Allgemeine Informationen
Offgridtec GmbH
Landshuter Str. 141 – 143
84307 Eggenfelden
WEEE-Reg.-Nr. DE37551136
Kontaktinformation
Tel: 08721-7786187
Email: info@offgridtec.com
Web: www.offgridtec.com
GFR: Christian & Martin Krannich
Konto Sparkasse Rottal-Inn
Konto: 10188985
BLZ: 74351430
IBAN: DE69743514300010188985
BIC: BYLADEM1EGF (Eggenfelden)
Sitz und Amtsgericht
HRB: 9179 Registergericht
Steuernummer: 141/134/30045
Ust-IdNr: DE287111500
Gerichtsstand: Mühldorf am Inn
1. Overview
1.1Information & Features
Offgridtec MPPT Pro Duo charge controller apply to charge two batteries (shown as BATT1 and BATT2 below) at the same
time in a solar system. This controller supports multiple life battery (BATT1) types, including Sealed, Gel, Flooded, LiFePO4,
and Li-NiCoMn, which is suitable for RV, Camper, Boat, and so on. The device recognizes the start battery (BATT2) system
voltage automatically, and trickle charge the battery when the conditions are satisfied.
The controller adopts the advanced MPPT control algorithm,which will minimize the maximum power point loss rate and
loss time,also fast track the maximum power point(MPP) of the PV array, and obtain the maximum energy from the solar
array under any conditions. The energy utilization in the MPPT solar system is increased by 20-30% compared with PWM
charging method.
When there is no manual operation for a long time, and the charging conditions cannot be reached, the controller will turn
to low-power mode, which reduces the loss and battery power waste to enhance the products life. The system
parameters are shown and set by LED/LCD or the MT11 remote (Accessory).
The AES control signal of the car refrigerator is built in the controller, which will supply the surplus solar power to the
refrigerator to avoid energy waste. The controller protection level is IP33, which is waterproof and dustproof. Multiple
protection features, including battery overcharge protection, over discharge protection, and reverse connection protection
of the PV and battery, which effectively ensured the solar system safety, stability, and lifetime.
Features：
Max Power Point Tracking technology with ultra-fast tracking speed and the tracking efficiency is no less than 99.5%
guaranteed.
Advanced MPPT control algorithm to minimize the MPP lost rate and lost time
The higher range of the MPP operation voltage to improve the PV module utilization.
Limited charging power & charging current auto control feature (BATT1).
High quality and the low failure rate of components(ST, TI, and Infineon) to ensure the product life.
Digital circuit control of adaptive three-stage charging mode to enhance BATT1 life.
BATT1 type can be set via LED/LCD.
The product runs into the low-power mode when there is no manual operation for long time, and charging conditions
are not satisfied (PV<5V).
100% charging and discharging in the operation environmental temperature range.
LED and LCD selectable.
AES control signal for car refrigerator to avoid energy waste.
Standard Modbus protocol, and RS485 (5V/200mA) communication port for the customer to expend the application
area.
①Life battery (BATT1) is the energy storage battery for powering the household loads in the off-grid system, which
supports Sealed, Gel, Flooded, LiFePO4, and Li-NiCoMn batteries (the controller can NOT recognize the system
voltage automatically).
②Start battery (BATT2) is the energy storage battery which usually built in the vehicle for powering the system such
as RV and Boat, and only supports lead-acid battery (the controller will recognize the system voltage automatically).
NOTE: the BATT1 and BATT2 are at the same voltage level.
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