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Green Energy Tools

Free online calculators to help you size, plan and optimize your LiFePO₄ battery system.

🧮 8 free calculators + QR decoder ⚡ Instant results 🇵🇰 Tuned for Pakistan
Free Tools

Plan Your Battery System Right

Use these calculators to determine the correct battery size, runtime, solar panel requirements, charging time, inverter size and cable size for your setup.

🔋Battery Capacity Calculator

Calculate the usable energy in your battery pack (Wh / kWh).

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⏱️Runtime Calculator

Find out how long your battery will power your load.

💡 Tip: A 48V 200Ah battery = 9,600 Wh. Inverter efficiency (~88%) is already factored into the result.
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🌞Solar Panel Sizing

Determine how many solar panels you need to charge your battery daily.

📍 Pakistan average peak sun hours: 5–6 hrs/day (varies by city).
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🔗Cell String Calculator

Find the correct series cell count for your target voltage.

ℹ️ 48V LiFePO₄ = 16 cells in series (16S × 3.2V = 51.2V nominal)
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⚡Charge Time Calculator

Estimate how long it takes to fully charge your battery from a given SOC.

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🔌Inverter Sizing Calculator

Work out the minimum inverter (VA) rating for your connected load.

⚙️ Motors and compressors draw a surge current at start-up — the multiplier covers that surge so the inverter doesn't trip.
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📏Cable Size Calculator

Find the minimum copper cable size to keep voltage drop in check.

📐 Sized to keep voltage drop under 3% (copper), rounded up to the nearest standard cable size.
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📋 BMS Quick Reference

JK Smart BMS default protection values for LiFePO₄.

Cell Overcharge
3.65V 3.35V release
Cell Over-discharge
2.50V 2.95V release
Charge Over-current
210A 1s delay
Discharge OC (L1)
210A 10s delay
Discharge OC (L2)
250A 1s delay
Short Circuit
≥2000A 350µs
Charge High Temp
55°C 50°C release
Discharge High Temp
60°C 55°C release
Charge Low Temp
-5°C 0°C release
Balance Trigger
15mV diff 5mV stop
Full Documentation →

💰Cost Per kWh Delivered

Compare real lifetime cost of LiFePO₄ vs Lead-Acid — see which battery actually saves you money.

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📷 Cell QR & Barcode Decoder

Scan or upload a manufacturer QR/barcode (EVE, REPT, CATL, Gotion, CALB and more) to instantly decode cell batch, grade and production data.

Open QR Scanner →

Need Help Sizing Your System?

Our team can provide a free custom energy assessment and battery recommendation for your home or business.

📋 Get Free Survey 💬 Contact Us