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Lol! Yes, I've definitely noticed a trend in the battery scene to really crank up the hype. Good entertainment though. What can't these things do? Just kidding, the Delta looks like a nice little unit- My personal Fave. Again, Bosh is kick ass and this pack probs is the best afaik...

Startups can go way over the rated power, like 10x and even 20x and beyond. I have a big lathe with a 25hp motor that normally draws around 40 amps. When my mains breaker blew out I put a recording ammeter on it and it showed the first ten or so seconds peaking between 250 and 350 amps. Had...

Very nice and thorough writeup. It's almost hard to believe that wind speeds that low can be captured and utilized. I have this overactive imagination perhaps, but I think it would be interesting to attach hydraulic arms to trees and convert the swaying motion into fluid power. No pesky...

There is a cat meme in here and I'm going to find it.

Hello, power hungry peeps. Glad to find this place/ it's quite a bustling ecosystem. My interest in off-grid kicked off around 2013 as far as concerted study but probably like a lot of people, the idea was floating around in my head since 2008 :rolleyes: I have a background in submersible...

Haha. I'm working out the calcs to see how many it will take. It will be interesting to see if there is enough room in the dump to hold the units and power it for the proverbial kw/h. EDIT, okay maybe my numbers got jumbled but here is what i'm looking at: Cat 797F @ 4000hp 4000*746watts =...

I just did a quick image search for "high current startup" or something along those lines. This site was in the mix: http://waterheatertimer.org/calculate-inrush-for-3-phase-motor.html

As far as your bank running the inverter, it is not going to care as long as the correct voltage range is maintained. Your 16 fortunes will put you 5.12kw hours (3.2 x 100 x 16). So 5Kw for one hour is 1C discharge rate. In a pinch they will go above that 1C discharge and easily exceed the...

Hi fellow battery power enthusiasts. New here, but I arrived with goodies. I thought people might find the inside of a Powerlab8 to be interesting. My electronics experience is pretty weak so I could not identify much of what is going on in the little beast [1000w 8s active balanced charging...

Yes, that will last you!. It's pretty hard to beat their stuff so you obviously did some homework. That mounting software that have is first rate as well.

Hello. When you mentioned your ebay battery problems I had to chuckle, sorry. Ebay is quite notorious for batteries in that regard. I learned that lesson too, but luckily it was only over a few dozen 18650s. Getting questionable batteries there should be like a right of passage or something...

I want one. Anyone notice one of the main retailers listing the 100Ah version for 124$ as sold out.....but they are offering them on ebay as "over ten available" at 168$ plus shipping? Priceless :ROFLMAO: Maybe there was some lag time in how the accounts are managed, so benefit of the doubt...

Since you went and doubled your budget ?, this might do unless that last five volts are a deal breaker DC55-55. I think I saw another version that was 80v 40a for under 1k$ as well, not sure if 1ph though.

I agree with all of these sentiments except that my preference is the exact opposite. I would rather ditch as much specialized battery/solar specific equipment as possible and have more generalized industrial/laboratory grade hardware. Much easier to re-purpose lab gear to do any number of...

For that kind of flexibility I have gone for the used Sorensens on ebay. I assume in the range you mention you are not intending to get 30a @ 60v? If so that might be a tall order in your price range. Used benchtops can be a gamble. I've purchased two; the first was bad, the second has given...

So true!

If you go high-end industrial, used, and get burned 50% of the time, you will still come out on top. All high-end is worth repair. It is also worth learning the gory details to handle issues on your own to save a buck. It's hard to justify taking the time to learn about electronics if it's...

Can anyone think of a reason to not run fuse wire to both connections on the top of the can rather than the traditional bottom end for the neg. terminal? This example is uncovered to show what I mean. Covers could easily block any chance of direct shorts. I'm thinking more in terms of cell...

Definitely no arguments. Just different strategies; one is efficient for a specific job, the other for general flexibility/reliability.

Yes, on the 220 pump issue there isn't any good way around that. And you definitely do not want to have an oopsie moment with a motor that is hundreds of feet down a hole! Def. gonna want to get a 220 inverter, not just for the pump but for plenty of other applications too. One thing you can...

Think of it like this, you probably are not loosing sleep over trying to maintain equipment assets while keeping Visa at bay o_O. Personally I live in a 20ft^2 corner of my shop just so I can play with bigger tools. I have to duck under a VMC console just to depart the loveseat I've been...

Hi Rich, EDIT I see you have already made a purchase so here is some food for thought in the future: Regarding pumps, whenever possible, do not go with an an unknown or cheap brand. There are so many things that can cause a pump to fail that the it is necessary to rule out bad design from the...

Liking that switch action. Bigger the better!

At that discounted price it seems reasonable. Those adjustable controllers on amazon you found look like they'd be fun to run with an arduino, too. But to have one integrated like that would sure save a lot of tinkering around, plus not needing a supply source. The quality issue is kind of...

I wish I had a better answer for you about parallel Sorensens. I know that some of them can be but not sure which ones. The thing with those units is that they are industrial quality gear, which is the only thing that I will buy used. The thing to do if you pick up a used supply like that is...

Regarding 1phase, that was my assumption based on the chart, showing 120v single phase at 74 amps (locked rotor). I think the website listed everything as 3ph, but 120v 3ph is not really a thing afik. Either way, single phase will draw the most current of the two scenarios.

You bring up a good point converting this problem over to watts. If the 120v AC locked rotor rating for a 3/4Hp motor is 74Amps, then that total power is going to be 8.8Kw. Now bringing this locked rotor power over to the DC end, you will be looking at 8.8Kw/48v or 8800/48 =183Amps. I didn't...