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1. Victron Energy has established an international reputation as a leading designer and manufacturer of energy systems Our R amp D department is the driving force behind this reputation It is continually seeking new ways of incorporating the latest technology in our products Each step forward results in value added technical and economical features Our proven philosophy has resulted in a full range of state of the art equipment for the supply of electrical power All our equipment meets the most stringent requirements Victron Energy energy systems provide you with high quality AC supplies at places where there are no permanent sources of mains power An automatic stand alone power system can be created with a configuration comprising of a Victron Energy inverter battery charger and last but not least batteries with sufficient capacity Our equipment is suitable for countless situations in the field on ships or other places where a mobile 230 Voltac power supply is indispensable Victron Energy has the ideal power source for all kinds of electrical appliances used for household technical and industrial purposes including instruments susceptible to interference All of these applications require a high quality power supply in order to function properly Victron Energy batterymonitor This manual describes the functionality and operation of the BMV 501 including its protective devices and other technical features victron energy2. log 20 log8 5 Peukert exponentn 1 23 log 20 log10 To calculate the Peukert exponent with the specifications above you can also use the Peukert calculator which can be downloaded from our website at www victronenergy com or is part of the optional PC link interface kit software see page 23 for article number victron energy Oy 2 4 Charged parameters Based on increasing charge voltage and decreasing charge current a decision can be made whether the battery is fully charged or not When the battery voltage is above a certain level during a predefined period while the charge current is below a certain level for the same period the battery can be considered fully charged These voltage and current levels as well as the predefined period are called charged parameters In general for a 12V lead acid battery the voltage charged parameter is 13 2V and the current charged parameter is 2 0 of the total battery capacity e g 4A with a 200Ah battery A charged parameter time of 4 minutes is sufficient for most battery systems Please note that these parameters are very important for correct operation of your BMV 501 and must be set appropriately in the corresponding Functions 2 5 Synchronizing the BMV 501 For a reliable readout of the state of charge of the battery the battery monitor has to be synchronized regularly with battery and charger This is accomplished by fully charging the battery When the charger is operat
3. temperature Reading state of charge is the best way to read your battery This parameter is given in percent where 100 0 represents a fully charged battery and 0 0 a completely flat battery You can compare this with a fuel gauge in a car victron energy Oy The BMV 501 also makes an estimation of the time the battery can support the present load time to go readout This is actually the time left till the battery needs to be charged again If the battery load is fluctuating heavily it s best not to rely on this reading too much since it is a momentary readout and must be used as a guide only We always encourage the use of the state of charge readout for accurate battery monitoring Besides the main function of the BMV 501 displaying the actual battery status this monitor offers many other features The readout of actual battery voltage current and temperature with optional temperature sensor the ability to store historic data the PC computer link and the Super lock function are just a few features of the BMV 501 These features are more specifically explained in the corresponding chapters of this manual victron energy Oy 2 SETTING UP THE BMV 501 Before proceeding with this chapter please make sure your BMV 501 is fully installed in accordance with to the enclosed installation guide When your BMV 501 is installed it is time to adjust the battery monitor to your battery system But before discussing the functions in
4. the setup menu four important items are explained first in the following chapters It is important that as a user of the BMV 501 you have having some insight into these four items The actual setup menu functions are explained in chapter 2 5 Function overview 2 1 Precautions when working with batteries Working in vicinity of a lead acid battery is dangerous Batteries can generate explosive gases during operation Never smoke or allow a spark or flame in the vicinity of a battery Provide sufficient ventilation around the battery Wear eye and clothing protection Avoid touching CAUTION eyes while working near batteries Wash your hands when done If battery acid contacts skin or clothing wash immediately with soap and water If acid enters eye immediately flood eye with running cold water for at least 15 minutes and get medical attention immediately Be careful when using metal tools in vicinity of batteries Dropping a metal tool onto a battery might cause a short circuit battery and possibly an explosion Remove personal metal items such as rings bracelets necklaces and watches when working with a battery A battery can produce a short circuit current high enough to melt a ring or the like to metal causing severe burns victron energy Oy 2 2 Charge Efficiency Factor CEF Not all energy transferred into the battery during battery charging is available during discharge of the battery The charge e
