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2005 OutBack Power Systems Inc.
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RTS
e OutBack Remote Temperature Sensor (RTS) is a necessary tool
for proper battery charging. All OutBack products with integrated
battery charging have a temperature compensation system built-in
which benefi ts from the installation of the optional RTS. e RTS
ensures that your OutBack system knows the precise ambient tem-
perature so that it can recharge your batteries safely and effi ciently.
Systems with multiple OutBack products connected to one HUB4 or
HUB10 require only a single RTS to be installed.
Remote Temperature Sensor
Battery Charging
Batteries are a key component in backup and off -grid systems, o en serving as the only energy storage device.
To guarantee that they function properly it is important that your batteries are maintained. A chief part of this
maintenance is proper charging. Your batteries should always be maintained above a 50% level of charge and receive
a complete recharge once a month to ensure operation at peak performance. Prolonged use of the battery below a
50% state of charge will adversely aff ect the long-term health of the battery and can result in premature failure.
e multistage charging process uses several regulation stages to allow fast recharging of the battery energy
storage system while ensuring a long battery life, high performance and effi cient operation of the overall system.
e charging process begins with the BULK stage, where maximum current is sent to the batteries until the target
“absorb” voltage is reached and the absorb stage of the charge begins. During ABSORB, the charger provides the
batteries with the just enough current to hold at the set voltage for a preset amount of time. Following this cycle, the
charging system changes between available OutBack charging products. Using the MX-60, the batteries enter the
FLOAT stage where they are given a maintenance charge until there is no excess renewable energy. e FX or VFX
inverter/charger will go into SILENT mode where the charger turns off until the battery voltage drops to the
“re-fl oat” setting. At this point the inverter/charger initiates the maintenance FLOAT charge. is method reduces
fuel and utility consumption.
It should be noted that the temperature of your batteries has an impact on the charging process. e OutBack RTS
should be used to monitor this. In higher ambient temperatures, the battery charging regulation settings will be
reduced to prevent overcharging of the batteries. Conversely, in lower ambient temperature conditions, the regulation
settings will be increased to ensure complete recharging of the batteries.
Batteries are composed of a group of individual cells. rough normal use, the charge of each individual cell will not
be equal to the other cells. To address this, your batteries should be EQUALIZED either once each month or once
every few months depending on usage. During the equalization charge the electrolyte in the battery is stirred up by
gas bubbles, which help to create
an equal mixture of water and
acid. Simultaneously the full cells
are overcharged which allows the
low cells to “catch up” and all of
the active material in the battery
to be reconverted to its charged
state. Depending on usage, the
hardened battery plate material
that is no longer active in the bat-
tery-sulfation can also be reduced
by an equalization charge
.
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BULK ABSORB SILENT FLOAT TIME* SILENT FLOAT TIME* SILENT
TIME *
Time
Voltage
* MATE Adjustable
15' (5 m) cable