Solar, storage and hybrid plants for industry, with the switchboards built in our own works.
Electricity bill analyser
Landed cost per unit, demand charge share, load factor and where the saving is. Start here.
Analyse my billFifteen free engineering tools
Work out your own numbers before you talk to anyone
The calculators our estimation team uses as a first pass, in your browser. The headline numbers are instant and free. The detailed report, with sizing, capex and payback, is unlocked once with a code to your work email and then stays open across every tool. Nothing else is sent anywhere.
Bills and savings
Start here if the question is what you pay and where the saving is.
Demand charge calculator
What the DISCOM bills you for demand, and what a peak-shaving battery saves every month.
Calculate my savingPower factor and APFC calculator
Capacitor bank to reach your target PF, the kVA it frees, the penalty avoided and the payback.
Size my APFCTime-of-day tariff calculator
What a battery earns by charging at night and discharging in the peak, and the size that fits.
Calculate my spreadContract demand optimiser
Twelve months of maximum demand to the contract demand that costs least under the floor and penalty rules.
Find my best contract demandOpen access savings calculator
True landed cost of open access power after surcharges, wheeling, losses and banking, and the saving.
Calculate my savingSolar and storage
Sizing, payback and generation for a plant that wants to generate and store its own power.
DG replacement calculator
What a diesel unit really costs, the storage that replaces most DG hours, and the payback.
Size my storageSolar and storage payback estimator
Solar sized to your daytime load, whether storage fits, capex and payback of each option.
Estimate my paybackBattery sizing calculator
Critical load and autonomy hours to kWh, PCS kW, cabinets or containers, floor space and capex.
Size my batterySolar generation estimator, Gujarat
District yield, roof area to kWp, year-one and 25-year units, saving and carbon avoided.
Estimate my generationCarbon savings calculator
Baseline emissions, tonnes avoided by solar and storage, renewable share, tree equivalent.
Calculate my emissionsElectrical design
For engineers specifying the switchboard, cables and transformer the plant will hang on.
Transformer loading and solar headroom
Loading today, incomer current and rating, and how much solar your transformer can take before an upgrade.
Check my transformerLT cable size and breaker calculator
Full-load current, breaker rating, cable size for current and voltage drop, parallel runs.
Size my cableBusbar size calculator
Standard flat bar section per phase, bars per phase, current density, neutral and earth, weight per metre.
Size my busbarFault level and panel rating calculator
Short-circuit current at the LT bus, peak current, switchboard Icw and breaker Icu to specify.
Calculate my fault levelWant us to run it properly?
Send twelve months of bills and get a six-page feasibility study in three working days: real cost per unit, a sized system, payback and an indicative single-line diagram.
Get a free feasibility studyIndicative calculation; verify with engineering before ordering. Tariff thresholds, penalties and prices are editable in every tool; use the figures from your own tariff order and quotations.
Which tool to use first
Start with the bill analyser: it tells you where the money is going. If demand charges are a large share, go to the demand charge calculator and the contract demand optimiser. If DG hours are high, go to the DG replacement calculator and the battery sizing tool. The payback estimator and the generation estimator cover solar. The electrical design tools are for the engineer specifying the switchboard the plant will hang on, and every one of them tells you what to ask for rather than what we claim.
