Appliance load
Start from a job, then edit quantities. Hours are per day. What each use case means →
Twelve calculators · one BOM
Size the system before anyone sells you a “package”.
City sun hours, September 2026 SKUs (Hi-MO X10 645 W default, Dyness 5.12 kWh LFP, net-billing export Rs 11), XLPO cable, 14 SWG iron. Figures are street ranges — confirm live stock. What’s latest this month →
Bill → system size
Uses the tariff slider and monthly bill above. Reverse-engineers kWh, then PV for your city PSH.
Plate count & roof
How many modules, roof area, strings, and plate-only cost for the selected SKU.
Inverter sizing
AC rating from peak load × 1.25, vs selected hybrid/on-grid SKU PV input.
Battery backup
Hybrid vs on-grid vs off-grid
Same plate count. On-grid has no battery. Hybrid adds one 5 kWh LFP. Off-grid adds two.
Wire / voltage drop
Iron / structure
Kits of the selected L2/L3/L4 or rail SKU, plus clamp allowance and elevated adder.
Full BOM quote
Plates + inverter + battery (from night load/hours) + iron + 40 m DC pair + protection + labour.
ROI & payback
Annual yield from city PSH × derate. Savings assume 75% self-consumption at your tariff.
Tube well / agri
Net-billing check
NEPRA SRO 251(I)/2026 is net-billing. ≤25 kW usually skips concurrence. Green meter price is the DISCO demand notice, not a shop SKU.