Outdoor substation switchgear and transformer — **Switchgear and transformers form part of the infrastructure between generation and demand.**Bob Harvey · Source → · CC BY-SA 2.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Electrical transformer in an outdoor substation — **A transformer installation illustrates the physical equipment behind power delivery.**Wikideas1 · Source → · CC0
Resized / WebP. Independent reference, not a VRFB.ai project.

Substation transformer on Love Lane Liverpool — **A substation transformer in Liverpool.**Rept0n1x · Source → · CC BY-SA 3.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Hydro storage

Pumped hydro is a different storage technology. These photographs provide a useful physical comparison: location, reservoirs and infrastructure matter alongside storage duration.

Castaic Power Plant and surrounding reservoir infrastructure — **Castaic Power Plant is an example of pumped-storage infrastructure.**Sirbatch · Source → · CC BY-SA 3.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Aerial view of the Tambara pumped storage site — **An aerial view of Tambara pumped-storage infrastructure.**Geospatial Information Authority of JapanRetouch: Qurren (talk) · Source → · CC BY 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Mountain landscape and distant Żar pumped-storage site seen from Kiczera — **The mountain setting of Żar pumped storage, viewed from Kiczera.**Jendrusk · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Power lines near the Żar pumped storage plant — **Transmission lines connect pumped-storage infrastructure to the grid.**Jendrusk · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

Turbine component inside the underground Veytaux power plant — **Inside the underground Veytaux pumped-storage power plant.**Nairolf Ossum · Source → · CC BY-SA 4.0
Resized / WebP. Independent reference, not a VRFB.ai project.

CLEAR ANSWERS

Before you take the next step.

Does this tool recommend a particular battery?

No. It demonstrates energy arithmetic and helps organize questions. It does not establish feasibility, safety, financial return or a technology recommendation.

Does .ai mean the tool runs an AI model?

No. All outputs here are deterministic calculations and prewritten guidance. The extension is part of the domain identity. No model, account or cloud-processing service is connected.

Is VRFB.ai selling equipment or offering financing?

No. This is a concept/demo website for a domain offered through NameLifter. Illustrative scenarios are not offers. The separate NameLifter link is the genuine domain-sale route.

What is included in the domain sale?

Consult the matching NameLifter listing and seller terms. This preview makes no claim that a website, logo rights, content licenses, technical services or other assets are included.

What happens to workshop inputs?

The calculator keeps its working values in page memory. It requires no account and has no enquiry-submission form. The hosting platform uses analytics and technical telemetry. A session flag remembers only whether the domain-sale dialog has been shown.

A SPECIALIST NAME. AN OPEN POSSIBILITY.

Build the next conversation
around VRFB.ai.

This is an independent concept for a domain offered through NameLifter, not a representation of an operating business.