Selectronic SP PRO Specification sheet

TN0045 Revision 02 – 1 of 2
SP PRO Interactive Inverter Charger
Technical Note
POWER PERFORMANCE PASSION
SP PRO Shunt Installation
Introduction
The SP PRO accurately monitors current in and out of the battery bank to keep track of the
batteries State of Charge (SoC). The SP PRO internally measures any current flow to and from
the battery caused by itself but requires additional external current shunts to measure other
connected components like solar input or DC loads. The SP PRO has two shunt sense inputs for
this purpose.
Installation
SHUNT WIRING
External shunts MUST be installed on the battery negative side, between the battery negative
terminal and the solar or DC load.
To Solar and/or DC Load
Note: Shunts installed in any other position will not work correctly and may cause damage to
the SP PRO.

TN0045 Revision 02 – 2 of 2
SP PRO Interactive Inverter Charger
Technical Note
SHUNT SENSE WIRING POLARITY
Polarity is important when using the shunt in “Dual” or “Multiple SP PRO” mode – that is where
the shunt is used for both input and output measurement to obtain a nett result. In this case
the sense wiring must be as shown above – 1A or 2A terminal to the solar and load side, 1B or
2B to the battery negative side.
Note: In “Dual” or “Multiple SP PRO” mode, shunt currents are displayed with a sign; a positive
(+) number means charging and a negative (-) number means discharging.
The polarity of these shunt sense leads is not important if they are configured to either “Load”
or any of the input selections, such as “Solar”.
SP PRO Configuration
The SP PRO by default ignores any input from the shunts. Please consult the SP PRO User
Manual for configuration and zeroing of the shunts.
Additional Information
Selectronic web site – http://www.selectronic.com.au or contact the Selectronic Sales Team.
[phone]
www.selectronic.com.au