On Thu, 01 Feb 2024 10:18:24 -0500, micky wrote:
> People don't use 100W light bults anymore, but 88WH wouldn't power a
> 100W light bulb for even one hour. Still it might be enough, BUT...
The point is it's about the same capacity as a single DeWalt 20VDC battery.
Except that it doesn't require a charger (which the DeWalt battery needs).
Plus it runs all your power tools without having to buy special portables.
> See how much the tool(s) you want ot use uses, in watts. and estimate
> how long you'd want to use it in, say, a day, on the theory you could
> recharge this power supply overnight, in 8 or 12 hours.
I looked up "how many watts does a drill use" and found this to tell me.
https://wattalot.com/drill-wattage
"The average corded drill uses between 500 to 1500 watts"
To compare, I looked up "how many watts does a cordless drill use".
https://www.toolsadvisor.org/how-many-watts-does-a-cordless-drill-use/
"A cordless drill can use anywhere from 300 to 1200 watts"
> 30 years ago, they were selling a converter, that would turn 12 volts
> from the car into 110VAC, and it was only $10 and I thought, What a
> deal. So I got it and later that year I had to drill a hole in a chain
> link fence post cap a mile from my house and several hundred feet from
> someone else's house, someone I didn't know anyhow. So I drove over,
> tickled to use my new converter which I'd bought without any project in
> mind, connected the converter and the drill, and started to drill, and
> it did almost nothing or maybe nothing. Only then did I look at what
> the drill used. It was a lot more than I'd figured, and the power
> supply wasn't nearly big enough.
The corded drill is almost always going to be the better tool in almost
every way than the cordless because of the compromises a cordless needs.
The main difference is one needs you to deal with the cord but the other
needs you to deal with a corded battery charger (so both require cords).
The main advantage of the cordless is small size & greater portability.
But that's the whole point of a small inverter of the same capacity.
> And that was to run at all, not to run 5, 10, or 20 minutes that some
> projects take. Your ps above has an output of 120 watts, probably a
> lot more than my converter, but I have a terrible memory for numbers so
> I'm not at all sure, and if so it will run my drill when my converter
> wouldn't, but for how long. If it the drill takes 180watts, that would
> only be 30 minutes, and that assumes one can drain the batteries all the
> way. Is that allowed, does it still have 110v at the end?
I ran this calculator for a 1000 watt drill and an 88 Watt hour inverter.
https://www.omnicalculator.com/physics/watt-hours
Unfortunately 88 watt hours will only run a 1KW tool for 5.28 minutes.
Even though drilling is about 10 or 20 seconds, that might not be enough.
But lots of portable 8 pound 120VAC power stations are around 300 Watts.
https://www.amazon.com/Duracell-Portable-Power-Station-Parent/dp/B0CDCM6H1C
If I buy a 300 Watt Hour station, the 1KW time jumps to 18 minutes of use.
But once the battery gets heavier than about 10 pounds, it becomes too big.
https://www.cnet.com/home/energy-and-utilities/best-portable-power-stations/
> At any rate, I found that the pole cap came right off so I took it home
> and drilled my hole there.
>
> BTW, a question we should always ask but don't always. What are you
> trying to do with this setup. Where is the project? What is the
> project?
I almost never need a power tool outside the home, but sometimes I do.
For that, I could buy a set of DeWalt battery operated power tools.
Plus a set of batteries. Plus a charger. All of which are expensive.
Or I could buy only the 120VAC battery - which is also expensive.
It's a tradeoff. One is more versatile. The other is more portable.
But each also has shortcomings. Like size. And capacity.
That's the conundrum.
> Camping? Radio (radios use very little. At least I assume they do
> because they have radios with decent volume that will play for hours on
> a little 9v battery.) AC uses the most, but people don't take them
> tent or cabin camping. After that, heaters use the most; motors are in
> between; and radios and phones and now probalby lights (because they are
> LED) use the least. IIRC.
For camping, I'd probably buy the wheeled 120VAC batteries such as the
GoalZero Yeti 1500X (which I've been pining for waiting for a sale).
https://www.familyhandyman.com/article/power-station-review-goalzero-yeti-1500x/
But that one (which they tested charging & running DeWalt tools) is 45
pounds which is more than double what I'd want to lug around at home.