Prioritze Solar charging when using "Ignore AC Input" option

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denzel asked Oct 7, '19

Prioritze Solar charging when using "Ignore AC Input" option

Good Day,

I have a simple outcome,

Use solar to power up loads and charge batteries when available and if the loads go higher than X W amount use the grid .

Now using VS options doesn't allow you to use Assistants.

With the below I achived the following :

If the loads are > 1500W for 2seconds the Grid kicks in.

If the loads are < 800W for 2mins the battery AND solar takes over.

The battery conditions work as stated below as well.

Now the issue is :

When the grid is NOT required the system is using nearly 50% from batteries and 50% from solar (+-) .

When the batteries reach < 50% the batteries are charged from the Grid rather than the Solar.

PS : My solar array produces about 1600W

How can I maximize the use of the solar ?

MPPT Controllers battery charging solar virtual switch

1570475392558.png (47.7 KiB)

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denzel commented · Oct 08, 2019 at 05:55 AM

Here is an example

AC loads 316W

PV 326W

but you will see its using -186W from the battery still.

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Modifications Space

Node Red Space

Answer 1 · 2019-10-08T07:48:03Z

Elimac answered · Oct 08, 2019 at 07:48 AM

Hi,

Two small things come to mind to improve a little, not solve to 100%...

- You can set the PV Charger voltage slightly above the settings of Multi charger (100 or 200mV). But in bulk phase you might not notice much improvement...

-You can make use of AC input current limit and enable Power Assist. By doing this, if the AC is not enough to power AC loads, Power assist will "mix" Solar/battery/ and ACin. Not perfect, but might help.

I think ESS has other possibilities, but I'm no expert in ESS, I can't use it as of now.

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