Selectronic SP PRO Technical Notes

Interactive inverter charger shunt installation

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SP PRO Interactive Inverter Charger

Technical Note

SP PRO Shunt Installation

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.

HUNT

IRING

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 – 1 of 2

POWER

PERFORMANCE

PASSION

Table of Contents

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Page 1 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.
Page 2 IRING OLARITY 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.