New System, 2nd day, why would the battery discarge to the grid at night, only watts but it still annoying, solor Idle 0w ofc, Home No Load 0w to 76w, Battery Discharging 29w, Grid Exporting 29w,
Inverter Eco: Enabled, Battery Options: Reserve 7%, charge power 2600w, discharge 2600w
Loderhouse this is to be expected, the inverter takes a few seconds to ramp up/down to match load so you may find some small import/export as it does this.
I've found there is never a 100% match. It seems as if the inverter only handles steps, which means there is often 30 to 40w of import or export. Sometimes it makes sense to leave a couple of extra things plugged in or switched on! It seems that most of the time the smart meter shows 1p per hour.
[https://photos.app.goo.gl/7JFjU5WMe4ZTwKtP6](https://)
I too have found this behaviour. I have a daily house load of approximately 250w, this is a constant being handled by the battery. So to my mind the inverter is 'working'
Then if I switch on an appliance (Sage mini oven) which draws 2.4kwh, this takes power by 'pulsating' heat elements,(5 seconds on 5 seconds off) which the inverter cannot seem to handle and power is taken from the grid to power that appliance.
So all in all, 250w or so being handled by the battery already, then this 'pulsating' demand is not handled by the battery.
Max draw / load in my system is 3kwh
Dean There are other threads highlighting this issue. IMO your mini oven is behaving in an inappropriate manner. It's like pumping the accelerator pedal on your car to maintain a constant speed. It does work but is not the best for the engine or your fuel consumption. In fairness, a conventional oven also works in the same way but has a longer time between "pumps". A conventional oven switches the element on and waits for it to reach the set point on the thermostat, at which point it switches off. When the thermostat detects the oven is below the temperature set point, it switches the element on again. This switch on/off typically takes minutes. With a load lasting minutes, the inverter has time to ramp up to meet demand and then ramp down when it reaches temperature. You may be better off using the oven and draw from battery than your mini oven if it behaves as you suggest.
Tim Unless its an Induction.
These indeed pulse, the higher the setting, the longer the mark to space ratio, till full is all on.
My Battery hates the induction hob, but hey ho. They are way more efficient than halogen
Indeed, that mini oven's behaviour is super annoying... but only if you have a battery you are intending to use, otherwise it's more economical by comparison to a conventional oven, smaller space to heat and on/off faster.
My concern is the inverter should be up & running already as it's managing house load, so why can it not handle this ramp up? I'm not an inverter expert hence the question.
The answer is "it depends".
It depends on which inverter you have installed, Generation and Size.
They both impact the maximum load that can be drawn at any one time from the inverter.
There's a thread some where on here about it but but you need to look at the data sheet for your inverter and specifically the section:
Nominal Power or Nominal AC Output Power which can be found under Battery Power.
If you exceed this load then you will draw as much as is possible from the inverter/battery and the remainder from the grid.
It does get a little more complicated as, I believe, they have pulled the very earliest data for the original inverters and instead list only the most recent versions.
My battery is 8,2Kwh and the inverter is a 3Kwh inverter. So the battery can charge at a 3Kwh rate and deliver power to the house at 3Kwh,
The house load is approximately 250w and the mini oven is demanding 2.4kwh, So a total of 2.8kwh. Within the 3kwh capacity I have
The odd thing is, the graph shows me when the mini oven kicks in and the inverter meets its initial demand along with house demand. Then when the oven first 'pulses' the draw from the oven and the house load is taken from the grid as inverter seems to just stop. Then when the oven demand is finished... normal service resumed