5. 2 F03 FO7 and F08 should be sufficient victron energy Oy Battery capacity in Amphours Ah This must be the capacity at a 20h discharge rate and 20 C Default 200Ah Range 20 2000Ah Stepsize 1Ah Voltage charged parameter The battery voltage must be above this voltage level to consider the battery as fully charged Make sure the voltage charged parameter is always slightly below the voltage at which the charger finishes charging the battery usually 0 1V or 0 2V below the float stage voltage of the charger Default 13 2V Range 8 0 33 0V Stepsize 0 1V Current charged parameter When the charge current value is below this percentage of the battery capacity see F01 the battery can be considered as fully charged Make sure the current charged parameter is always greater than the minimum current at which the charger maintains the battery or stops charging Default 2 0 Range 0 5 10 0 Stepsize 0 5 Charged parameter time This is the time the charged parameters as described in F02 and F03 must be met in order to consider the battery as fully charged Default 4 minutes Range 1 4 minutes Stepsize 1 minutes Low battery alarm ON discharge floor When the state of charge percentage has fallen below this value the alarm relay will be activated and the CHARGE BATTERY indication will flash on the display to indicate the battery must be charged The time to go calculation is al
6. Oy TABLE OF CONTENTS 1 BATTERY MONITOR BASICS 2 2 2 2 2 2 6 1 1 Why should monitor my battery 2 2 6 1 2 How does the BMV 501 work aaa aaa 6 2 SETTING UP THE BMV 501 0 carr oda eh ea hy e 8 2 1 Precautions when working with batteries 8 2 2 Charge Efficiency Factor CEF 2 9 2 3 Peukert s exponent en 9 2 4 Charged parameters o a 11 2 5 Synchronizing the BMV 501 2 2 2 2 2 11 2 6 Function overview 2 12 3 GENERAL OPERATIONS de 00 meae aen ee e kA 17 4 ADVANCED FEATURES amp 9 4 ds et eke 19 4 1 Historic data AA E ee Gr a 19 Ase PGM ek e d ee der nde Ge ee 19 AS Super lock Tran E A te ER a 20 5 TROUBLESHOOTING GUIDE 2 2 2 2 2 2 20 al Waranty 200 Sk te fee AAA 22 6 TECHNICAL DAT Awa nete emoe do de ge de ek ee pace se 22 6 1 Declaration of conformity 2 2 2 2 42 24 victron energy Oy 1 BATTERY MONITOR BASICS 1 1 Why should monitor my battery Batteries are used in a wide variety of applications mostly to store energy for later use But how do you know how much energy is stored in your battery No one can tell by just looking at it Battery technology is often oversimplified but some basic battery knowledge and good monitoring is essential if you want to enjoy maximum life from your expensive batteries The life time of batteries is dependent on many factors Battery life reduces by under c
7. ay With the lt and gt selection keys the value of HO1 can be displayed By pressing the SETUP next key the next history event in this case HOZ can be selected To jump back to normal operating mode all three BMV 501 keys must be pressed for five seconds again 42 PC link Each BMV 501 offers the possibility to communicate with a Personal Computer However the optional external communications interface kit is required for this feature This communications interface only needs to be connected when actually communicating with the BMV 501 to avoid unnecessary power consumption With the dedicated BMV 501 Windows 95 98 ME 2000 XP software the user can simultaneously display all victron energy Oy parameters The BMV 501 can also be fully programmed via this link while the complete Function setup can be saved to disk Furthermore historic data can be readout the BMV 501 can be tested and the super lock can be de activated 4 3 Super lock With the super lock feature the setup menu of the BMV 501 can be completely locked and secured by a password In super lock mode the historic data cannot be erased either The normal operating mode is not affected by the super lock and the Functions in the setup menu can be reviewed but not altered Only the user installer knowing the password can unlock the BMV 501 via the PC link The super lock must not be confused with the setup lock Function F20 The big difference between the
8. d Default 30 seconds Range OFF 10 60 0N AU Stepsize 10 seconds Default Firmware version Displays the firmware version of the BMV 501 No alterations can be made Default 1 00 Setup lock When this Function is ON all functions except this one are locked and can t be altered Default OFF Range OFF ON When all the necessary changes are made and double checked in the setup mode it is time to jump back to the normal operating mode by pressing the SETUP key for three seconds Your BMV 501 is now ready for use victron energy Oy 3 GENERAL OPERATION In normal operating mode the BMV 501 can display the six most important parameters of your DC system Use the lt and gt selection keys to select the desired parameter 1 4 1 Battery voltage V This readout is useful to make a rough estimation of the battery s state of charge A 12V battery is considered empty when it can t maintain a voltage of 10 5V under load conditions Current A represents the actual current flowing in or out of the battery A discharge current is indicated as a negative value current flowing out of the battery If for example a DC to AC inverter draws 5Amps from the battery it will be displayed as 5 0A Consumed Amphours Ah displays the amount of Amphours consumed from the battery A fully charged battery sets this readout to 0 0Ah synchronized system When for three hours a current of 12Amps is drawn from
