MPPTLA-PR281® Solar Load Controller & Maximum Power Point Tracking Unit

The latest techniques and technology have been applied in bring this product to you. It not only controls the solar panel to always supply the most efficient power, but it also controls and monitors the state of a Lead Acid battery. It identifies the state that battery is in, and using proprietary algorithms, ensures that it controls and maintains the battery at it most fully charged state.

Typical applications include :-
Low cost home owners, RDP houses, bush houses, stables, ware houses, store rooms or any area which requires lighting and there is no electricity available. Mains failure back up.

  • Easy to install!
  • MPPT standard!
  • Lead Acid Battery Charger!
  • 1 Day/Night switch circuit and 3 individually switched circuits!
  • Electronic Fuse protected outputs
  • Low Battery Cut Out!
  • User over ride of battery cut out!
  • Models cover different PV panels!
  • LED feedback Indicator!
  • Peace of mind!

Installation of the unit is simple. Find a suitable spot, drill 2 holes and mount the MPPTLA unit. Then connect the 12V circuits to the respective switched positions by following our installation instructions.. Connect the battery and the Solar panel, and the unit is ready to operate. The MPPTLA will now charge your battery when the sun is shining, and protect the battery when you are using the MPPTLA at night. Part of the battery monitoring in the MPPTLA ensures that the lead acid battery is never discharged beyond its minimum discharge point, by disconnecting the load, until the next charge cycle has sufficiently charged the battery.
A user over ride switch is available in the case that light is required, beyond the recommended battery cut out value. This ensures that you have light in cases of an emergency. To protect the battery, a 1 hour timer or a minimum of 10.5V will disconnect the load to prevent permanent damage to the battery.

MPPTLA-PR281 ® manages your Off Grid system by:
Ensuring maximum efficiency from solar panel
Battery charged with maximum power available from panel (MPPT), increasing system efficiency
Works over the widest possible voltage fluctuation from the Panel
Low Voltage cut out to protect battery
Built in Day Night Switch for security light operation on one switch circuit.
Standard resettable overload to prevent damage to the wires and battery.

LA09 – use a 20W solar panel and a 9A deep discharge lead acid battery
LA18 – Use a 30W solar panel and an 18A deep discharge lead acid battery
LA25 – Use a 55W solar panel and an 25A deep discharge lead acid battery
LA45 – Use a 70W solar panel and an 45A deep discharge lead acid battery

MPPTLA-PR281 ® Technical specifications

PV Input
PV Input Supply Voltage: 0 – 27V D.C.
PV Current at full charge mode: 10mA- 4.5A
PV Panel Rating: 10W to 70W
PV maximum load voltage value: 17 – 18V DC
MPPT Current with no load: 10 – 15mA

Battery Input (Not Fused – we recommend use an external 5Amp fuse for protection)
Voltage: 10.5 – 16V DC
Maximum current absorbed at full charge 5A (PV Panel size and time of day dependent)
Current draw with no load and no PV voltag: 10 – 15mA

Voltage: greater than 11.5V to Battery terminal voltage
Low voltage cut out: Less than 11.5V DC
Current: Maximum is 4 Amps – not fused
Day/Night switch: 1 Channel Electronic Fuse protected 1A
All day switching: 3 Channels Electronic Fuse protected 3A

Charger (Intelligent charger working in the parameters below)
If battery voltage below 11.5V then Boost mode till voltage reaches 14.5V
If voltage between 11.5V and 14.5V then trickle charge mode

MPPT Mode (Maximum Power Point Tracking)
The micro controller uses switch mode technology to ensure that the Solar Panel always operates at it most highest efficiency point at all times. Using this method it increases panel output by 30% over other conventional methods. Introducing this switching technology ensures that smaller PV panels can be used to achieve the same amount of power using a larger panel.