Latest 8KW Deye Hybrid Inverter

16 x 595 JA Solar Panels
1 x Volta Stage 4 Battery 14.2KW

I have a load of 5KW for office and computers, and 2KW load for geyser which makes my total load 7KW.

I am trying to determine the charge settings to charge my battery if it can be 40A so that would be 2,2KW. When I look at the Deye front interface it has 8.0KW max symbol for solar PV input... I am worried something might be wrong.

Please advise. As if the load is 5KW + 2KW when geyser kicks in that's 7KW, then if the battery is charging at 2.2KW that makes 9.2KW?

Am I getting confused can I pull as much PV through the inverter as possible to charge the battery NOT from grid as I am using the Time of Use settings to 20% no grid charging and no generator charging.

Please advise.

Set the grid charge setting to 70A so that it uses more available PV. Can someone please confirm what I can set the maximum charge current to through the 8KW Deye for the Volta Stage 4 battery to charge from PV only.

@ARC Lighting ,

You are able to set the Charging Amps to say 70 or up to 190A's Max, but you need to remember a few things:

1) You need to back that up with enough PV (MINUS your LOAD at that stage). Hence I would also suggest you make sure the inverter is set to Battery Priority. You have approx. PV = 9000W (after losses) available.

So with a 5kW load, that leaves only 4kW to go into the battery. That's only 77A worth of current, and it's only available for a few hours around midday, let along a cloudy day like today.

Adding the 2kW Geyser bring the CA down to 38 A. It's going to take a long while to get that Battery to 100%, if at all.

2) Taking the size of you battery in consideration, I would set the CAmax to 60A (20A per 5 kWh, purely from a longevity perspective. You do want to make them to last 10+ years, I hope !

13 hours ago, Sidewinder said:

@ARC Lighting ,

You are able to set the Charging Amps to say 70 or up to 190A's Max, but you need to remember a few things:

1) You need to back that up with enough PV (MINUS your LOAD at that stage). Hence I would also suggest you make sure the inverter is set to Battery Priority. You have approx. PV = 9000W (after losses) available.

So with a 5kW load, that leaves only 4kW to go into the battery. That's only 77A worth of current, and it's only available for a few hours around midday, let along a cloudy day like today.

Adding the 2kW Geyser bring the CA down to 38 A. It's going to take a long while to get that Battery to 100%, if at all.

2) Taking the size of you battery in consideration, I would set the CAmax to 60A (20A per 5 kWh, purely from a longevity perspective. You do want to make them to last 10+ years, I hope !

Okay, I will change the charge current to 60A instead of 70A.

Why should I change the settings to Battery Priority instead of Load?

13 minutes ago, ARC Lighting said:

Why should I change the settings to Battery Priority instead of Load?

I would not, I'd set the charge current to somewhere around 120 to 140A and set solar priority to load. Not sure why you run the HWC off the inverter, I'd hope its on the non-essential side, so if the grid goes up in smoke, the HWC is off as well.

Your computer load is that measured? Calculated based on PSU rating? or how, surely they do not draw 5kW flat line consumption, so if that is peak consumption, then you probably have some headroom at times which will be added to the battery charge, assuming it is not sitting at your set current limit already.

Note that setting the charge current for the battery to, let's say 140A, puts a limit of 140A as the maximum charge current, not forces the inverter to somehow come up with 140A of charge current out of nowhere to put into the battery, mostly it will likely charge at a much lower rater, as long as you prevent the battery from being charged from both solar as well as the grid.

Okay will set to 120A.

What is HWC?

I run four offices of computers, CCTV's server cabinets and factory lights. Which literally flat line uses 4.93kW/H. See graph below. When the consumption spikes that's when the geyser kicks in to warm up.

Edited March 4, 20251 yr by ARC Lighting

30 minutes ago, ARC Lighting said:

What is HWC?

Only here in South Africa people refer to a Hot Water Cylinder as a Geyser and half the time screw up the spelling... so the Hot Water Cylinder if its an electric one, ideally should form part of the non-essential side of the inverter....

Okay, so I should remove the HWC and rather replace that with something else...

Let me have a look to see what other equipment I can put on it. Most of our motors and machines are 3P.

We do have chop of saws and other grinders that use 230V single phase supply.

1 hour ago, ARC Lighting said:

Okay, so I should remove the HWC and rather replace that with something else...

Not necessarily, the inverter has a UPS/essential load side, which all your computers and critical devices should connect to, those that should run, even when the grid disappears, then the input side from the grid is the non-essential side, which the inverter can also supply power to, but only when the grid is available. So normally (not my scenario, since we have no grid connection), you would only run devices which you cannot do without and which the battery can supply enough power to, when the grid goes south and there may be cloud cover, so not much coming in to help the battery keep things running, on the UPS/essential side.