Inverter power output in node-red always zero

Modifications Node-RED
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I have Venus OS Large running on a Raspberry Pi connected via a VE.Direct USB cable to my 3000VA Phoenix 12V inverter. It’s an off-grid system. I can read the inverter voltage and current output in node-red and multiply them to output the power output to a gauge on the node-red dashboard. The current resolution is 0.1 Amps so the power output resolution is only 23 Watts. I want a more accurate measurement as good as that shown on the VRM dashboard to the nearest Watt. The inverter power output node always outputs zero though. This looks like a bug. Any advice for how to fix this? Thanks.

I should also add that I have a 12V 500VA Phoenix Smart inverter connected to the same battery bank and Raspberry Pi and the exact same issue is present with that one.

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Has nobody had a similar problem?

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Don’t have Node-Red but, FWIK, its variables are based on the dbus variables.
Indeed, the current can have only 0.1 resolution, although for some devices it’s 0.01, but what about voltage?
Generally the voltage has also 0.1 resolution, for some devices even 0.01…
Then the power resolution will be much smaller.

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I’ll see if I can extract those values thanks