Apc Smart Ups Runtime Calculator
You can take your load and runtime (runtime = how much timeyou will have on battery) requirements and filter down from there based on yourother requirements (outlets, UPS topology, voltage, frequency, input cord,etc). You can use tools like ouror similar tools from other vendors if you want to take the DIY approach to UPSsizing.
If you like the DIY approach and want to research further on your own,check out this and thiswhitepaper too. We also have a that can help with this process in many cases. Although in thiscase, on most of the calculators I have seen, the T430 is either listed at 1100watts (which is the largest power supply for it) or not listed at all.Alternatively, you can bounce your requirements off of ourapplication engineers & they can put together a few possible solutions foryou to pick from (p.m. And I can set up an intro, or you can fill out thecontact form ).This is an easy & free way to offload some of the work and get expertinput.Diving into the specifics here, if you take the mostconservative approach of sizing to the power supply, you are at 4500 watts (youprobably won’t ever actually hit this number). As others have mentioned, aserver will usually not draw the full capacity of the power supply.
Some usethe rule of thumb to multiply the power supply size by 0.7 to avoid oversizing(and over paying), or you can drill down and confirm the actual max power drawfor the server. I’ll run with the conservative number of 4500 watts/750 watts perserver here, but we can drill down and better quantify that number to make sureyou don’t end up oversizing. At 4500 watts, you could likely get away with an efficient5KVA UPS here, you’d be close to 100% load.
For reference, I like to tellpeople to load the UPS between 60-80%, I think that strikes a good balancebetween actually utilizing the capacity you pay for, and leaving some “wiggleroom” for new load to be added and upticks in usage. Given that, if you want toput everything on 1 UPS, you’d be looking at something like theplus a PDU to give you the outlets you need.Alternatively, you could go the route of splitting the loadacross smaller UPS systems. This would open the door to 120 volt UPS options,and theoretically eliminate single points of failure.
For servers like this, Igenerally encourage people to go the online UPS route, but once you are in thatlower capacity range, some lower cost line interactive units become feasibletoo.You’d then need to answer the question: how much time do I needthings to stay on when the lights go out? And add batteries if appropriate. Forexample, if we take the conservative approach to sizing the load (4500 watts,again I don’t think you’ll ever actually hit that number) and use theSU6000RT4UHV, you’d have 3 minutes of run time with the included batteries, butcould bump that up to 21 minutes by adding a.One of the nicer tools on our site are the runtime tables for a given UPS thatlet you see what adding batteries gets you at a given load. What will probably drive how much you need toinvest in batteries is: do you need the UPS to stay on just long enough for agenerator to kick in or will you need it to support the load on its own for awhile?Side note: I’d encourage you to consider adding UPS backupon both of the power supplies if at all possible given your budget.I hope this helps.
A lot of the specifics will come down to what you have to work with as far as budget, electrical service, outlets, etc, so if you have the time to speak with an application engineer, ping me and I'll get something set up.You might actually want to try this across a few vendors if this is yourfirst time sizing a UPS. That's a maximum number.
You can't go beyond that, and really that's a.total. power usage, including power used in the conversion process. So if you have an 80% efficient 600W PSU, it can pull up to 600W, of which 480W are available to the motherboard and peripherals on the various voltage rails (12v, 5v, 3.3, etc).If your computer is mostly idle, it probably won't pull more than 100w for a modern desktop. Video cards and CPUs are the biggest power drains in the system, usually in that order, and they're good at scaling with usage.
Modern GPUs (NVidia 10xx and probably the 9xx series) can be requested to run at a certain power draw and scale performance according to that number. Or they can be requested to scale according to a temperature profile. For example, I run a mining rig and I can ask it to keep the GPU below 70C, and it will run as fast as possible while keeping the GPU under that temp. CPUs for a while now have had throttling and boosting to stay within a temperature profile. APC has a good UPS selector. If you don't want APC, you can at least figure out what model of theirs is most suitable and pick a competing brand with the same ratings.I would recommend two separate UPS units - one for each power supply.For some reason it won't let me proceed when I dump your servers into the configurator.
