Product Manual
4.0OPERATION
MORNINGSTARCORPORATION 31
4.0
4.2 Battery Charging Information
TheSunSaverhasa4-stagebatterychargingalgorithm
forrapid,efcient,andsafebatterycharging.Figure9
showsthesequenceofthestages.
NIGHT NIGHT
BULK
CHARGE
ABSORPTION
FLOAT
EQUALIZE
VOLTAGE
TIME
Figure 9. SunSaver charging algorithm.
Bulk Charge
Inthisstage,thebatteryvoltagehasnotyetreached
absorptionvoltageand100%ofavailablesolarpoweris
usedtorechargethebattery.
Absorption
WhenthebatteryhasrechargedtotheAbsorptionvoltage
setpoint,constant-voltageregulationisusedtoprevent
heatingandexcessivebatterygassing.
Float
AfterthebatteryisfullychargedtheSunSaverreduces
thebatteryvoltagetoaoatchargewhichissometimes
calledatrickle charge.
Dependingonbatteryhistory,thebatteryremainsinthe
absorptionstagefor3or4hoursbeforetransitioningtothe
oatstage.
Equalize (ooded battery type only)
TheSunSaverwillequalizeaoodedbatteryforthree(3)
hoursevery28days.Equalizechargingraisesthebattery
voltageabovethestandardabsorptionvoltagesothat
theelectrolytegasses.Thisprocesspreventselectrolyte
straticationandequalizestheindividualcellvoltageswithin
thebattery.
WARNING: Risk of Explosion
Equalizing vented batteries produces explosive gases.
The battery bank must be properly ventilated.
!
CAUTION: Equipment Damage
Excessive overcharging and gassing too vigorously
can damage the battery plates and cause shedding of
active material from the plates. An equalization that is
too high or for too long can be damaging. Review the
requirements for the particular battery being used in
your system.
AVERTISSEMENT: Risque d’explosion
Les batteries à évent et compensation produisent des
gaz explosifs. Le groupe de batteries doit être correcte-
ment ventilé.
!
PRUDENCE: Endommagement de l’équipement
Une surcharge excessive et un dégagement gazeux
trop vigoureux peuvent endommager les plaques de
batteries et provoquer l’élimination du matériau actif des
plaques. Une compensation trop élevée ou trop longue
peut provoquer des dégâts. Examinez les exigences
pour la batterie particulière utilisée dans votre système.
Dead Battery Charging
TheSunSaverhasaspecialchargingfunctiontorecover
batteriesthathavedischargedtoolow.Iftheterminal
voltageofthebatteryisgreaterthan1Volt,theSunSaver