900-00272-01-001 Rev A
11
Battery Temperature Compensation
Battery performance changes when the temperature varies above or below room temperature (77°F or 25°C).
Temperature compensation is a process that adjusts battery charging to correct for these changes.
CAUTION: Hazard to Equipment
Temperature compensation should never be used with lithium batteries. Set the
Temperature Compensation
setting to 0 mV/
˚
C*cell.
The SkyBox, when equipped with the Remote Temperature Sensor (RTS), compensates for changes in
temperature. To achieve a representative temperature, the RTS is attached to a single battery near the center
of the bank. The SkyBox has a designated port for RTS installation. See the
SkyBox Quick Start Guide
for
more information.
If you do not have the RTS installed, you will get a notification on startup. This is even true if you are using a
lithium battery, which should not have the RTS anyway. This notification is there to remind the user that
temperature compensation is specifically important for lead-acid batteries.
For an explanation of how temperature compensation works, see the
SkyBox Programming Guide.
Charging Source
Let’s walk through a charge scenario. Normally, you simply make solar power on your roof and send it to the
utility. However, yesterday you had a power outage that lasted through the night. The SkyBox was great and
you hardly noticed there was an outage. Now your backup battery (attached to the SkyBox) is sitting at 30%
state of charge. It’s a sunny morning and the power has been restored. The SkyBox begins charging your
battery. If both solar power and utility power are available, the SkyBox uses solar power before trying to
charge from another source (like the utility). This function is independent of the chosen grid use profile.
While the SkyBox normally prioritizes using solar power over the utility, there are certain conditions which
prevent the SkyBox from using utility power at all to charge the battery.
o
AC Profile is set to
Self-consumption
, OR
o
AC Profile is set to
Non-export
, OR
o
AC Profile is set to
Maximum independence
, OR
o
Charge limit is set to zero kilowatts
There are also certain times when the SkyBox uses power from
any available source
to charge the battery.
This is usually to protect the battery.
o
A manual charge cycle has been initiated, OR
o
A low battery cutout event has occurred
Содержание OutBack Power SkyBox
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