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Rework a UPS with Massive Capacity
Sweet! LMK if you have any questions.
Hey, this is a student, and this is a life saver. I was chosen as a god at my school (which only like 10 people are out of 140 students) for a big greek mythological party and competition. I was chosen as Hermes and am sooooo happy that there is a DIY for this. You have no idea how little of DIY's there are for Hermes.Thanks :)
Erm... in general if you place batteries in series, the voltage is additive. If you place them in parallel, the available amperage is additive.So two 12V batteries in parallel would not be 24V - bobkoure
Yes, tThe two batteries in the photo are in series. In the case of the UPS in the photo, you would need two 12V batteries and these external/additional batteries MUST be in series as a set and and the set must connected to the existing batteries in parallel at the red and the black wires.Alternately, you can connect each individual extra battery to each of the internal batteries in parallel, but that would mean extra connections. - PaulR236
I partially disagree here. BEcause of the way permissions are grouped, many apps seem to wany access to things that are not intuitive. I choked on giving Pokemon Go access to Contacts, and still have not come up with a reason why it would need that, though. However, you cannot know from the poermissions whether or not an app is a Security threat. I think what you're trying to say is that they are a PRIVACY threat. Yes, you're constantly giving up your position in real time. But other players (so far) don't have access to that information. So it can't be used to stalk you or harrass you. I've heard rumors about person-to-person interaction, like trading, coming out in the future, but the current game doesn't do that. Ingress, also by Niantic (as spinn-out from Google), DOES make it possible to track other players. Some user have built apps used by both sides that scrape the log and build maps of where other players are. They cannot track you constantly, only certain actions like destroying / capturing portals and linking / fielding portals.There are certainly things to give on pause, but I haven't seen anything that's a true security risk.
Yes, all Pokestops are portals in Ingress (I've been playing Ingress for about a year and a half). However, not all Ingress portals are Pokestops. If you sign up for Ingress (choose the Resistance faction!), you get access to the intel map which allows you to see the portals anywhere without going there. It appears that about 75% of Ingress portals are also Pokestops. You can play both games at the same time, but I keep Pokemon open to hatch eggs as I walk. If you go to your app store, Ingress will show up as a suggested app with Pokemon Go.I've found that Ingress still works just fine when Pokemon isn't. Just a more mature codebase and probably fewer server issues as well due to heavy loads.
The terms of service note that people should not trespass, etc. People are getting escorted out of cemeteries because they are violating the posted open hours. It's usually fairly easy to find out what those hours are. If you cannot find a sign, look up the location online. Most cemeteries are dusk to dawn, though some are 24/7. Sometimes the hours shown on a website are the office hours, not the cemetery visiting hours. And then you'll fimd some police officers who just don't like the idea of people playing a game in a cemetery: they claim it's disrespectful and harrass people. To be fair, I've found that police officers are VERY polite if you are polite to them and don't try to make their job more difficult than it already is with every night being National Night Out now (because of PG).Not all portals that were submitted and approved in Ingress meet the criteria. Even though invalid portal requests were submitted, Not all were removed, and there are some in the wrong place because some Ingress players on either faction voted them up to give their own player(s) a "couch" portal or "work" portal. Niatic is no longer accepting portal submissions in Ingress, but you can still submit invalid portal reports. I don't see a way to do this in PG.
Nice instructable; I have a similar setup to run some critical lights. Keep in mind that many UPS's are not designed to run as an inverter for long durations (not more than a few minutes) and will get hot. Depending on the quality your UPS you may need to install a small fan to keep things cool. Also for all battery systems, there is a general rule of thumb that the charge and discharge rate in amps should be between 5-13% (ideally 10%) of the capacity of the battery bank to prevent the batteries from over heating. A typical UPS may only be able to charge the batteries at 1-2 amps, so if you have 200AH battery bank you would want to charge at a rate of at least 10amps preferably 20amps. Never the less, very good post, this is a good way for people to economically get started with extended power backup times.
If you haven't solved this problem yet, an inverter/charger like this http://goo.gl/y5c1A6 is probably a better solution for you.
You could use 2 DC-DC converters, one step down from 24-12 and one step-up from 12-24. Then connect 2 diodes (one for each converter in opposite directions) to prevent getting a circular looping circuit. However this is not something I would do. If your UPS is designed to run on 24v, that also means it's charging algorithm is designed for 24v. A DC-DC converter and a diode would change the voltage across the circuit enough to cause significant problems. Better to connect two batteries.
Would be nice to see how your set up runs, I have a similar setup. I actually got rid of all my AC-DC adapters for my modem, routers, switchers and access points, and run them on pure DC straight from the battery (through a solar charge controller so that I can benefit from the low voltage disconnect). From a 100AH 12v battery (1.2KWh) I get 3 days no problems. Under normal conditions your battery voltage would range between 11.8v and 13.6v (stable open circuit voltage). Most DC circuits would be able to handle the extra voltage as it would jsut be dissipated as heat. My current network switchers are all 9v but I run then on a 12v line. They run a bit hotter than normal, but they run just fine. To this same battery I have connected a UPS (diode connected to prevent UPS from charging battery) to power critical lights in a power outage, and I run a 120W solar panel to keep the battery topped up (during extended bad weather my panel doesn't provide charge, but the battery still lasts about 3 days for my small load)
It will just last longer. You will need a UPS capable of delivering more amps than the APC350
My current ups uses 2 gel batteries in a parallel connection, so thats 24volts. i want to know if i can rewire the ups so that i could use one 12v, 100amp battery instead.any ideas if its possible would be appreciated.
Why not connect the extra batteries with the original ups batteries in parallel if the voltage is the same?
I am trying to get a backup for my garage door openers. A stock APC350 will not run the garage door, I am guessing not enough amps coming through? If I put a larger battery will it have a higher amperage output, or will it just last longer. I guess the question is does the circuitry limit the output?
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