9. d is the battery capacity F01 When using other types of batteries please ensure that all the relevant specifications are known to properly setup the BMV 501 Functions Users can fully adjust their BMV 501 with the help of twenty different settings called Functions Before setting up the BMV 501 the user has to activate the setup mode first The setup mode can be activated by pressing the SETUP key for three seconds The display will blink to indicate that the setup mode is active By repeatedly pressing the SETUP key the desired Function can be selected The selected Function is represented as Fxx where xx indicates the Function number The lt and gt keys can be used to alter the value of the selected Function By pressing the SETUP key again the next Function will be selected To save the changed settings to the BMV 501 memory the SETUP key must be pressed for three seconds until the display stops flashing and the battery monitor jumps back to normal operating mode again If the BMV 501 operates in the setup mode and no key is pressed for 90 seconds the monitor will jump back to normal operating mode automatically without saving any altered settings The table below gives an overview of all BMV 501 Functions including a short description It is recommended not to change the Functions F04 F05 F06 F09 F10 F11 F12 F13 F14 F16 F17 or F20 when in doubt For most battery systems only adjusting the values of Functions F01 F0
10. fficiency of a brand new battery is approximately 90 meaning that 10Ah must be transferred to the battery to get 9Ah actually stored in the battery This efficiency figure is called Charge Efficiency Factor CEF and will decrease with battery age The BMV 501 can automatically calculate the CEF of the battery 2 3 Peukert s exponent As mentioned earlier in chapter 1 2 the Peukert efficiency describes how if you discharge a battery faster than the 20hr rating it s Amphour capacity decreases The amount of battery capacity reduction is called Peukert exponent and can be adjusted from 7 00 to 1 50 in Function F10 The higher the Peukert exponent the faster the battery size shrinks with increasing discharge rate An ideal theoretical battery has a Peukert Exponent of 1 00 and doesn t care how big the discharge current is Of course such batteries do not exist and an F10 setting of 7 00 is only implemented to bypass Peukert compensation in the BMV 501 The default setting for the Peukert exponent is 1 25 and is an acceptable average value for most lead acid type of batteries However for precise battery monitoring entering the right Peukert exponent is essential If the Peukert exponent is not provided with your battery you can calculate it by using other specifications which must be provided with your battery The Peukert equation is stated below log t2 logtl n brad Cp l t where Peukert exponent n log 71 108 72 T
11. formation 500A 50mV current shunt this user manual installation guide self adhesive drill mould Accessories BMV 501 Connection kit art ASS030077000 length 10m art ASS030078000 length 15m art ASS030079000 length 20m art ASS030080000 length 30m BMV 501 temperature sensor art ASS030081000 length 10m art ASS030082000 length 20m art ASS030083000 length 30m BMV 501 communications interface kit art ASS030084000 BMV 501 Ethernet kit art ASS030075000 1 5 voltage prescaler art ASS030076000 Note the given specifications are subject to change without notice victron energy Oy 23 6 1 Declaration of conformity CE IMPORTER Victron Energy B V ADDRESS De Paal 35 1351 JG Almere The Netherlands Declares that the following products PRODUCT TYPE Battery Monitor BRAND Victron Energy MODEL BMV 501 Conforms to the requirements of the following Directive of the European Union EMC Directive 89 336 EEC The above product is in conformity with the following harmonized standards EN50081 1 1994 EMC Generic Emissions Standard EN50082 1 1997 EMC Generic Immunity Standard Signed R Vader U Authority Managing Director Date 12 September 2002 24 victron energy Oy
