“Claims to have a 650VA rating. This translates to "650 Volt Amp Hours". So why, with a 1.5A load, the unit operated for 90min? If this unit was brand new and fully charged, I would expect 1.5A load to survive almost 200min?”
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Amp-hours and volt-amps are different entities. The former is a power measurement and the latter is a capacity measurement. Definitely not the same.
Sorry, there was a problem. Please try again later.Hello, This product is rated for 650 VA/360 WATTS. With a total connected load of 180 watts (1.5A x 120V), the estimated battery runtime would be just under 10 minutes with a fully charged 12V/5.5Ah battery. That’s why the product packaging lists 170W with a Runtime* of 10 MIN. Battery Runtimes are based on testing fully-charged, new batteries at normal operating conditions. Runtimes are approximate and can vary based on battery age, charge level at test, environment, and other variables.
Sorry, there was a problem. Please try again later.650VA means it can provide a maximum current of 5.4 Amps at 120 Volts (120V * 5.4A = 650, rounded to two digits). That says nothing about how long it can do that. The length of time depends on the Amp-hour rating of the battery at a particular load point. So, in your case, it takes 15 Amps from a 12 Volt battery to produce 1.5 Amps at 120 V (neglecting losses, the power from the battery is the same as the power out, so 120 V * 1.5 A = 180 Watts = 12 V * 15 A). You got 1.5 hours of runtime. Assuming your load was constantly running at 1.5 A (120 V), the battery capacity is 15 A * 1.5 hrs = 22.5 A-hrs. That isn't bad for a unit this physical size.
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