V3.70 beta amps vs watts questions and discussion

Please return to the Brief slide displaying the current in amps for the battery!
Just like it was in release 3.55
Thx!

I tested this but it seems it’s all amps or all watts, only amps for battery is not available I think.

Another adviser
Change it and see what happens!

Enjoy

Do you see the difference between the screenshots?

It’s showing amps for all, he wants only the battery in amps and the rest in watts

Yeeesssssssss!
Amps live, come and go in a battery, but not watts.
This makes it convenient to track the current loads in amperes for the battery.

This was flagged as a bug and got ‘fixed’, unfortunately. I second the request to reenable the ‘bug’ to displac AC power as Watts and DC power as Amps.

3 Likes

I would like to see both amps and watts, the amps in the slightly smaller grey font like how it was in v3.55, and below that watts in the larger white font, matching the style of the other watt numbers. There should be enough space.

2 Likes

I’ve set electrical power display as current (amps) but solar is still showing as watts
Is that expected behaviour?

There can be no discussion here!
In batteries, you need to control the current in amperes!
Battery capacity is measured in amperes, but not in watts!
Watts for housewives who dry their hair with a dryer are in loads.
So return to how it was before!

Stay on 3.55

1 Like

As a sailer I understand you.

But for almost all the people with a home battery, amps mean nothing.

They only think in Watts.

But regardless, its all noted and understood and we’ll look into this - thanks for flagging this

2 Likes

Hi, Matthijs!
I’m glad you can hear me!
As an integrator, I always train the client and indicate the control of the current strength in the DC chain. Because it is very important.
And they can always see the watts they understand in the loads.

Thanks.
Being able to select either watts or amps is useful depending on the user preference.
But of course important that all DC loads change to watts or amps, then can be useful comparison.

After years trying I completely gave up on the hope ever to be able to convert a sailer from amps to watts as measure of power :nerd_face:

1 Like

Actually you need to control the tension in volts.
Volts result in Amps.
If you want to charge slower, lower the charge voltage and not the max charge current.
Because internally the charger works with the voltage to steer the current.

Technically that would be AmpHours, but now I’m nitpicking :wink:

1 Like

Voltage for lithium batteries is not informative.
There is no direct depends, it is non-linear.
For both states charge/discharge.
It must be seen, but an assessment can only be made at the boundary values.
But amperes must always be monitored.
If you know what I mean.

Battery Amps (& Voltage) must be monitored during charging and discharging, I fully agree there.
Those two separately can be more important than the Watts.
For a Lithium or LFP battery, the voltage can’t be directly linked to the SoC, that’s true as well.

Specifically for charging, the control element of the Amps should be the Voltage (contrary as that may seem).

Am currently (re-)building my “SoC / Charge Limiter” Node Red flow that I use to limit charging my batteries higher than a certain SoC (usually 90% in my case) to avoid unnecessary charge wear.
My Fronius PV inverters can be throttled directly in Watts, to properly limit a Victron MPPT the max charge voltage needs to be manipulated.
Double so if “DC-coupled PV - feed in excess” is enabled, as that disabled the DVCC Charge Current Limiter.

Can we please stay on topic and advocate for the display of motor power in amps on the boats page

(and elsewhere possibly)

1 Like

It’s enough to just vote if you have nothing to add.

1 Like

Vote all the way on the top left of this topic. With 130 views and only 2 votes it just you me for now. I don’t think people even know about voting to be honest.

I voted this up BUT feel like I can add some supporting information and ask the question why can’t we have both? Meaning a GUI toggle setting that allows am amp centric way of viewing things or watts centric view. I’m life long sailor and I too have always thought in terms of Amp Hours but more recently have been trying to convert a Watt Hours way of thinking. My house has 41 solar panels roughly 10KW, I generate between 40-60Whrs/day depending on the time of year, my house consumes 1MWhrs/month plus/minus depending on time of the year. My utility bills monthly in KWhrs. For my house Watt Hours make sense.

My sailboat had 3X80Watt solar panels and I had 1200Ahr AGM bank, always thought in terms of 100Ahr/day was consumption and what could my panels give me in terms of Ahrs/day. My “thinking” conversion to Watt/hrs happened on my current trawler this year when I replaced 1350Ahrs of AGM batteries with 1200Ahrs/30KWhrs of Victron LiPoe4 batteries and replaced my inv/chgs with Victron MPIIs. My Sailboat was 12Vdc setup, my trawler is 24Vdc both had/have now 1200Ahrs of capacity but twice the voltage means twice the energy density. P = I x V So my Sailboat had a roughly 15KWhrs of capacity while my trawler now has 30KWhrs of capacity. This summer I added 1000W’s of solar to the roof of the trawler and I started thinking in terms of Whrs of solar generating capacity going into my 30KWhr bank. I still like to see amps it makes me feel good, it seems commonsensical to me BUT I’m starting to get the Watts concepts too!

My laptop has 100Whr battery, I see electric vehicle specs all have battery capacities of 50-100KWhr battery packs. The cars are talking in terms of watts/mile not amps/mile, so I want to change my “thinking” but man I still love me some amps. When those solar panels get full sun at noon and I see 25Amps at 28V’s going into the battery I think that’s good BUT in reality why am I only putting in 700Ws when I have 1KW of solar panels on my roof. I know there is conversion efficiencies and loss but my point is if you only think in terms of Amps you miss out on some of the energy information that Watts or Whrs gives you. So IMO Victron should support viewing both ways as it’s just a math calculation and a GUI setting to toggle……

Scott in Sunny FL aboard M/V MARIAH