12. harging over charging excessively deep discharge too fast a discharge and too high an ambient temperature By monitoring your battery with an advanced battery monitor like the BMV 501 important feedback is given to the user so that remedial measures can be taken when necessary This way by extending battery life the BMV 501 will quickly pay for itself 1 2 How does the BMV 501 work The capacity of a battery is rated in Amphours Ah For example a battery that can deliver a current of 5Amps for a period of 20hours is rated at 100Ah 5 20 100 The BMV 501 continuously measures the nett current flow in or out of the battery so it can calculate the amount of energy removed from or added to the battery But since battery age discharge current and temperature all influence the battery s capacity you can t rely simply on an Amp hours reading When the same 100Ah battery is discharged completely in two hours it will give you only 56Ah because of the higher rate of discharge As you can see the battery s capacity is almost halved This phenomenon is called Peukert efficiency see also chapter 2 2 Also when the temperature of the battery is low its capacity is decreased even more This is why simple Amphour counters or Voltmeters give you far from an accurate state of charge indication The BMV 501 can display both Amphours removed not compensated and actual state of charge compensated by Peukert efficiency charge efficiency and
13. he battery specifications needed for calculation of the Peukert exponent are the rated battery capacity usually the 20hr discharge rate and for example a 5hr discharge rate See the calculation example below to define the Peukert exponent using these two specifications 5hr rating Cd 75Ah gt tl 5hr 1 75Ah 5hr 15A victron energy Oy 20hr rating C20 100Ah rated capacity gt t2 20hr gt 2 100Ah 20hr 5A log 20 log5 Peukert exponent n hea 1 26 1 Please note that the rated battery capacity can also be defined as the 10hr or even 5hr discharge rate The 5hr discharge rate in this example is just arbitrary Make sure that besides the C20 rating low discharge current you choose a second rating with a substantially higher discharge current When no ratings are given at all you can measure your battery using a constant load bank In this way a second rating can be obtained besides the 20hr rating which represents the rated battery capacity in most cases This second rating can be defined by discharging a fully charged battery with a constant current until the battery reaches 1 75V per cell is 10 5V for a 12V battery or 21V for a 24V battery a calculation example is shown below A 200Ah battery is discharged with a constant current of 20A and after 8 5 hours 1 75V cell is reached So gt 1t1l 8 5hr li 20A 20hr rating C20 200Ah gt t2 20hr 2 200Ah 20hr 10A
14. ing in the float stage the charger considers the battery full At this moment the BMV 501 must reckon the battery as full too so that the Amphour counting can be reset to zero and the state of charge reading set to 100 0 By precisely adjusting the charged parameters in the BMV 501 the battery monitor can automatically synchronize with the charger when the float stage is reached The range of the charged parameters is wide enough to adjust the BMV 501 to most battery charging methods When the BMV 501 can t be adjusted to the charging algorithm of the installed charger the user can always synchronize the battery monitor manually when the battery is fully charged This is achieved by pressing both lt and gt selection keys simultaneously for three seconds By manually synchronizing the battery monitor the CEF will not be calculated automatically When the supply voltage to the BMV 501 has been interrupted the battery monitor must always be synchronized in order to operate correctly Please note that regularly at least once per month fully charging your battery not only keeps it in sync with the BMV 501 but also prevent substantial capacity loss of your battery that limits it s life time victron energy Oy 2 6 Function overview The BMV 501 factory settings are suitable for an average 12V lead acid battery system of 200Ah So in most cases when monitoring a 12V system the only Function which possibly needs to be change
15. ked by the super lock Ask the installer for the password to unlock the monitor using the PC link Installer has cancelled some parameter readouts using the administrator software with the PC link Charge battery full equalize synchronize your battery with the monitor Check the charged parameters in Functions F02 F03 and F04 for possible wrong settings Check if all current is flowing through the shunt the negative terminal of the battery may only contain the wire going to the battery side of the shunt Current sense leads from the shunt are reversed Check battery capacity in Function FO1 Check CEF in Function FO9 Check Peukert Exponent in Function F10 Check Battery temperature in Function F11 Check Temperature coefficient in Function F12 Connection with temperature sensor is lost Check for failed connections and or cable damage If none of the above remedies will help to solve the problem you encounter it s best to contact your local dealer for further help victron energy Oy 21 5 1 Warranty Victron Energy B V warrants this battery monitor free from defects in workmanship or materials for 24 months from the date of purchase During this period Victron Energy B V will repair the defective battery monitor free of charge Victron Energy B V is not responsible for any costs of the transport of this battery monitor This warranty is void if the battery monitor has suffered any physical damage or a
