PowerSync LFP-LV - System Setup; Best Practices

SECTION 6. SYSTEM SETUP
6. 1. BEST PRACTICES
6. 1. 1. PRE-COMMISSIONING CHARGING
Itisrequiredbylawforlithiumbatterymodulestobeshippedatorbelow50%stateofcharge.Thereforeupon
arrival,yourbatterymaybeatalowstateofcharge.
Ifmorethanonebatterymodulewillbeconnectedinparallelinastack,itisagoodpracticetoindividually
chargeallbatteriestoafullchargeusinga48VchargerthatiscapableofCC/CV(ConstantCurrent/Constant
Voltage).
TABLE 1. CHARGE VOLTAGE AND CURRENT
TheRecommendedChargeVoltageforthemodulesareasfollows:
Onceallofthebatteriesforyoursystemareatafullstate,proceedtotheinstallationphase.
6. 1. 2. MULTI-MODULE EQUALIZATION RECOMMENDATION
Inmulti-modulesystems,thePOWERSYNCbatteriesBMSwillbalanceallmoduleswithouttheneedforinstalling
externalBMScomponents.Duringnormalcyclingwherethebatteriesreach100%SOC(fullbattery),thebatteries
willautomaticallyauto-balancetokeepthemodulesoptimizedandwithintheacceptableparameterrangeof
one another.
Incircumstanceswherethemodulesarenotabletogettoafullchargeforafewdayssuchasinsolarwhen
youmayhavemorecloudinessthanusual,themodulesmaybecomeslightlyunbalanced.Whilethisperfectly
safeandnormaloperationofthebattery,overtimetheSOCofeachmodulemaydriftevenmorefromone
anotherasthebalancingprocessinitializesatchargevoltagesgreaterthan55V.
Therefore,inordertomitigatethesesituations,werecommendsettingthebatterysystemtoperforman
equalizationfor60minutesatleastonceevery7days.Dependinguponwhichinverteryouareusing,the
invertermaybepreprogrammedtodothistooccuronaregularbasis.Withsomeinverters,theequalization
mayhavetobeaccomplishedmanually.
Therecommendedvoltageforthe60minuteequalizationareasfollows:
Module Voltage Max Current
51.2V-100Ah 54.4VDC <100ADC
25.6V-200Ah 27.2VDC <100ADC
Module Equalization Voltage
51.2V-100Ah 55VDC
25.6V-200Ah 27.6VDC
www.powersyncenergy.com
(877)459-4591
©2022POWERSYNCEnergySolutions,LLC
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01/10/23
LFP-LV Module Product Manual