Hi all,

The deye/sunsync inverters time of use setting, each time slot has a "power" column, is this power column only for battery charge power? Not discharge?

My time of use setting is attached. As seen, I do not charge via grid nor gen. I only charge via solar, so I leave the check boxes for grid/gen empty. Using it this way lets me put in the battery percentages at which I switch to grid consumption. It works well.

My only issue is, say at night time there is no solar. Say I am at slot "Time 4" and it is 7pm. Say my battery is 90%. Now I set the "power" column to 900 because I want my battery to supply 900w. If my house is using 1.5kw, then I want my battery to supply 900w and the grid to supply the remaining 600w.

Setting the 900w in the "power" column with 90% battery does not restrict the battery to 900w though, it ends up supplying all 1.5kw my house is using.

Is the "power" column only for charging and not for discharge?

Thanks.

This is unusual. The "Power" column specifically restricts the amount of power supplied from the battery. Try to change the end time for that slot, ie. don't let your time slots all end at 00:00, split it up to end say at 9pm for Time4, then end at 10pm for Time 5. No guarantee that this will resolve the issue, but I've got a similar setup that also limits my power drawn at various times in the evening (eg. when my geyser timer is running), and it works well like that. Maybe double-check that the system time on the inverter is perfectly correct, although looking at your screenshot and posting time, it might not be the real issue either.

Thanks, I will try changing the time slots so none have the same values anywhere.

So if you set "power" column to 0, it pulls full load from the grid even though battery soc is higher than percent in that time slot?

3 hours ago, H1771 said:

Thanks, I will try changing the time slots so none have the same values anywhere.

So if you set "power" column to 0, it pulls full load from the grid even though battery soc is higher than percent in that time slot?

Please try that for yourself and let me know. The last time I did that I had a residual usage of around 50-60W from my battery, but I may well have issues with inaccuracies because of my CT-coil cable length.

If you set it to zero and really get exactly zero, I'd love to know.

Hi,

Ah okay so then it did work for you, 50-60W is just as good as zero

I've set all my time slots power field to 0, I will see tonight what it does.

Thanks.

It does work 😁

After setting all to zero, battery is at 95% in the morning. So it used the grid the whole night.

Not sure why when I tried it yesterday I could not get it to split between battery/grid, maybe it takes some time to take effect after changing the setting and I was being too impatient.

Thanks for the replies, sorry for the noise.

This has been my setup since Day 1 with loadshedding at its peak.

Haven't changed the system at all. Uses battery for the house all night and then solar when the sun comes up.

MdF

Any reason you don't drain lower than 40%? Most lipo batteries these days have discharge depth down to like 10%.

Your power values for all time slots are max for your inverter. My use case is a little different. At night after dinner all the way to 6am, my house base load is about 1kw or less. But as it's winter and I have someone that is ill in the house, I keep an aircon on through the night, what I was trying to do is set the power value to 1kw, to let the battery supply the base load, but when the aircon comes in, the grid can supply it. This is my use base for wanting to split the supply between battery/grid.

2 hours ago, H1771 said:

So, there is no real reason for 40% other than the installer was happy that that value should be fine for our usage. And those power settings have worked fine for us.

TBH, have not done much tinkering with the system since installation as all has worked fine for our usage.

MdF

2 hours ago, H1771 said:

Any reason you don't drain lower than 40%? Most lipo batteries these days have discharge depth down to like 10%.

Your power values for all time slots are max for your inverter. My use case is a little different. At night after dinner all the way to 6am, my house base load is about 1kw or less. But as it's winter and I have someone that is ill in the house, I keep an aircon on through the night, what I was trying to do is set the power value to 1kw, to let the battery supply the base load, but when the aircon comes in, the grid can supply it. This is my use base for wanting to split the supply between battery/grid.

Edited yesterday at 09:541 day by MdF