Horse Sense #147
Better Power for Less Money
Learn how to make a conventional spinning hard drive as fast as a solid state drive using Intel Optane cache memory: https://www.youtube.com/watch?v=T2KpmpFgnUI (14 minutes) The video shows a 4TB hard drive with Optane cache outperforming a solid state drive._______________________________________________
Better Power for Less Money
VRLA (valve-regulated lead-acid, also known as sealed lead-acid (SLA) or maintenance free) batteries are the standard for battery backup applications like those used in alarm systems, phone systems, and Uninterruptible Power Supplies (UPSs). Because the price of Lithium-ion (Li-ion) technology has decreased over the years, older VRLA batteries are being replaced by Li-ion models like those used in electric cars, laptops, and cell phones. Despite the fact that they initially cost more, the 10 year total cost of ownership (TCO) comparison shows Li-ion UPSs are 53% less than VRLA models because the Li-ion batteries last much longer.
Li-ion batteries have a couple of drawbacks:
(1) They cost more for a similar capacity battery.
(2) They use more costly and sophisticated charge/discharge circuitry
(3) They are subject to stricter transportation regulations.
The benefits outweigh the drawbacks:
(1) Li-ion batteries require fewer replacements over the lifetime of the UPS, which amounts to less downtime.
(2) Battery warranties may be up to 10 years, versus 1-3 years for VRLA.
(3) Li-ion batteries can be charged and discharged 10 times more than VRLA batteries.
(4) Self discharge (discharge while not in use) is four times less.
(5) Li-ion batteries charge four times faster than VRLAs, which can be valuable if the wall power keeps going on and off.
(6) Li-ion batteries withstand heat better. High temperatures significantly degrade the lifetime of a VRLA battery but do not bother a Li-ion model.
(7) Li-ion batteries are a lot lighter. It makes handling them, or the UPSs that contain them, a lot easier on the back.
(8) Because they store more energy per volume, they can also be made smaller than VRLA batteries.
(9) Li-ion is more environmentally friendly technology. Spent Li-ion batteries are not hazardous waste and can be thrown in landfills. VRLA batteries contain toxic lead.
(10) Taking 1-9 above into account, over the life of the battery in a UPS, you save time and lots of money with Li-ion technology.
There are few UPS vendors using Li-ion technology at the moment, but as people learn more about Li-ion, the number will increase. American Power Conversion (APC) makes a few UPS models, and you can learn more about their offerings here: https://www.apc.com/us/en/campaign/lithium-ion-ups.jsp Then, of course, then you should call us!
©2019 Tony Stirk, Iron Horse email@example.com