Electricity bills from your tariff, appliance and standby costs, EV charging, generator fuel, UPS backup time, solar sizing and battery storage - 276 engine-verified calculators across ten signed packs, fully on your device. Scrub any input and watch every result update live, reverse-solve to the answer you want, and open any result to see the formula, the pack version and how sensitive it is to each input. No accounts, no ads, no tracking. Preliminary sizing reference - verify with a qualified installer or engineer.
Electricity bill from units and your tariff, appliance running cost and standby (vampire) cost, AC / heater and water-heater running cost, EV charging cost and range per charge, generator fuel estimate, UPS / inverter backup time, LED vs incandescent savings, motor consumption and energy unit converters (kWh / MJ / BTU).
The Solar PV Toolkit covers array & string sizing, inverter ratio, kWh/kWp yield with performance ratio, tilt & orientation factors, payback & LCOE-lite and solar-plus-storage sizing. Battery & Storage sizes a bank from your load profile: usable capacity & depth of discharge, C-rate charge time, runtime under load, degradation estimate and cost per usable kWh.
One guided flow from array size to yield to battery to payback - or jump straight to a single calculator. Each step hands its result to the next, so the chain stays consistent.
Scrub any input and watch every result update live. Reverse-solve: pick the result you want and see what input gets you there.
Open any result to see the formula, the signed pack version it came from, and how sensitive it is to each input. If a result cannot be computed honestly, the app refuses and says why - it never guesses.
Runs entirely on your device. No account, no ads, no tracking, no network. Every calculation comes from a cryptographically signed, verified calculation pack.
The catalog as it actually stands. Packs ship to users only after their expert review clears.
The core energy toolkit, forever: electricity bill from your tariff, appliance and standby costs, AC / heater and water-heater running cost, EV charging cost and range, generator fuel, UPS / inverter backup time, LED savings, energy unit converters and a solar quick-payback teaser. On-device, no account, no tracking.
Free means free: no account, no trial clock, nothing expires.
Final prices land per market at launch. What you buy keeps working offline, forever.
Yes, entirely. Every calculation runs on your device with no network calls.
No. EnergyVecta is a preliminary sizing reference - tariffs, factors and prices are your inputs; results are not a code-compliance determination or a quote. Verify with a qualified installer or engineer.
276 calculators across ten signed packs: the core energy toolkit, Solar PV, Battery & Storage, Home Efficiency, Oil & Gas Field, Pipeline Hydraulics, Gas Processing, Gas Properties, Compression, and Flare & Relief. Every pack is signature-verified on your device before it opens.
EnergyVecta keeps calculator inputs and working history on your device. Optional purchases are handled by the purchase channel, and minimal license identifiers may be processed only to issue, restore, refund, or revoke offline licenses. Knowledge packs state their review status on their face before they are used by the app.
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