Progress Solar/Wind SLT 700 Series Operator's Manual page 20

Maximum Power Point Tracking (MPPT) Controller Operation
The MPPT Controllers are located inside the control box. The component is an advanced
maximum power point tracking (MPPT) solar battery charger and load controller for stand-
alone off-grid photovoltaic (PV) systems.
This controller features a smart tracking algorithm that maximizes the energy from the solar
module(s) and also provides load control to prevent overcharging or over-discharging of the
batteries. Each controller runs independently and each one is interconnected with a
24VDC bank of batteries, a group of 24VDC floodlights, and a user controllable timer for
the lights. The only routine interaction a user needs to have is to observe performance
characteristics and real time status. USB cables are available in the bottom of the front
control box to enable the user to download historic performance data.
The advantage of the MPPT technology is typically an overall increase "boost" in the
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solar charge current flowing out to the battery to help them recharge faster, when
compared to other light/charge controllers.
The battery status LEDs provide approximate battery state-of-charge indication and also
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indicates when a system or load fault condition exists.
The light tower lights are controlled automatically through the automated Light Timer(s).
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See that section for operating instructions.
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