Volt Silverline

1000 w 12v -230V inverter wont power 950 w machine. help?

I have a commercial candyfloss machine that is 950W 220V.

You need a generator for continuous power above 200watts or so.
and for saftey and reliabilty at least 50% of not 100% over capacity.. to not be putting a strain on it. There are many small quiet and light generators capabable of 13A or more these days…. and a lot less hassle (and weight !) than recharging a battery.

Car batteries, especially marked ‘leisure’ rather than Heavy Duty are not designed for continuous high output. The typical rating for batteries is for 20hour use, 88/20 = 4.4 amps continuous (i.e. average with peaks above this)

Also Watts is not the same as VA = Volt Amps, which is what transformers and inverters really are rated in. Flouesrant tubes/Eco bulbs and Motors have a higher VA rating than Watts. Due to a thing called reactive power.

a bettery will normally be expected to give say 10-20% max of its rated Amp-Hour rating as a short term peak with the 5% being average. To run at higher risks the battery exploding with hot lead plates and acid (!) as the gases buildup.

The gas on the plates has to be given time to leave, or it stops the battery working. A measure of this is the CCA – Cold Cranking Amperage.
“The cold cranking ampere (CCA) rating refers to the number of amperes a battery can support for 30 seconds at a temperature of 0 degrees F until the battery voltage drops to 1.20 volts per cell or 7.20 volts for a 12V battery”

So 30 seocnds after pulling 750 amps, your battery would be at 7 volts not 12 !
That is to start an engine not run it
(as below) to pull 90 amps is probably dropping volts on cables (I doubt yours are rated for 90 amps) and in the battery itself.

950watts/12 volts approx 90 amps is on the very very high side for a battery. Basic electricaly theory says, even with 0.1 ohm connections/not thick enough cable you would lose 9 volts on the cables….

10 amps (10%) of the 88Amp Hour capacity is more like what you can expect on a continuous basis. So 10 batteries in parallel would manage it, but you would also need to same well electrically engineered cabling (copper bus bar) to allow that to work safely and reliably without loss of power.

Your solution:
230v generarator of at least 2KVA for a 950 watt load, espcially as a motor will have a higher startup current to kick it into action.. even if the 950 is the continuous current.

as a final note, please for yours and your customers saftey, please check out the electrical saftey and grounding requirements for temporary/portable equipment running at 220v (or even 110v). There are both recomendations and requirements on cables and connector types (things get wet/damp), thicknesss of insulation and colours to be used.
They also will need PAT testing..
And ensure you have an RCD covring the equipment.

all the best