Still 730W while power off

Hi all,

Yesterday I installed my flm and everything seems to work fine. Yesterday evening I pulled out the power plug of the flukso for a few minutes to mount a new socket. After that, when the connection was established again, the curve showed during the power-off still 730 Watt consumption. How is that possible?

Bert

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michi's picture

Do you have a PV system installed as well? Some people have mentioned that the inverter can create a phantom load.

Michi.

Bert Hilhorst's picture

I have a pv-system that shows no production. The other clamp (consumption) shows 730W. But when the power of the flukso is off it cannot send or backup any data during that time.

Bert

michi's picture

Depending on how your PV system is wired up, it may (or not) be possible to isolate the PV system from the circuit by flipping the circuit breaker on the AC side. If that galvanically disconnects the PV system from where your current clamps are attached, it will help: if you see the reading from the Flukso unchanged, you know that the phantom reading isn't caused by the PV system. If the reading does drop, you know that the PV system puts a phantom load on your circuit.

Unfortunately this will work only if your current clamp is placed at a point on the wiring where it will be disconnected from the PV system when you flip the circuit breaker…

The only other thing I can think of is that, at the time you disconnected the Flukso, you were drawing a lot of power and, when you reconnected the Flukso, it reported the average consumption over the period of time it was disconnected. But, within a few minutes, the reading should correct itself (basically, when the Flukso resumes communication with the server after you power it up again).

One thing you could try is to isolate everything: turn off the house and turn off the PV system at the circuit breakers. Power the Flukso either off a battery, or one of those $5 inverters that you can buy for your car cigarette lighter. You will have to connect your modem and wireless router to that too, so the Flukso can run and upload. The car cigarette lighter inverters can handle about 100 W or so, which is plenty. If the Flukso still thinks there is a load, it's a false reading.

Michi.

bazzle's picture

It averages out. How is it now?

Bert Hilhorst's picture

Thanks for your reactions sorry for my late reaction.
I just switched off the pv-system. On the minute tab I saw the solar current drop to zero and at the same time the consumption currnet rise. After a few minutes I switched on the pv-system and the curves both went back to what it was before. In the attachment you see the situation. I was wondering if the blue and the invisible brown bar underneath the switches can influance my readings.

Gr. Bert

bazzle's picture

Wait a couple of days with all left on and see what the graph shows then. I doubt the straight links will affect anything.
Using current clamps are not always the most accuarate but is the easiest when you know what you are seeing. and
Also if that is the main input wire it may show the household consumption that then reverses when pv turned on. Depends on where it tis wired, differential or direct.

Bazzle

fusionpower's picture

Looking at the image you attached, i am assuming the wires to the bottom rightmost breaker are the solar and the wires to the bottom of the third breaker from the left is the incoming grid power.
It looks like the consumption clamp will be getting the sum of the consumption and solar.
Without a main breaker for the incoming power it would be difficult to rewire to isolate the consumption from the solar. And as the switchboard is already fully populated it would be difficult to add a main breaker.
I had bars like those in my switchboard to common up the main breaker and other circuit breakers. I got the electrician to rewire it so that i could get a clamp on between the main breaker and the other circuit breakers. The solar wired to the main breaker with the solar clamp attached.