UPS capacity for how many VA/watts it can handle and how long it will run are completely unrelated. A lot of UPS models in the same line will all use exactly the same battery packs. A typical setup is 2 to 4 7Ah sealed lead acid 12v batteries. If you have a 2-cell battery pack, that's 2*12v*8A == ~170 Watt/hours. Assuming the inverter is 90% efficient, and your 380 watts of power need, expect about a 20 minute runtime. More on reddit.com

Just use Pirate Ship. That's what I do anyway, better layout, actual customer service, and an insurance product that may just actually pay when needed. More on reddit.com

I've found the calculator to be very accurate (for both UPS and FedEx) IF you measure & weigh correctly. UPS was only added to eBay fairly recently and I've been auditing my shipments exactly to ensure no upcharge 'gotchas'. So far entirely accurate. By 'measuring correctly' I mean realize that 37.01" x 19.01" x 2.01" and 11.01 lbs should be entered as 38x20x3 @ 12 lbs. Similarly, be careful of 'irregular' sizes: if your package is 38x20 but one end is 3" high and the other is 2" high, that's 38x20x3 - you don't take the 'average' or anything. Another 'gotcha' is if you buy or get boxes with the 'size' printed on them, that's the INTERNAL dimensions. So if you take a box that says "12x12x12" and ship it using "12x12x12" as the dimensions, you're likely to get hit with an 'upcharge' for a 13x13x13 box... Also realize that the UPS charges the greater-of actual weight or 'dimensional' weight (based on size). So if a 0.1" or 0.1 lb difference you didn't include puts you from one into the other, charges can go up notably: basically you're jumping to a higher rate-tier. Also, if you ship a box that ends up bigger or heavier than UPS Ground actually handles, there's not just higher shipping fees, but a 'penalty' fee as well... So if you're mailing a box that's 149.9lb make DAMNED sure your scale is accurate, because if it's actually 150.1 lbs, you could face some SERIOUS upcharges. Given all the above, I've found IF you put in the truly-correct information, the calculated cost is very accurate. There do seem to be some legit horror-stories about folks getting whacked with completely overstated charges. But MOST of the ones I've seen where real info eventually got provided, it turned out to be mismeasurement and/or 'hoping to slide one by'... More on reddit.com

This is something every Canadian learns, along with our national anthem ("Ode to the Moose") and national pastime (roller hockey).

Never ship UPS. And on the flip side, if you're a U.S. e-commerce store and you want to sell to 33 million Canadians, don't ship with UPS.

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