7 minutes ago, Tariq said:

@phidz, is this on essential or is it combined ( essential AND non-essential loads )

Just on essential loads. 

ok, makes sense, fortunately, my essential loads are less than 5 kW

Edited September 20, 20214 yr by Tariq

I have never actually tested this on my unit but it should be like Achmat said @ 35 amp passthrough. Maybe update firmware and check again ? 

Does that mean that i should be able to pull about 7.7KW on the essentials side before it trips?

Theoretically yes.

Just now, Nexuss said:

Theoretically yes.

ok thanks, i will test today and update this thread with my findings.

I have just done the test on my inverter and it tripped when the AC load was at 7.26KW, Grid power was 2.23KW. As suspected the solarman app did not update quick enough to capture the correct load when the inverter tripped.

Would a automatic transfer switch help with preventing the house from being temporarily out of power when the inverter trips?

looks like you need two in parallel or an 8 kW inverter 😉😉

Or just move something from essential side to non essentials, it sounds like you are running too much on the load side . You should ideally  try to keep the load on essential side as low as possible , only absolute essentials. 

1 minute ago, Tariq said:

looks like you need two in parallel or an 8 kW inverter 😉😉

😃 i think it's cheaper to put oven on the grid. In the long run, i will have to go your suggested route. I also increased the power field on system settings from the 5000w to 5500w, not sure if it had an effect.

3 minutes ago, Nexuss said:

Or just move something from essential side to non essentials, it sounds like you are running too much on the load side . You should ideally  try to keep the load on essential side as low as possible , only absolute essentials. 

agreed, will have to call back the installer to further split the db

i have all the lights and plugs plus one aircon (only run it when grid or pv is available )on the essential side , two geysers, washing machine,tumble dryer, dishwasher/pool pump on non-essential, works great.

On 2021/05/25 at 12:52 PM, Achmat said:

Incorrect 

Pass through is on the essential side. 

If the grid or another ac source is available then you can pull up to 35A on the 5kw and 90A on 8kw essential side. 

No ,this is not true. When you program your minimums say 80% that means battery wont be used lower than 80% and the grid will then feed those loads on the essential side without any inverting ie passthrough. Don't overload your essential side of the invertor it will handle peaks which i suspect you guys are experiencing ,but not for long periods and will trip.If you are looking to supplement the grid then look at peak shaving settings but again 8kw is 8kw klaa. Just installed 2x8kw maxed out with 2xFreedom Won 15/12 and have hit it with everything incuding the kitchen sink and it will ac overload when it is inverting and you are above spec

8 hours ago, LouisRamsey1 said:

No ,this is not true. When you program your minimums say 80% that means battery wont be used lower than 80% and the grid will then feed those loads on the essential side without any inverting ie passthrough. Don't overload your essential side of the invertor it will handle peaks which i suspect you guys are experiencing ,but not for long periods and will trip.If you are looking to supplement the grid then look at peak shaving settings but again 8kw is 8kw klaa. Just installed 2x8kw maxed out with 2xFreedom Won 15/12 and have hit it with everything incuding the kitchen sink and it will ac overload when it is inverting and you are above spec

Hi Louis. 

This is not correct. The 8kw and 5kw limitation is purely a DC to AC limitation. The passthrough function is AC to AC so on the essential side, when the grid is available, the 5kw can peak at 8kw and the 8kw can peak at 12kw. Definitely will not overload as the balance is drawn from the grid. 

3 hours ago, Leshen said:

Hi Louis. 

This is not correct. The 8kw and 5kw limitation is purely a DC to AC limitation. The passthrough function is AC to AC so on the essential side, when the grid is available, the 5kw can peak at 8kw and the 8kw can peak at 12kw. Definitely will not overload as the balance is drawn from the grid. 

That's the input I'm looking for. 

My question was: 

I have the 5K with 2 x AM2s 

Whole house is on essential except for the geyser. We have gas for everything that would traditionally draw heavy loads. 

What happens when my house needs 7kwh at a time during the day where my PV and grid is available? A Saturday comes to mind where the lawnmower will be used off of the essential plugs. (I do have a non-essential plug outside that can always be used.)

Am I limited to a max draw of 5kwh at all times on the essential circuits? From the above I can peak for prolonged times at max 8kw? Will this have a negative impact on the inverter over the long run? 

As I understand it, yes, as long as you have grid. The only thing is that there was a video regarding input relays getting welded shut at high currents

15 hours ago, Leshen said:

Hi Louis. 

This is not correct. The 8kw and 5kw limitation is purely a DC to AC limitation. The passthrough function is AC to AC so on the essential side, when the grid is available, the 5kw can peak at 8kw and the 8kw can peak at 12kw. Definitely will not overload as the balance is drawn from the grid. 

