ELI5: "Electricity Numbers"

[Loafy]

Hi All,

I know nothing about electricity and I'm now trying to buy an inverter/battery combo without being duped.

Can someone please ELI5 all of those "Electricity Numbers" on the back of my appliances and how they all link up in order to calculate how they compare to the inverter/battery system I'm interested in?

Appliances:
Sound Bar: DC24V (solid line over dashed line) 27W
Sound Bar Sub: AC 110-240V~50/60Hz 28W
TV: AC100-240V~50/60Hz 255W
Router: 12V (solid line over dashed line) 0.5A

Inverter/Battery Combo:
Rating: 1500VA / 1000W / 1,5KVA; Voltage: 24V.

I'm trying to make an Excel file to calculate, but I have no idea what any of this means.

Any help would be appreciated!

 

[Sinbad]

Ignore everything except the W figures. That's power.

All your appliances must add up to less than your inverter's power

 

[wingnut771]

Hi All,

I know nothing about electricity and I'm now trying to buy an inverter/battery combo without being duped.

Can someone please ELI5 all of those "Electricity Numbers" on the back of my appliances and how they all link up in order to calculate how they compare to the inverter/battery system I'm interested in?

Appliances:
Sound Bar: DC24V (solid line over dashed line) 27W
Sound Bar Sub: AC 110-240V~50/60Hz 28W
TV: AC100-240V~50/60Hz 255W
Router: 12V (solid line over dashed line) 0.5A

Inverter/Battery Combo:
Rating: 1500VA / 1000W / 1,5KVA; Voltage: 24V.

I'm trying to make an Excel file to calculate, but I have no idea what any of this means.

Any help would be appreciated!

Get a killawatt and measure as usually those power ratings are not accurate and you end up overspeccing.

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Then don't get a PC UPS, those are not meant to run long. Get an inverter/deep cycle battery combo like the mecer.

Mecer 2400VA Inverter (Community Support)

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[Loafy]

Ignore everything except the W figures. That's power.

All your appliances must add up to less than your inverter's power

Many thanks for the information. Is there a way of calculating how long the batteries would last with all that plugged in?

 

[wingnut771]

Many thanks for the information. Is there a way of calculating how long the batteries would last with all that plugged in?

Use the killawatt to see what your Wh are for the time you need to run it. Calculate battery size: 12V x 100Ah = 1200Wh. Volts times amps = watts. But you can only use half the battery capacity or else you'll damage the battery. Inverter inefficiencies is about 80% so 600W times 0.8 = 480Wh from 100Ah battery. So if you're using 200W, 480 divide 200 = 2.4 hours.

 

[Sinbad]

Many thanks for the information. Is there a way of calculating how long the batteries would last with all that plugged in?

You'd need to know the capacity of the batteries in amp-hours and their voltage. Also their safe discharge SoC.