And, it seems to want to throw you immediately into the monster datacenter UPS units when I try other methods of using it. An off day at their site maybe?What kind of budget do you have (ballpark figures), and what is the minimum runtime you are seeking?Edited Oct 18, 2018 at 20:40 UTC. When determining what capacity the UPS needs to have when it’sgoing to backup equipment with redundant power supplies, the number of powersupplies in the redundancy scheme is not a contributing factor. The total numberof watts that the PSU is rated for is the only one that needs to be considered.What does need to be taken into account is the number of outlets available onthe UPS so that it matches with the number of power cords needed to connect tothe server(s). Although you’re only considering 1xPSU for the UPS capacity, youneed to count 2xPower cords, 1 for each PSU. A PDU may be needed to distributethe UPS power to add more outlets than when what the UPS has.To figure out the correct UPS I would need to know some moreinformation.
For example what available outlets do you have to plug the UPS into?For example you have 6 (servers) x750w (PSU) = 4500 watts. If you have a 208Vsystem available a CyberPower OL6KRT UPS will cover your total wattage. If youonly have 120V system left then the amount of UPS’s will depend on the amperageyou have available in your server room.
For example if you have a 15A system availablethen you would need Qty 3 PR1500LCDRTXL2U to cover the total wattage. If youhave a 20A system then Qty 3 PR2200LCDRTXL2U, but you will have some sparecapacity if you want to add some more equipment. If you have a 30A system availablethen you would need qty 2 PR3000LCDRTXL2U to cover the total wattage. So it comesdown to what you have available in plug your UPS’s into as to qty you willneed. Sorry this is so long I just wanted to make sure you had all the info. Ifyou would like some more help choosing a UPS or have any questions feel free tomessage me. Personally, if I have a way to measure actual power draw, I totally ignore PSU ratings.
It's entirely possible to have a system with a 750W PSU that will never draw more than 300W under worst case full load conditions. The important thing is to measure peak draw, not just typical running draw. And then add a 20% buffer (or more if desired, depending on planned future growth).That should give you plenty of power capacity without ending up with a massively oversized system that's never above 25% load, just because the power supplies in your servers are bigger than they need to be. Find businesses for sale. Here is a runtime chart for Smart-UPS. You may need something of a higher product line, though. I can never find these charts by browsing their site - I just randomly found it.It would be great if someone from APC or a similar vendor can chime in (and correct me if I am wrong), but I think you need to make sure that whatever you pick can handle the load equivalent to 4500 W (which is the max power draw of 1 power supply from each server), and have a redundant UPS for the redundant power supplies. If you plug both of your redundant power supplies into the same UPS, then your server goes down if you shut down your UPS by mistake, or the UPS dies.Runtime is going to be based on your actual normal power draw, which may be more like 1000 W, maybe more or less.
Also, your redundant power supplies likely don't draw the same amount of power - one could sort of be in a standby mode. The vendors should be able to direct you to the appropriate charts for the product lines you should be looking at.If going with APC, and the SmartUPS are not beefy enough to go with 2 units because they cannot support the load, then you could go with 4 units and have 3 servers connected to 1 redundant pair of UPS's and the other 3 to the other redundant pair of UPS'sMaybe the really beefy UPS units do something better that I don't know about that makes them more cost effective, but they have always been outside of my budget. Hi Eli,If you can determine the actual power draw of the servers, that is always the best way to calculate UPS needs. I checked Dell's website and the power consumption they list for this server is higher than the power supplies you listed, so I suspect that is based on a higher wattage power supply than you have.
Without the actual power consumption, using the power supply rating would be the next best option as this ensures the UPS can handle the maximum draw of the servers. It also would be helpful to know what plug types you need as well as whether you prefer rack mount or stand alone tower style UPS units. Based on a maximum power draw of 4500 watts, the best UPS solution for at least 10 minutes of run time would be our Smart-UPS SRT 6000VA with 208/240V to 120V Step-Down Transformer (APC model number SRT6KXLT-5KTF) and one SRT192BP Battery Unit. The SRT6KXLT-5KTF would be at approximately 75% of its capacity and with the externalSRT192BP Battery Unit you would receive approximately 21 minutes of runtime. I have linked theSRT6KXLT-5KTF) and SRT192BP Battery Unit below for you:Please be aware that theSRT6KXLT-5KTF requires a 208 volt 50 AMP dedicated circuit for your electrician to hard wire the input. There is an included step-down transformer to provide 120 to your devices.
