Wind and sun priority settings wrong?

DIY
, ,
1

Up to now i have two client systems set to wind and sun priority.
However, both the systems keep the batteries charged all the time unless i set ignore AC.
The problem with that however is that AC2 out (non essential loads) is disconnected too, so no oven, boiler etc. which is not the intention of the system.

I might have set something wrong?

System 1 Lead Semi Traction

WindSun2
WindSun2636×501 14 KB

WindSun3
WindSun3634×499 18.8 KB

System 2 Lead AGM
WindSun4
WindSun4643×505 20.8 KB

WindSun5
WindSun5643×505 27.2 KB

Any advise?

2

In what state are the systems ?

Bulk
Absorp
Float
Sustain ?

Do you have a cerbo or the like connected

Do you have a smartshunt

3

Hi Ed.
At the moment you have them set up like you might a UPS system. So you really need to define what you want to do.
You can still use Ignore AC, but then enable ACOut2 with the onboard Assistants. Could be done various ways, like with an external switch, SOC or V level, etc. With time limits even.

Programming that is the easy bit, working out what you actually want to do might require some thought.

4

Hi Ludo,
To answer your questions:

  • Sustain,
  • Cerbo MkII
  • The first system a BMV and the second system a Smartshunt
5

Hi @JohnC ,
I do not understand why it looks like a UPS system.

I very value your input, but struggling through the settings trying to find out what actual is possible is really not the easy bit.

What i want is a system (on a ship) that uses the solar panels to charge the batteries as much as possible, So that brings me to wind and sun priority. The system is connected to the grid (shore) most of the time. Most loads are connected to AC1 out and some big users are connected to AC2 out to prefend them to discharge the batteries when sailing.
So i want the system

  • To not charge the batteries (until sustain voltage or a SOC if possible or by the user by pressing load battery to 100% on the Cerbo), to have some headroom for the solar energy to be used
  • To use the shore power (when connected) on AC2 out and on AC1 when needed (> a certain amount of power)

I switched on dedicated ignore AC to start with, then i cannot use any Assistant anymore.
Maybe with Nodered?

6

What is the function of the cerbo ?

7

Set Virtual Switch to Off. Assistants will then be available, they’re similar but more powerful. Some ‘possibilities’…

*Set IgnoreAC to ON when SOC >80% (say), and/or >V.
*Set ACout2 ON via a manual switch or a Cerbo relay wired across to Aux relay on the Multi.
*Set Charge Current between 2 values using similar wiring. Or even feedback wiring from the Multi using SOC/V.
*If all loads were on ACOut1 then ACIN could be switched on total load.
*Or a combo of all (with care).

There’s likely other options too, but this is where you need to put in the thought time. And experimenting.

The Sustain option gets a bit mushy when you get down to the detail and system dynamics. And the detail you can have a say about with Assistants.

8

Thanks, this looks very good, i am gonna try things. Thanks

9

@Ludo
Hi,
I don not quit understand your question.
The Cerbo is used for a lot of functionality. You can read what the Cerbo is capable off in the manuals i guess.

10

Did you read the manual?

This feature only applies to DC loads, AC loads are still supplied from the grid.
After 7 days of permanent grid connection the system charges the batteries to 100%.

11

I know what the cerbo can do, but i don’t know what you are doing with the cerbo.

The cerbo is perfectly capable of ignoring most settings you made in the mp, so we need to know what you have programmed