question

Haze Hell avatar image
Haze Hell asked

Why is my UPS consuming more than expected and can I change the configuration?

Hello,


In my remote console, my ESS the network setpoint is configured to 20W

1720091375964.png

What is the reason?

The installer informs me that these are prerequisites by Victron for optimal operation.

In this case why while my panels produce little, that my batteries are full, it happens that this value is 10 times higher (200W).

1720091431779.png

Can I change this to 0W? What is the reason for this 20W exactly? What risk could there be if I pass this value to 0W?


Regards


Bonjour,

Dans ma console à distance, mon ESS le point de consigne du réseau est configuré à 20W

1720091382280.png

quelle en est la raison ?

l'installateur me signale que ce sont des prérequis par Victron pour un fonctionnement optimal.

Dans ce cas pourquoi alors que mes panneau produisent peu, que mes batteries sont pleines, il arrive que cette valeur soit 10 fois supérieure (200W).

1720091436888.png

puis-je passer cette valeur à 0W ? Quelle est la raison de ces 20W exactement ? Quel risque pourrait il y avoir si toutefois je passe cette valeur à 0W ?


Cordialement

ESS
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7 Answers
Duivert NL avatar image
Duivert NL answered ·

hi ESS will try to keep the grid setpoint around the value you set there, so when you put it at 20W it will balance arond that number, so it can be higher at times and lower at times


if you are not allowed to feedback to grid, set it higher

if you are aloowed to feedbcak to grid set it lower (or negative, but then batttery power also feed grid)


it will never be zero...

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Haze Hell avatar image
Haze Hell answered ·

what's the point of setting it higher?

i don't send electricity back to the grid


and why can't I set this value to 0?

I don't understand why the inverter is drawing power from the grid when my panels aren't working at full capacity and my batteries are full.


Thanks for your answers

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Duivert NL avatar image Duivert NL commented ·
You can set it to 0, but it will always try to balance around zero


Are you not allowed to feed to grid? If you can you can set it negative

What kind of pv do you have mppt? Or ac inverter on ac out of inverter?

Another option is to set ignore AC input in ve configure

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Haze Hell avatar image
Haze Hell answered ·

the dealer tells me that Victron gives this setting and advises me not to change it.

it's the latter who invites me to ask the question here


PV: TSM-435_NEG9R.28Solar panel 435Wp - BIVERRE - NTYPE - Vertex S+ - TrinaSolar Vertex

Inverter: QUA481030010 Inverter-charger 10000VA 48V 140-100/100 Quattro-Victron Energy


my installation is designed so that I don't send surplus energy back to the grid, but remain connected to it if I exceed the inverter's 10KW capacity.


If I set it to 0, logically it should consume less than it does now?

because it's currently balanced around 20W if I've understood correctly.


Why is it that when Victron trains dealers, they are told to set this grid setpoint to this value, and why does the dealer tell me that I shouldn't change this setting?



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nickdb avatar image nickdb ♦♦ commented ·
Your dealer doesn't appear to understand the product very well.

It is adjusted on most installations.

There are many topics on this very subject that you can search for and get more detail.

In short the inverter is synced to the grid so power is always flowing backwards and forwards around the setpoint.

It will try get to the setpoint but ultimately this is affected by loads, your installation and grid quality.

If yours is pulling too much, lower it.

An ESS can never have a net zero usage, the system does not work that way.

If that is what you want, you can configure the system to disconnect from grid automatically, which solves that issue.


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Haze Hell avatar image
Haze Hell answered ·

thanks dudes for answers

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dragotog avatar image
dragotog answered ·

bonjour le multiplus ne gère pas instantanément le niveau suivant un gros consommateur qui s'arrête ou démarre ; 20w mini personnellement en été pour évité l'injection la nuit, de plus si l'injection pas autorisé une valeur négative risque de poser problème.

le set point sera aussi utile de le monter en hiver pour éviter de vider trop les batteries les jours bien gris consécutif si pas un dimensionnellement de fou.

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Haze Hell avatar image Haze Hell commented ·
je ne comprends pas tout dans votre réponse,

le set point n est pas lié au % de sécurité des batteries (SOC) (réglé à 15% chez moi)

j'ai testé de passer le point de consigne à 0W, effectivement ça consomme toujours, mais moins

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yann avatar image
yann answered ·

Le point de consigne réseau, c'est ce que le système ESS va essayer de conserver au niveau du point de mesure du réseau de votre système. Si il est positif, vous consommez, si il est négatif, vous injectez.


La consigne à 20W, c'est pour limiter les risque d'injection "parasite" car l'ajustement de la puissance produite par le multiplus n'est pas instantané, et quand la consommation de la maison diminue d'un coup. Par exemple une bouilloire électrique qui s’arrête, pendant un moment la production du multi sera supérieure à la consommation, et il va y avoir une injection. Plus le point de consigne est haut, plus cette injection parasite sera faible et limitée dans le temps.

Par contre effectivement, du coup vous aurez toujours une consommation minimale sur le réseau de 20W (ou autre valeur selon le réglage) qui ne sera pas compensée par le système ESS.

Si le fait d'injecter momentanément ne pose pas de problème particulier, vous pouvez tout à fait régler cette valeur à 0.

Évitez de le mettre en négatif car alors vous aller injecter en permanence (même la nuit en prenant l'énergie dans les batteries) puisque alors le système va ajuster la production pour coller à la consigne.

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lifeingalicia avatar image
lifeingalicia answered ·

It is a grid driven reactive system. Grid voltage, frequency, distortion and demand are constantly shifting.

Processing power / cycletime is a limiting factor. Forward demand is unknown. Even with the fastest processor and optimized programming once calculated it has already changed. Thus to balance the system will always incur a slight under/overshot.

20 Watt is more or less within the fault tolerance of most counters making it a preffered setting.

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