HOME NETWORK PLANNINGCatch power shortfalls
Catch power shortfalls
before installation.
Check PoE power and port headroom, then estimate UPS runtime. We show assumptions and limits before product pitches.
TWO CHECKS BEFORE PURCHASE
A single rating never tells the whole story
PoE requires both power and port checks. UPS sizing separates VA/W capacity from battery energy.
01 / PoE
PoE power budget calculator
Add each device’s maximum draw and quantity, then test switch power and ports with your chosen headroom.
Start calculation →02 / UPSUPS runtime estimator
Estimate runtime from battery V/Ah, loss factors and actual watt load, while checking W and VA ratings separately.
Start calculation →DESIGN PRINCIPLES
Assumptions stay visible
A
Use maximum draw
Use the manufacturer’s maximum input, not an observed average, to avoid undersizing.
B
Separate loss factors
Adjust inverter efficiency and usable battery factor independently.
C
Prefer manufacturer data
If a model has an official runtime curve, prefer it over a simple Wh estimate.