Home appliances
People buy an inverter by price and then wonder why the fan stops in an hour. The inverter's VA decides how much you can run; the battery's Ah decides how long.
A few questions about your situation, not about the product.
Answer all 2 questions to see the spec sheet to shop with.
How much load the inverter can carry at once.
Why it matters
Total watts you'll run ÷ 0.7 = VA needed. Overloading trips or damages the unit.
What to check
Add up actual wattages: fan 75W, tube 20W, TV 100W, fridge 200W (surge much higher).
How long it can supply that load.
Why it matters
Backup hours ≈ (Ah x 12 x 0.7) ÷ load in watts.
What to check
150 Ah tubular is the common sweet spot for 3–4 hours of fans and lights.
Shape of the output current.
Why it matters
Pure sine wave is required for fridges, computers and modern TVs; square wave hums and heats motors.
What to check
'Modified sine' is a compromise — avoid it if you'll run a fridge or PC.
Construction of the battery.
Why it matters
Tubular lasts 4–5 years with deep cycles; flat plate is cheaper but dies faster; lithium is maintenance-free and compact but costly.
What to check
Tubular needs distilled water topping every 3–4 months.
How fast it recharges and how the warranty is split.
Why it matters
In areas with long cuts, higher charging current matters. Battery warranty is often part full, part pro-rata.
What to check
Ask exactly how many months are full replacement vs pro-rata.
700 VA basic setups to 1500 VA sine-wave with tubular batteries.
