TriStar MPPT Installation and Operation Manual

36
Operation
Battery Charging Settings
The details of the TriStar MPPT battery charging settings are shown in tables 4-1 and 4-2 below.
All voltage settings listed are for nominal 12 Volt batteries. Multiply the voltage settings by two (2)
for 24 Volt batteries or by four (4) for 48 Volt systems.
Settings
Switches
4 - 5 - 6
Battery
Type
Absorp.
Stage
(Volts)
Float
Stage
(Volts)
Equalize
Stage
(Volts)
Absorp.
Time
(Minutes)
Equalize
Time
(Minutes)
Equalize
Interval
(Days)
off-off-off 1 - Gel 14.00 13.70 150
off-off-on 2 - Sealed* 14.15 13.70 14.40 150 60 28
off-on-off 3 - Sealed* 14.30 13.70 14.60 150 60 28
off-on-on 4 - AGM/Flooded 14.40 13.70 15.10 180 120 28
on-off-off 5 - Flooded 14.60 13.50 15.30 180 120 28
on-off-on 6 - Flooded 14.70 13.50 15.40 180 180 28
on-on-off 7 - L-16 15.40 13.40 16.00 180 180 14
on-on-on 8 - Custom Custom Custom Custom Custom Custom Custom
* “Sealed” battery type includes gel and AGM batteries
Table 4-1. Battery charging settings for each selectable battery type
Shared Settings Value Units
Absorption Extension Voltage 12.50 Volts
Absorption Extension Time Absorption Time + 30 minutes
Float Exit Timeout 60 minutes
Float Cancel Voltage 11.50 Volts
Equalize Timeout Equalize Time + 60 minutes
TemperatureCompensationCoefcient* - 5
millivolts / °C / cell
* 25°C reference
Table 4-2. Battery settings that are shared between all battery types
The TriStar MPPT provides seven (7) standard battery charging settings that are selected with
the settings switches (see Figure 4.1 above). These standard charging settings are suitable for
lead-acid batteries ranging from sealed (gel, AGM, maintenance-free) to Flooded and L-16 cells.
In addition, an 8th charging setting provides for custom set-points using MSView
TM
PC software.
Table 4-1 above summarizes the major parameters of the standard charging settings.
ThesharedsettingsinTable4-2arecommontoallbatterytypes.Thefollowingchargingproles
graphically explain the shared settings.