Load first or battery first?

[Mike Hoxbig]

How do you guys have your inverters configured to use your PV in the morning?

I've had mine on battery first for about a month and noticed that everything gets sent to charging the battery, and grid powers the load while this is happening.

With load first it would seem more efficient. Batteries take longer to charge but you're not drawing from the grid. This could be a problem on cloudy days.

Has anyone done some long term tests on which is more efficient over the long haul? I'd prefer to set it and leave it, and not have to manually change it depending on weather...

 

[Mzezman]

Mine is load first, and yes it does impact battery charge on days like today...yesterday i ended the day on 85% as it was overcast but i didnt use any grid even with some higher loads (geyser)

 

[BadBoyGP]

Read the same...

Load first...
There is a guy on YouTube called Dr. Solar.

 

[Steijn1]

Same.
Priority is the load.
If my battery is not fully charged by midday then the grid is used to bring them to 100% for the night.
Seems to work perfectly on most days

 

[Saba'a]

Load being essential; non-essential or full load?

Mine is load priority BUT with CT coil issue load seems to be non-essential only.

 

[Koosvanwyk]

Load being essential; non-essential or full load?

Mine is load priority BUT with CT coil issue load seems to be non-essential only.

It will be full load including essential and non essential

 

[Magnum]

Battery first. All load disabled until solar is sufficient to bring load back online.

 

[Snyper564]

I always do load first then battery - GRID is always my last option. Want to use as little or even better none if possible.

The only time I change this possibly is when there is load shedding then battery is top priority

 

[Zerc]

Load first but also setup so that batteries must be at least 40% charged at 10:00 and 75% at 17:00 even if it means charging them from the grid. This is to ensure that I have enough energy so if there is cable theft or other issues I
will be able to continue powering the house through the night.

 

[Tacet]

The battery first, load second, idea probably comes from VRLA batteries that really doesn't like to be partially discharged for extended duration (plate sulphation being the risk). With lithium that is less of an issue.

 

[Hd7]

Load first for me, usually have my moderate load appliances kick in from the morning (pool pump, washing machine etc) while the production is still ramping up. Then ask my panels to run the geysers during peak pv and send surplus to the batteries. I've never started an evening with less than 90% so pretty happy with it

 

[EABeneke]

Same.
Priority is the load.
If my battery is not fully charged by midday then the grid is used to bring them to 100% for the night.
Seems to work perfectly on most days

Hi there, do you manually tick the time slot for the Grid to fill up the remaining battery %? Thank you!

 

[Steijn1]

Hi there, do you manually tick the time slot for the Grid to fill up the remaining battery %? Thank you!

Hi, I am not sure if I understand your question.
Yes, I have certain time slots ticked for the grid to fill up the better if required.
I am not sure what you mean by "manually".

 

[SauRoNZA]

So I switched to battery priority with the rain just for shits and giggles.

Seems it’s only applicable up to your reserved SOC on the Sunsynk after which it just goes to load first anyway.

Would therefore only be of any real use if you didn’t charge from grid.

May be that it limits discharge from battery, but not quite sure on that just yet.

 

[RonSwanson]

Always load first. Batteries can eat cake. They have the whole day to charge.