Understanding the importance of Daily battery monitoring to protect assets and improve uptime

1. 08/23/10 Worldwide excellence in battery monitoring >>

2. 08/23/10 What is battery monitoring Is a method to monitor rechargeable batteries By wikipedia Battery Monitoring is, The tools to verify a batteries ability to supply design current under rated load Battery facts >>

4. 08/23/10 Normal Conditions: 40 x 12 volt jars = 480V The vulnerability of a string >> Single Battery Failure: 40 x 12 volt jars = 0V 40 Jar Cabinet Contains 240 Individual Cells

9. 08/23/10 Differences In Monitoring Solutions Why you need Cellwatch >>

10. 08/23/10 Cellwatch Monitors… >> Daily Cell or Jar/Block Ohmic Value (low energy) Daily Cell or Jar/Block Voltage Discharge Current String Voltage Discharge Time String Currents Pilot Temperature Ambient Temperature

11. 08/23/10 Alber Monitors… >> Monthly Cell or Jar/Block Ohmic Value (low energy) Daily Cell or Jar/Block Voltage Discharge Current String Voltage Discharge Time String Currents Pilot Temperature Ambient Temperature

12. 08/23/10 Btech Monitors… >> Bi-Monthly Cell or Jar/Block Ohmic Value (low energy) Daily Cell or Jar/Block Voltage Discharge Current String Voltage Discharge Time String Currents Pilot Temperature Ambient Temperature

13. 08/23/10 PM Monitors… >> Quarterly Cell or Jar/Block Ohmic Value w/Cellcorder Quarterly Cell or Jar/Block Voltage NA……………..…Discharge Current UPS ………………String Voltage UPS ………………Discharge Time NA ………………..String Currents NA …………………Pilot Temperature NA …………………Ambient Temperature

14. 08/23/10 >> Let us say your monitor checked your batteries on the 1st of September The jar has fully failed on the 5 th . 4 days later Some monitors only recommend testing every 14 days in this case leaving the customer exposed with a failed battery for 9 days Some monitors even recommend testing only every 28 days in this case leaving the customer exposed to battery failure for a whole 23 days! Quarterly maintenance

16. 08/23/10 Why not Battery Monitoring? Why you don’t need Cellwatch >>

18. 08/23/10 >> Hourly costs of unplanned downtime Up to $50K 46% $50k to $250K 28% $251k to $1M 18% Over $1M 8%

19. 08/23/10 Still at risk of battery failure because you are not checking them daily. Up to 5% of batteries fail during the warranty period, 2-3 years Throwing away a high percentage of good batteries after 4 years Throwing away dollars, odds are better, but you are still betting Increased downtime, running on Generator, switching loads, increased opportunity for system failure Environmental issues caused (disposal) Expense of disposal Who’s watching it when the installers go home? “ I change my batteries every four years” >> Why you don’t need Cellwatch

20. 08/23/10 Servicing is better than no servicing but: Still at risk of battery failure because you are not checking them daily. Four times a year is not enough in today’s critical uptime environment Handheld testing is not as repeatable as Cellwatch Discharge tests, adverse effect on weak cells What happens when the service engineers go home? No real status on battery condition for 361 days out of 365. “ I have a battery service contract” >> Why you don’t need Cellwatch

21. 08/23/10 Still at risk of battery failure because you are not checking them daily. Does not give battery security unless it is used every day Best case…no real battery status for 25% of the time (assuming a test every month). Worst case…no real battery status for 92% of the time (assuming quarterly testing) Not as repeatable as Cellwatch Who is trending the data? Much more labor intensive Much more risk prone, safety issues (for the tester, the company and the battery) Long downtime is essential each time it is used “ I have a handheld tester” >> Why you don’t need Cellwatch

22. 08/23/10 Still at risk of battery failure because they won’t recommend daily testing of ohmic values. Cellwatch measures ohmic value daily and was specifically designed to do so Cellwatch pioneered ohmic measurements in 1996 and still leads the way Competitors “hit” their batteries with a much larger test load so have to recommend doing ohmic testing less often Some competitors do not measure ohmic value at all Cellwatch is the easiest, simplest and hence the quickest to install Large conduit and cable-tray considerations with these older systems. Competitors system constraints make a cluttered installation “ I always use another make of monitor” >> Why you don’t need Cellwatch

23. 08/23/10 Courtesy - C&D Technology Inc >> C & D batterie’s recommendations In the late 1990s, Johnson Controls, (now C&D Batteries), produced a very comprehensive set of literature on battery behavior. One of these is called: “Impedance and Conductance Testing” (Now referred to as Ohmic testing)

24. 08/23/10 Courtesy - C&D Technology Inc >> C & D batterie’s recommendations It also said that: “… actual values may vary +/-20% from value shown… The significance of values measured lies not so much in the specific value but how the value changes from its original value over a period of time.”

25. 08/23/10 This graph shows that with normal ageing these batteries have increased their ohmic value by 14% over 3 years (average) >>

26. 08/23/10 If we take 2.4mOhms as the start point, Cell 1 reaches an increase of 25% on May 30th Because Cellwatch measures daily Cell 1 is changed out immediately after the first alarm safeguarding the battery and the load!! >> Assuming the same delivery time to get a replacement cell, other monitoring systems could have left the customer exposed for much longer periods. Quarterly maintenance only could mean up to 119 days exposure!

27. 08/23/10 Manual testing vs. Cellwatch Only IEEE Cellwatch does not meet is the Visual Checks IEEE recommended maintenance (IEEE 1188) >> IEEE 1188 Manual System Cellwatch Monthly System Float Voltage, Charger current, Temperature and ventilation and visual checks Constantly (Not ventilation although temp can indicate failed AC) Not visual Quarterly Monthly checks plus – Cell / unit ohmic values, negative terminal temperature, interconnect resistance. Voltage every hour, ohmic once a day Semi-annual All monthly and quarterly plus – Voltage of each cell / unit Voltage every hour, ohmic once a day Yearly All the above plus cell to cell and interconnect resistance. Performance Test Voltage every hour, ohmic once a day. Any discharge gives a graph of voltage performance under load

28. 08/23/10 Cost justifications The value of Cellwatch >>

31. 08/23/10 Cellwatch systems are supporting critical loads in over 30 countries around the World There are no customers, operating Cellwatch who have had a “ dropped” load due to battery failure. The reason? Cellwatch is designed to monitor batteries for ohmic value DAILY Cellwatch allows full visibility of the TOTAL battery install (including the generator) High level of reliability is maintained by changing suspect cells well before a failure occurs Many Cellwatch systems pick up battery faults on install Allows 24/7 monitoring Gives REAL usable data of each cell or jar/bloc in the battery system Cellwatch around the World >>

32. 08/23/10 Daily monitoring of ohmic values Advanced optical technology CE & UL certified Continuous monitoring 24/7 Scalable system Fiber optic data highway Easy to install, u ser friendly software Measures: v oltage, ohmic value, current and temperature Actual on-battery indication of failed cell location Full d ischarge recording Remote monitoring facilities Web browsing, Email alert, SMS Cellwatch features >> y=m 1 x 1 + m 2 x 2 + b

33. 08/23/10 Eliminates costly downtime and disruption due to battery failure Daily surveillance of ohmic values, 24 x 7 watchdog Uses trending to highlight weakening cells prior to failure thereby predicting battery failure Optimizes battery assets by only replacing weak cells Full cell/bloc history allows validation of battery warranty claims Proactive versus reactive battery asset management The benefits of Cellwatch >>

34. 08/23/10 If its not everyday its not battery monitoring End presentation PTI Cellwatch >>