16. lteration either internally or externally and does not cover damage arising from improper use install or repair by anyone other than Victron Energy B V qualified personnel Victron Energy B V is not responsible for any loss damage or costs arising from improper use use in an unsuitable environment or improper installing and user setup of the battery monitor 6 TECHNICAL DATA BMV 501 TECHNICAL DATA Supply voltage range 9 35VDC Supply current Vin 24VDC 6mA without BL Vin 12VDC 8mA without BL Input voltage range 0 35VDC Input current range 500 500A Battery capacity range 20 2000Ah Operating temperature range 0 50 C Readout resolution voltage 0 35V 0 01V current 0 200A 0 1A current 200 500A 1A Amphours 0 200Ah 0 1Ah Amphours 200 2000Ah 1Ah state of charge 0 100 0 1 time to go 0 100hrs 1minute time to go 100 240hrs hr temperature 0 50 C eG Voltage measurement accuracy 0 3 22 victron energy Oy Current measurement accuracy 0 4 Dimensions Frontpanel 65 x 65mm Body diameter 52mm Overall depth 72mm Net weight BMV 501 70 gram Shunt 315 gram Material body ABS sticker Polyester Equipped with Potential free normally open alarm contact 60V 1A max Inclusive BMV 501 battery monitor Safety and Regulatory in
17. o calculations Default 3 minutes Range 0 3 6 9 12 minutes Current threshold When the current measured falls below this value it will be considered as zero Amps With this function it is possible to cancel out very small currents that can negatively affect long term state of charge readout in noisy environments For example if an actual long term current is 0 05A and due to injected noise or small offsets the battery monitor measures 0 05A on the long term the BMV 501 can incorrectly indicate that the battery needs recharging When in this case Function 14 is set to 0 1 the BMV 501 calculates victron energy MB with 0 0A so that errors are eliminated A setting of 0 0 disables this Function Default 0 0A Range 0 0 2 0A Stepsize 0 1A Default _ Voltage prescaler This Function is only important when an optional prescaler is installed in the battery voltage sense input of the BMV 501 The voltage charged parameter undervoltage and overvoltage alarm settings are linked with this Function Don t change this value if you are not using a prescaler Default 1 1 Range 1 1 1 5 1 10 Display backlight mode Duration of backlight activation in seconds after pressing a key on the BMV 501 Furthermore settings can be made to leave the backlight always ON or always OFF In the setting AU the backlight will be activated automatically when the charge discharge current exceeds 1A or when a key is presse
18. so linked to this value It is recommended to keep this value at or around 50 0 Default 50 0 Range 0 0 99 0 Stepsize 1 0 victron energy Oy Low battery alarm OFF When the state of charge percentage has risen above this value and the alarm relay is activated the alarm relay will be deactivated again When FULL is selected the alarm relay is deactivated when the charged parameters are met Default 80 0 Range 0 0 100 0 FULL Stepsize 1 0 Undervoltage alarm When the battery voltage falls below this value after 10 seconds the message Lo shall appear on the display and the alarm relay will be activated Default 10 5V Range OFF 8 0 33 0V Stepsize 0 1V Overvoltage alarm When the battery voltage rises above this value after 5 seconds the message Hi shall appear on the display and the alarm relay will be activated Default 16 0V Range OFF 10 0 35 0V Stepsize 0 1V Charge efficiency factor CEF It is recommended to keep this value at AU automatic calculation The value A90 resets the automatic calculation to 90 A manual setting is represented by Uxx where xx is the charge efficiency See chapter 2 1 for more info about CEF Default AU Range U50 U99 AU A90 Stepsize 1 Peukert exponent discharge efficiency When unknown it is recommended to keep this value at 7 25 A value of 1 00 disables the Peukert compensation See chapter 2 2 for more information and a calculation e
19. the battery this readout gives 36 0Ah State of charge This is the best way to monitor the actual state of the battery This readout represents the current amount of energy left in the battery A fully charged battery sets this readout to 100 0 while a fully discharged battery is represented as 0 0 Time to go h is an estimation of how long the battery can support the present load before it needs recharging This time will be represented in hours above 100h or in hh mm format under 100h A time to go of 15 hours and 45 minutes will be represented as 15 45h Temperature C displays the present battery temperature This readout is automatically activated when Function F11 is set to AU and the optional temperature sensor is connected to the BMV 501 When connection with the temperature sensor is lost the display will return four dashes victron energy Oy The BMV 501 also indicates when the battery needs to be recharged again or when the battery is fully charged These indications are made using the CHARGE BATTERY FULL indicators at the bottom of the display In the table below the three possible combinations of these indicators are explained LINIYA CHARGE BATTERY flashing The state of A A Li charge of the battery has dropped below the CHARGE BATTERY adjusted discharge floor see Function F05 The battery needs to be recharged as soon as possible BATTERY FULL flashing The battery is full
