Power Calculators

WiFi & Router Backup

Keep fiber and WiFi online during load shedding.

Backup Power for WiFi Router & Fiber ONT
Related sizing guides

Step-by-step landing pages for this calculator — pre-filled loads and FAQs.

Backup Power for WiFi Router & Fiber ONT
Enter your load

12W per unit × 1 = 12W for this row

15W per unit × 1 = 15W for this row

What this calculator does

Optimized for low-watt network loads (router, ONT, switch) common for work-from-home and freelancers.

How calculations work

  1. Add appliances from the Pakistan household and business list, or enter custom wattage.
  2. Set quantity and required backup hours (typical load shedding window: 2–6 hours).
  3. We calculate total load (W), energy needed (Wh), and recommended voltage and Ah using depth-of-discharge for your battery type.
  4. Inverter/UPS VA suggestion includes a 40% headroom factor for motor and surge loads.

Examples

2 fans + fridge + router (4 hours)

≈75+75+250+12 = 412 W → ~1,900 Wh → 12V 200Ah LiFePO4 class bank for essentials during evening outages.

Shop POS + lights (8 hours)

≈50+120+80 W × 8 h → consider 24V lithium for efficiency on longer commercial backup.

Common mistakes

  • Using nameplate watts for fridges and AC without duty-cycle (use average draw or our presets).
  • Ignoring inverter efficiency (we add ~15% margin on Wh).
  • Sizing lead-acid to 100% depth of discharge — use 50% DoD for flooded/tubular.

FAQs

Relevant landing pages

Dedicated guides with pre-filled calculator settings for common Pakistani setups.