Battery Temperature - Xantrex Truecharge TC20+ Owner's Manual

Battery Temperature

Temperature Selecting the correct temperature setting selects the appropriate charging
switch voltage to compensate for battery temperature.
B a t t e r y T e m p e r a t u r e
Effect of Cold battery temperature If you choose the Cold setting,
temperature Truecharge + delivers, for example, 14.8 volts in absorption mode and
13.9 volts in float for a Flooded battery.
Hot battery temperature If you choose the Hot setting for the same
battery, the charger delivers 14.0 volts in absorption mode and 13.1 volts
in float, nearly one volt of difference from the cold battery charge.
Consequence of wrong selection If you choose a cold temperature
setting for a hot battery, you risk overcharging your battery. If you are in
doubt about which to choose, or if you are leaving the charger connected
for an extended time, select Hot to reduce the risk of overcharging. The
same is true for Gel and AGM type batteries. The life of your battery will
be extended if all banks are in a similar temperature environment and you
make sure the switch setting is correct each time you charge. You should
consider purchasing a Xantrex battery temperature sensor if you expect
wide temperature fluctuations.
S e le c t o r S w it c h
B a t t e r y T e m p e r a t u r e
C o ld W a r m H o t
1 4 . 8 / 1 3 . 9 1 4 . 4 / 1 3 . 5 1 4 . 0 / 1 3 . 1
1 4 .6 / 1 4 . 2 1 4 . 2 / 1 3 . 8 1 3 . 8 / 1 3 . 4
1 4 .6 / 1 3 . 7 1 4 . 3 / 1 3 . 4 1 4 . 0 / 1 3 . 1
O u tp u t V o lts
A b s o r p tio n / F lo a t
About Charging
C O L D
( b e l o w 5 0 ° F / 1 0 ° C )
W A R M
( 5 0 ° F / 1 0 ° C t o 8 0 ° F / 2 7 ° C )
H O T
( a b o v e 8 0 ° F / 2 7 ° C )
3–3