There is not a plug option for this UPS model as any UPS 6KVA or higher must be hardwired on the input.Please let me know if you have any additional questions I can assist you with.PatriciaEdited Oct 19, 2018 at 13:29 UTC. You can take your load and runtime (runtime = how much timeyou will have on battery) requirements and filter down from there based on yourother requirements (outlets, UPS topology, voltage, frequency, input cord,etc). You can use tools like ouror similar tools from other vendors if you want to take the DIY approach to UPSsizing.
If you like the DIY approach and want to research further on your own,check out this and thiswhitepaper too. We also have a that can help with this process in many cases. Although in thiscase, on most of the calculators I have seen, the T430 is either listed at 1100watts (which is the largest power supply for it) or not listed at all.Alternatively, you can bounce your requirements off of ourapplication engineers & they can put together a few possible solutions foryou to pick from (p.m. And I can set up an intro, or you can fill out thecontact form ).This is an easy & free way to offload some of the work and get expertinput.Diving into the specifics here, if you take the mostconservative approach of sizing to the power supply, you are at 4500 watts (youprobably won’t ever actually hit this number). As others have mentioned, aserver will usually not draw the full capacity of the power supply. Some usethe rule of thumb to multiply the power supply size by 0.7 to avoid oversizing(and over paying), or you can drill down and confirm the actual max power drawfor the server.
I’ll run with the conservative number of 4500 watts/750 watts perserver here, but we can drill down and better quantify that number to make sureyou don’t end up oversizing. At 4500 watts, you could likely get away with an efficient5KVA UPS here, you’d be close to 100% load. For reference, I like to tellpeople to load the UPS between 60-80%, I think that strikes a good balancebetween actually utilizing the capacity you pay for, and leaving some “wiggleroom” for new load to be added and upticks in usage. Given that, if you want toput everything on 1 UPS, you’d be looking at something like theplus a PDU to give you the outlets you need.Alternatively, you could go the route of splitting the loadacross smaller UPS systems. This would open the door to 120 volt UPS options,and theoretically eliminate single points of failure. For servers like this, Igenerally encourage people to go the online UPS route, but once you are in thatlower capacity range, some lower cost line interactive units become feasibletoo.You’d then need to answer the question: how much time do I needthings to stay on when the lights go out?
And add batteries if appropriate. Forexample, if we take the conservative approach to sizing the load (4500 watts,again I don’t think you’ll ever actually hit that number) and use theSU6000RT4UHV, you’d have 3 minutes of run time with the included batteries, butcould bump that up to 21 minutes by adding a.One of the nicer tools on our site are the runtime tables for a given UPS thatlet you see what adding batteries gets you at a given load. What will probably drive how much you need toinvest in batteries is: do you need the UPS to stay on just long enough for agenerator to kick in or will you need it to support the load on its own for awhile?Side note: I’d encourage you to consider adding UPS backupon both of the power supplies if at all possible given your budget.I hope this helps. A lot of the specifics will come down to what you have to work with as far as budget, electrical service, outlets, etc, so if you have the time to speak with an application engineer, ping me and I'll get something set up.You might actually want to try this across a few vendors if this is yourfirst time sizing a UPS. Hey Eli,Good comments from the vendors above.
As you can see we all have selectors and sizing calculators, Eaton actually has UPS selectors to address different regions like. If you are in Isreal, I'd assume you be looking at a 230V model with C13/C14 connections.Picking the load after that is a bit of pseudo science that largely depends on how you are utilizing the available computing power of your servers. I tend to side with David @ Tripp Lite to estimate about 70%.
I usually see servers using less than 70% therefore this method still has a conservative aspect to it.QUICK TIP: The PowerEdge supplies are redundant and will share the power equally. So if you have an existing UPS with the second power supply plugged directly to utility, then your total power draw on the UPS during a power outage will be twice what you see on the single UPS when the power is on.
