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It should work OK with a fan Read the information in the link: - Run-time for delivering 60 watts is 37 minutes. 360 watts is the peak power it can deliver and it doesn't mean it can supply 360 w …

Your UPS has to supply this power. It beats me how you came up with 800 watts but maybe you can clear this up. …

Don't waste your money on a UPS - get the problem fixed. …

I wonder what stops this current from going to the rest of the household circuit This is assured by using a specific wiring spur from your UPS AC output to the circuit in which your critical AC appliances …

It's possible that your AC measurement is also capable of measuring a DC level (many meters will do this) and, it's likely that you are measuring the stored DC voltage on EMI filtering capacitors. Is …

The question is how does this circuit works, special how does Q5 works? and C1, R2. Q5 is operated as a "common gate" amplifier. When the comparator output goes low (ground/0 volts) the lithium …

If you can reduce your requirement to the situation of the car engine being started and the battery voltage being significantly lower than 12 volts then try using a boost regulator set to produce 15 v …

You can use a 2nd order low pass filter made from an inductor (in series with the AC) and a capacitor to neutral. You will also need a resistor: - simulate this circuit – Schematic created usin …

Use a relay with an AC coil to enable the output from the wall wart (and disconnect the battery) then, when AC is lost, the relay switches in the battery with it's normally closed contact whilst simul …

If it's a UPS it must have a battery and for that battery to be charged there has to be one or more forms of rectification to convert the incoming AC to a DC form that can be regulated to charge the battery … The presence of a rectifier is implied whether it be UPS based inverter or, an inverter without an internal battery. …

More than likely it is an unintentional airborne EM transmission of noise caused when the 'fridge motor stops turning when the fridge has reached the lowest temperature it is set to. It takes two thin …

undesirable effect for (say) 30 seconds then, when you assess the AC line to be good (circuit that looks for a stable AC voltage), activate the previously mentioned relay to bring grid power back to your UPS … would adding a voltage stabilizer in series with the offline UPS help avoid the shutdowns? Impossible to say but, why bother when you can solve it the way I suggest above. …

A battery may be stated as having a capacity of 9 Ah but many circuits won't be able to use all that capacity and, in your particular case that is self-evident. If the load is 100 watts and, it can be …

Would a UPS be fast enough to handle power dips? … I think you broadly misunderstand how a UPS works; the battery is nearly always active all the time and is recharged by the incoming AC (rectified and processed). …

If you are converting AC mains voltages to 12V DC for the battery, the most efficient way to do this is via a transformer and you get the added benefit of the transformer giving you isolation thus, if …