Folks,
Perhaps it’s the lack of coffee and sleep but I have some trouble to understand the following numbers;
To Grid: 58.5 kWh
From Grid: 159 kWh
Consumption: 293 kWh
Solar: 217 kWh
How do I compute the net result of my ESS system since I turned it on late August 2024.
/rw
Solar: 217 kWh <— this much your solar system produced
To Grid: 58.5 kWh <— this much you exported back to grid (excess solar power or discharging
your battery to grid)
From Grid: 159 kWh <— how much you’ve used from grid to power your load (including charging
batteries from grid if you do so)
Consumption: 293 kWh <---- how much you used to power your load (charging batteries is
excluded)
@Mysik I did understand that 
but I’d like to understand the “net” result of the installation.
In other words what did I still consume from the grid so I can further optimize? I’m aware it’s a give & take so the grid will never be zero as my system is only single phase ESS for now.
@RobertWelling
“In other words what did I still consume from the grid…”
From Grid: 159 kWh 
this is your grid consumption,
I’m not sure what you mean by “net” consumption and what exactly is your goal.
Are you trying to use all your generation, or are you trying to be use less grid, or what exactly you want to achieve? You need to be more specific.
Thanks @Mysik My objective is to consume as less as possible grid power.
It’s clear I can’t achieve a (near) zero grid usage this with a 1 Phase ESS while’st having 3x25a grid (Dutch) grid connection. So I’m trying to understand where to invest first by expanding 1) battery storage (currently a single US5000) by adding another one 2) first adding 2 additional multiplus’s.
Also, I now know that 159kWh is my grid consumption and isn’t a part of a sum.
@RobertWelling
First of all from the data you provided it looks like you have some excess solar power because you exported 58.5 kWh… so increasing your ESS capacity might be a good first step.
To decide what would be the best next step it depends on so many things that we don’t know, that it is hard to say with info provided.
You need to look at much bigger picture than just pure total kWh for the month (or few months).
How big is your solar array, what is your daily average power consumption (total and per phase), what is you load and peak load on each phase, etc. There is soooooo many different thing you need to consider. Also time of the year is a big factor. The same system in Winter time will look completely different than in the Summer. So if you want to be “independent” through the whole year then it will cost much more than if you would stay close to “zero” for 8-9 months of the year.
@Mysik thank you for your detailed reply, much appreciated. Agree with the “time of the year” and I will start with expanding the battery capacity and take it from there. Have a great rest of the day.
Hi
Your net usage from grid (gesaldeerd) is 159 - 58,5 = 100,5kw depending off your energy contract
So yes first is to expand some battery power, depends also on what system you are using 3k,5k, 8k
Next step would be 3 phase and possibly solar expansion
Hoi Marc, dank je wel.
Thanks for the additional detail, I currently operate a single MultiPlus 2 48/3k and planning to expand to a full 3p system next year May/June.
My energy supplier is Next.Energy with a dynamic contract and my solar array is a 2x4 AEG 375w system, connected to a 250/70 Victron MPPT. I can’t expand the solar array anymore and at such day like today (Oct/24) it’s already forcasting a nice 6kWh of production so I agree to first add another 4.8K US5000. They are getting pretty affordable by now.
/rw