That might help you bypass all the estimation uncertainty. Elibrody wrote:Another thing I am having a hard time to calculate is - how do I know how long would a UPS hold while a power outage?For example in the discussed scenario when my servers’ total conservative number would be 4500 watts (750 watts per server),What kind of uptime would a get from a 3,900VA - 3,900 watts UPS?The amount of runtime is going to be determined by the capacity of the battery system connected to a UPS and the amount of load the UPS is supporting. Many UPSes in the range you are looking at come with internal batteries plus the option to add additional external batteries. In short, at any given load the UPS can support, more batteries = more runtime.While we could dive into the math on calculating the amp hours of a given battery pack and how much runtime it would give you at a given load, many vendors will already have charts and tools that provide the estimates for you. For example, if you're looking at a Tripp Lite UPS on our website, there is a 'view runtimes' button you could press to play around with the numbers. Here is an example for thewhich is a 6000VA/5400 watt UPS:With our you can also put in load and runtime requirements along with other requirements to filter for options as well. Hi Eli,Unfortunately, we do not manufacture a 3900 Watt or 3900 VA unit.
None of our UPS units that are single phase would be unity power factor. Only some of our three phase solutions are unity power factor like David mentioned. The closest unit to 3900 watts sold in Israel would be our Smart-UPS Online 5000 VA unit, APC part numberSRT5KRMXLI. For a load of 3900 watts, theSRT5KRMXLI would provide approximately 5 minutes of run time. I have linked theSRT5KRMXLI and theSRT5KRMXLI run time chart below for you:The international version of the Smart-UPS RT 6000 I had mentioned previously would be the SRT6KXLI. The SRT6KXLI at 3900 watts load would also provide 5 minutes of run time. I have linked theSRT6KXLI and theSRT6KXLI run time chart below for you to review:Please let me know if you have any additional questions.Patricia.
Apc Ups Calculator
When I did it, first step was recording the Amp spec on each device. Then add that up for a worse case scenario, all the while knowing that in real life it will likely be half that or less.Next step is determining how long do I want to support those devices. Amps x hours equal Amp Hours. This tells you how many batteries you'll want on hand.By calculating using the worse case Amp numbers this helps compensate for how the batteries will diminish in their ability to keep things running over time.
With ESXi you install a vMA machine, which lets you run scripts on the hosts (I haven't used ESX, but I understand it had this built in). Install PCNS on it, point it to the hosts and the battery/batteries, and you're off. In an outage, it'll shutdown the virtual machines, then the host. Each of my ESXi hosts have two power supplies, so there's a UPS for each - PCNS handles it well.If you use APC, I'd definitely suggest the network management cards - they're fantastic, and much easier to use than USB (I don't think it'd work with USB anyway). One of my NMC's has environmental monitoring so I can also shutdown in response to heat or humidity.
LegoMan wrote:You can do math, but it's not reliable due to battery age, inverter inefficiencies, and possible other loads. Unplug the UPS, start a stopwatch until it's dead, marking the runtime/battery voltage as it goes down - that's a true indication. Then, I'd subtract 5 to 10% of that, cause as the batteries get older, it's only going to get worse runtime.APC PowerChute software would be able to tell you battery voltage and remaining runtime, but again, I never trust the latter number as accurate.For obvious reasons I want it to be reliable, but this and the post from Ross got me thinking: should the webinterface not host that kind of info too??I'll have a look at that over the weekend.
If you are connecting a UPS to an ESX server you should be connecting via a network connection and monitored thru your vCenter Server and using the virtualization software from APC. This software along with the regular powerchute software will show the approx. Runtime and you can schedule the UPS to initiate the auto shutdown when it reaches a certain point.to determine the runtime based on look up the UPS on the APC website and it will show you a runtime chart and you can figure out from there the runtime based on the load.for example a SMT2200RM2U with a 300W load will run approx.
58 minutes when new. This time will shorten as the UPS gets older. Robert3914 wrote:If you are connecting a UPS to an ESX server you should be connecting via a network connection and monitored thru your vCenter Server and using the virtualization software from APC. This software along with the regular powerchute software will show the approx.
Apc Smart Ups Price
Runtime and you can schedule the UPS to initiate the auto shutdown when it reaches a certain point.It is directly connected to an ESXi server and the network, so I'll have a look at your suggestion.The idea just hit me a couple of days a go, so I haven't spent much time thinking about the details just yet.