20. two is that the setup lock can be disabled by anybody even without communication between BMV 501 and PC The setup lock is used to avoid accidental alteration of the Function values The super lock however can only be de activated via the PC link using a unique password The super lock feature is primarily meant for warranty purposes 5 TROUBLESHOOTING GUIDE PROBLEM REMEDY OR SUGGESTION The monitor doesn t operate no Check monitor and battery display connections Make sure the inline fuses are installed and not blown Check battery voltage Battery might be flat Vbatt must be gt 8VDC Try to restart the monitor by removing placing the fuses again Current readout gives wrong Current sense leads from the polarity positive current instead shunt are reversed Check the of negative when discharging installation guide The monitor resets all the time Check the wiring for corrosion and or loose contacts Battery might be flat or defective 20 victron energy Oy No changes can be made in the setup mode Not all readouts in normal mode can be selected CHARGE BATTERY or CHARGE BATTERY FULL keeps on flashing State of charge and or time to go readout not accurate Display returns in temperature readout Battery voltage readout is highly Check prescaler setting in inaccurate Function F16 Check if the setup lock is OFF Function F20 Your BMV 501 might be loc
21. victron ene AN y rgy USER MANUAL GEBRUIKSAANWIJZING Battery monitor BMV 501 Batterij monitor BMV 501 CE Copyrights 1999 2000 Victron Energy B V All Rights Reserved This publication or part thereoff may not reproduced in any form by any method for any purpose VICTRON ENERGY B V MAKES NO WARRANTY EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE REGARDING THESE VICTRON ENERGY PRODUCTS AND MAKES SUCH VICTRON ENERGY PRODUCTS AVAILABLE SOLELY ON AN AS IS BASIS IN NO EVENT SHALL VICTRON ENERGY B V BE LIABLE TO ANYONE FOR SPECIAL COLLATERAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH OR ARISING OUT OF PURCHASE OR USE OF THESE VICTRON ENERGY PRODUCTS THE SOLE AND EXCLUSIVE LIABILITY TO VICTRON ENERGY B V REGARDLESS OF THE FORM OF ACTION SHALL NOT EXCEED THE PURCHASE PRICE OF THE VICTRON ENERGY PRODUCTS DESCRIBED HERE IN For conditions of use and permission to use this manual for publication in other than the English Dutch French or German language contact Victron Energy B V Victron Energy B V reserves the right to revise and improve its products as it sees fit This publication describes the state of this product at the time of its publication and may not reflect the product at all times in the future victron energy Oy SECTIONS Page English 4 Nederlands 29 victron energy y INTRODUCTION
22. xample to calculate your battery s Peukert exponent Default 1 25 Range 1 00 1 50 Stepsize 0 01 victron energy Oy Battery temperature In this Function the average battery temperature can be adjusted The value AU enables the automatic temperature measurement provided that an external temperature sensor is connected to the BMV 501 Also the temperature readout in normal mode is enabled When AU is selected and the connection with the temperature sensor is lost four dashes are displayed and the internal temperature compensation calculations are made using the default 20 C value Default 20 C Range 0 50 AU Stepsize 1 C Temperature coefficient This is the percentage the battery capacity changes with temperature The unit of this value is Y cap C or percent capacity per degree Celsius The default setting is 0 5 cap C typical for most batteries The setting OFF disables temperature compensation Default 0 5 cap C Range OFF 0 05 0 95 cap C Stepsize 0 05 cap C Time to go averaging period Specifies the time window in minutes that the moving averaging filter works with Selecting the right time depends on your installation A value of 0 disables the filter and gives you instantaneous real time readout however the displayed values may fluctuate heavily Selecting the highest time 12 minutes ensures that long term load fluctuations are included in the time to g
23. y charged and the battery charger is probably operates in the float stage The charger may be turned off The monitor is synchronized with the Ag r al mn Tl Ze a ZA a ES gt 3 m c E r battery EENEN CHARGE BATTERY FULL flashing Charge the A A battery completely full This indication will arise CHARGE BATTE A lt T c E r when the BMV 501 decides that the monitor needs to be synchronized with the battery for example after a number of charge discharge cycles after a reset or immediately after power up victron energy Oy 4 ADVANCED FEATURES Besides the general functionality described in chapter 3 the BMV 501 offers additional advanced features too These features are reviewed in the next three chapters 4 1 Historic data The BMV 501 is able to store special events as historic data in it s memory The following events are stored as historic data The charge efficiency factor CEF automatically calculated each synchronization The number of equalizations This is the number of times the battery is fully charged meeting the charged parameters condition 06 The number of full discharges reaching a state of charge of 0 0 H10 The information stated above can be recalled in the history readout This readout can be activated by pressing all three keys of the BMV 501 for five seconds After this five seconds a flashing HOT shall appear on the displ
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