CCTV Backup Calculator
Power DVR and cameras through outages.
Step-by-step landing pages for this calculator — pre-filled loads and FAQs.
- Use-case guideCCTV Backup During Load SheddingShops and homes with 4–8 cameras plus DVR typically draw 40–80 W continuous.
- Use-case guideShop & Retail Backup PowerRetailers need POS, LED panels, and often CCTV online 8+ hours; lithium reduces floor space vs tubular.
- Use-case guideHome Office Backup PowerWork-from-home setups need laptop, monitor, router, and often a fan running 4–6 hours per outage.
45W per unit × 1 = 45W for this row
What this calculator does
Sizes backup for typical DVR + 4–8 camera draws so security stays online when the grid drops.
How calculations work
- Add appliances from the Pakistan household and business list, or enter custom wattage.
- Set quantity and required backup hours (typical load shedding window: 2–6 hours).
- We calculate total load (W), energy needed (Wh), and recommended voltage and Ah using depth-of-discharge for your battery type.
- Inverter/UPS VA suggestion includes a 40% headroom factor for motor and surge loads.
Examples
≈75+75+250+12 = 412 W → ~1,900 Wh → 12V 200Ah LiFePO4 class bank for essentials during evening outages.
≈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.
CCTV Backup During Load Shedding
Shops and homes with 4–8 cameras plus DVR typically draw 40–80 W continuous.
Shop & Retail Backup Power
Retailers need POS, LED panels, and often CCTV online 8+ hours; lithium reduces floor space vs tubular.
Home Office Backup Power
Work-from-home setups need laptop, monitor, router, and often a fan running 4–6 hours per outage.