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Flint by Chargee: connect an Eastron meter

What Flint adds to Sparky, which Eastron meters work and how to wire them.

Flint by Chargee is an extended version of Sparky. It does everything Sparky does, plus:

  • A Modbus RTU (RS485) input for an energy meter

  • An RJ45 input for a wired internet connection

Flint costs €179 excl. VAT (list price). We keep Flint in stock.

Which meter can I connect?

The Modbus RS485 input (the blue port in the image above) connects Flint to an Eastron meter. Any Eastron meter with RS485 output works with Flint.

In-line meter (up to 100 A)

  • Eastron SDM72D-Modbus: we supply this meter (€79 excl. VAT, list price).

  • Eastron SDM630-Modbus: also works. We do not sell this one ourselves.

Meter with CT clamps

Use the Eastron SDM630-Modbus CT. It works with several types of current transformers, for example split-core 150 A or 500 A CTs, or flexible Rogowski coils for 1,000 A or 10,000 A. You set which CTs you use on the SDM630 itself, see the manual.

The Modbus cable

We supply this cable with Flint. One end has 0.75 mm² ferrules, the other end an RJ45 plug.

Plug the RJ45 plug into the RS485 port on Flint. Then connect wires 4 (B-), 5 (A+) and 8 (GND) to the terminals of your Eastron meter.

SDM72D-Modbus

  • Wire 4 to B-

  • Wire 5 to A+

  • Wire 8 to G

SDM630-Modbus

  • Wire 4 to B

  • Wire 5 to A

  • Wire 8 to G

SDM630-Modbus CT

  • Wire 4 to terminal 13

  • Wire 5 to terminal 14

  • Wire 8 to terminal 12

Need help?

Volt Time: [email protected] | +31 85 485 15 02

Chargee: [email protected] | +31 85 080 5711

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