Amberroot

[Step 1] Is your Inverter ready for the Solar upgrade ?

REhub controls the Mains input of the Inverter to utilize Solar when available

Loads are powered using Solar and Batteries during the day time. The mains input to the Inverter is switched off - therefore, it is preferable that the Inverter is a pure Sine wave inverter (Appliances like Fans produce a hum with square wave input - and with REhub the Inverter is 'Inverting' DC to AC through the day) .

REhub MPPT Eco is for 12V and 24V battery systems. It auto detects the battery system voltage and converts the extracted Solar power at the maximum power point voltage to the battery voltage.

[Step 2] Size and add Solar Panels

REhub MPPT Eco allows you to work with 12V/24V PV panels even in an all series arrangement reducing system costs

[1] REhub MPPT Eco has a continuous rated output of 25A. Like the other charge controllers in the REhub family (Namely REhub PWM and REhub MPPT ), REhub MPPT Eco safely limits the output to the rated current even if a larger PV array is connected to the unit. Because the peak output from Solar panels are available only on certain days, using a larger panel results in higher energy generated everyday.

[2] REhub MPPT supports array Voc of 90V. This has potential to reduce the system costs. PV panels are available in 36 Cell (called 12V panels) , 60 Cell (typ Solar PV panels used in MW plants) and 72 Cell (called 24V panels). Typically, the cost per watt of a 36 Cell panel is more compared to a 60 cell panel or a 72 cell panel. With PWM chargers, it is imperative to match the panel voltage with the battery system Voltage and therefore you are constrained to use 36 Cell panel with 12V battery system and 72 Cell panel with 24V battery system. With REhub MPPT Eco however, you can use 36 cell / 60 cell or 72 cell panel even with 12V system.

[3] With REhub MPPT Eco you can lower the wiring costs because you are operating at higher voltage at the input. You can even wire the panels in an all series arrangement and eliminate the need for array junction boxes in your installation.

[Step 3] Install the Solar PV and complete the connections

REhub MPPT Eco comes with a AC socket and a meter long cable with 3 pin plug for the Inverter's Main's connection unlike some other ' Retrofit' units or 'Converters'. . Wiring is simple , easy and safe. Just make sure that array Voc is less than 90V. REhub MPPT Eco is protected against PV and Battery reverse polarities.

REhub MPPT Eco: MPPT REhub for small Solar installations

Technical Specifications

Rehub-12/24-25
Operating principle	High efficiency MPPT Based Solar Charger to enable addition of Solar PV to existing home inverters. Maximizes the usage of Solar

System Specifications
Battery System Voltage	12V	24V
Recommended Solar module STC Wp	400W^a	800W^a
Output Current Continuous , Max	25A^a	25A^a
PV Open Circuit Voltage (VOC)	90V	90V
PV MPPT Voltage range	17-65 V	30-75 V
Input Current PV (Max)	20 A
Power Conversion Efficiency (typical)	95% typ	95% typ
Full load output voltage	Same as battery voltage
Float Mode Charge Voltage	13.5 V ( Factory Configurable)	27V (Factory Configurable)
Bulk Mode Charge Voltage	14.4 V ( Factory Configurable)	28.8V (Factory Configurable)
Ambient temperature range	-10C to 60C
Ports	1PV -Ve input,1PV +Ve input,1Battery -Ve Input,1Battery +Ve,1 15A and 6A 3 Pin Socket,1 6A 1 Meter long wire with 3 Pin Plug,1 Mode Switch,1 Modbus port
Dimension	200X120X95, IP20
Weight	~ 2 Kgs

Protections
Battery Reverse polarity	Electronically protected
PV Reverse and Short circuit	Electronically protected
Over current protection	System shutdown, recovers with a timeout
Over temperature protection	System shutdown, recovers with a timeout

REhub PWM : Upgrade to Solar

Amberroot's Renewable energy hub (REhub PWM) provides a cost effective way to add Solar PV to extend back up in homes for small solar installations.

REhub PWM includes a display that makes its easy to know the power generated, the availability of Grid power and to control the usage of Grid power thereby maximizing the usage of Solar energy.

LEARN MORE

REhub MPPT : Adding Solar to existing Inverters

REhub MPPT enables the addition of as much Solar PV as required for servicing loads and yet making sure the charge rate to the batteries are kept within safe limits

REhub MPPT provides the right combination for adding Solar PV. REhub MPPT intelligently controls the charging process in a way that keeps the batteries safe and therefore extends their life. They allow the maximal use of Solar power.