Buyers comparing options
- The problem
- Vendor claims that cannot be checked and specifications that are hard to read.
- What we do
- Explainers that show the arithmetic and name the numbers that actually predict how a pack behaves.
The analysis behind every recommendation
Energy
Everything on the rest of this site rests on the same body of work: understanding how energy is generated, moved, stored, paid for and regulated in India. We publish that work rather than keep it. The chapter series below start from first principles, the blog covers the industry as it moves, and the calculator does the arithmetic that decides most of these questions.
Capabilities
What Energy covers
First-principles chapter series
Three progressive series covering the physics of electricity, the workings of the energy system, and battery fundamentals — written to be read in order, with figures rather than stock photography.
Industry and policy analysis
Cell supply chains, refining chokepoints, state EV policies, subsidy schemes and grid economics, tracked as they change rather than summarised once.
Working tools
An EMI calculator that shows the APR behind an instalment, so the number you are quoted can be checked rather than taken on trust.
Technical reference
Spec sheets, chemistry comparisons, safety standards and the terms that appear in them — explained once, properly, in plain language.
Where it applies
Three situations we see most often
Stated as the problem first, because the system is only worth specifying once the problem is.
Operators and technicians
- The problem
- Field decisions about charging, balancing, health and failure made on folklore.
- What we do
- Battery fundamentals covering the BMS, the cell, balancing and how packs age.
Anyone starting from scratch
- The problem
- Energy discussions that assume the electrical basics are already in place.
- What we do
- A series that begins at what electricity actually is and builds up to grids, storage and cost.
Run the numbers
The tools behind these arguments
Each of the other three pillars carries a calculator that shows its own arithmetic. They are all open, and none of them ask for an email address.
- BESS savings calculatorDemand-charge and arbitrage savings from a commercial bill, with payback against your own quote.
- Mobility savings calculatorLithium against lead-acid over a holding period, including replacements, charging and cost per kilometre.
- Home Energy savings calculatorPack size from your essential-load list, then the ownership cost against a tubular battery.
- EMI calculatorWork out an instalment from a price and a rate — and the APR actually behind it, including charges.
Further reading
The thinking behind our energy work
- A History of the Battery: From Volta’s Pile to the Lithium CellHistory · 11 min read
- Why China Dominates the Battery Cell IndustryIndustry · 9 min read
- The Real Battery Chokepoint Is Not Cells — It Is RefiningIndustry · 8 min read
- How Power Transmission Works: From the Generator to Your ChargerIndustry · 12 min read
- State EV Policies in India: How to Find What Actually Applies to YouPolicy · 7 min read
- Can India Build Its Own Cell Industry? What It Would Actually TakeIndustry · 8 min read
Questions
The ones we are asked first
- Is any of this behind a form?
- No. Every chapter, article and tool on this site is readable without signing up or handing over an email address.
- Where should I start?
- If you want the electrical basics, start with the rocket-science series. If you already have those and want the system view — generation, grids, storage, money — start with the practical energy guide. If you specifically want batteries, start with Battery 101.
Energy
Tell us what you are trying to power.
Send us the bill, the load list or the duty cycle. We will come back with a size, a cost and the arithmetic behind both — including the cases where the answer is that you do not need us.