Exactly what is Dc to Ac ?it means it's inverting and is limited to 8.8kw and some period of peak. Ac to Ac is passthrough so I don't understand .It doesn't mean supplement or blend grid with a maxed out inverting invertor or like you say DC to Ac.Litrature states passthrough not supplementing or blending.Passthrough of an alternative Ac supply

 

19 minutes ago, LouisRamsey1 said:

Exactly what is Dc to Ac ?it means it's inverting and is limited to 8.8kw and some period of peak. Ac to Ac is passthrough so I don't understand .It doesn't mean supplement or blend grid with a maxed out inverting invertor or like you say DC to Ac.Litrature states passthrough not supplementing or blending.Passthrough of an alternative Ac supply

 

I want any Sunsynk guy to show me 4 elements 3kw each on a 8.8kw invertor and some pictures of flow chart and a clamp meter on the grid input. Sorry let's make that 6 elements so we can test the 90amp blending theory

Edited December 13, 20214 yr by LouisRamsey1
Wasn't clear

11 hours ago, LouisRamsey1 said:

I want any Sunsynk guy to show me 4 elements 3kw each on a 8.8kw invertor and some pictures of flow chart and a clamp meter on the grid input. Sorry let's make that 6 elements so we can test the 90amp blending theory

What exactly are you unclear about? There is no 90A passthrough on the Sunsynk. It's 50A on the 8kw and 35A on the 5kw. The 90A was a typo that has been recently corrected for the SA market. 90A was printed and correct for the 110V market. 

I don't think you quite understand how this inverter works. Maybe the attached pic can explain. 

@Leshen, saw a video by Keith ( Sunsynk ) regarding input relays welding shut at high current levels, an installer posted on another forum, that at the jo'brg Sunsynk installer school they are recommending something like 25 and 35 amp breakers on the input.

Edited December 14, 20214 yr by Tariq

24 minutes ago, Tariq said:

@Leshen, saw a video by Keith ( Sunsynk ) regarding input relays welding shut at high current levels, an installer posted on another forum, that at the jo'brg Sunsynk installer school they are recommending something like 25 and 35 amp breakers on the input.

Hi Tariq.

If you watch the video. Keith is saying that there are users out there that are going beyond the max passthrough current of 50A and 35A which in turn are damaging the relays. 

9 hours ago, Leshen said:

What exactly are you unclear about? There is no 90A passthrough on the Sunsynk. It's 50A on the 8kw and 35A on the 5kw. The 90A was a typo that has been recently corrected for the SA market. 90A was printed and correct for the 110V market. 

I don't think you quite understand how this inverter works. Maybe the attached pic can explain. 

Now it's a typo,why has that not been announced on a bull horn no wonder the relays have welded contacts and breaking down. Now why would you want to use this passthrough function then hit load shedding and boom Ac trip. Again this nonsense about passthrough has got people thinking they can now overload the essential output.If grid goes down then you are restricted to inverting capacity. The example you show above would be equal to at ac voltage 41 amps and the only example I have seen on the forum. I would like to see a video cranking it up to 12kw and just staying there and if it is indeed supplmenting with grid on a maxed out invertor I'll eat my hat.please know that I understand it will blend within capacity but I'm very doubtful on the passthrough as described in this community.Many people including installers are giving different opinions.Pregnant or not pregnant simple.Where is an approved Sunsynk installer to set the record straight

 

17 minutes ago, LouisRamsey1 said:

Now it's a typo,why has that not been announced on a bull horn no wonder the relays have welded contacts and breaking down. Now why would you want to use this passthrough function then hit load shedding and boom Ac trip. Again this nonsense about passthrough has got people thinking they can now overload the essential output.If grid goes down then you are restricted to inverting capacity. The example you show above would be equal to at ac voltage 41 amps and the only example I have seen on the forum. I would like to see a video cranking it up to 12kw and just staying there and if it is indeed supplmenting with grid on a maxed out invertor I'll eat my hat.please know that I understand it will blend within capacity but I'm very doubtful on the passthrough as described in this community.Many people including installers are giving different opinions.Pregnant or not pregnant simple.Where is an approved Sunsynk installer to set the record straight

 

Just to clarify, cos your posts are all over the place. I showed you a picture of my inverter that's maxed out at 8000w DC to AC and the other 1200w is being drawn from the grid ie 9200w total on the essential side and you aren't happy with that scenario as you would like to see 3000w being drawn from the grid?

 

6 minutes ago, Leshen said:

Just to clarify, cos your posts are all over the place. I showed you a picture of my inverter that's maxed out at 8000w DC to AC and the other 1200w is being drawn from the grid ie 9200w total on the essential side and you aren't happy with that scenario as you would like to see 3000w being drawn from the grid?

 

Ok so you have set your 8800 invertor at 8000 which is default. now take your max discharge current on the Sunsynk 8.8 spec sheet is 185 and I know this because I can not set mine to more then that. At nominal voltage mine being 52v this equates to 9620 Watts .In your example you still within spec. When you go over that it will simply switch over to grid and this is now passthrough. Again that's why I need to see it I will do the test myself with ae purely resoative loads and then report.I have a master slave setup so I need to hit over 20kw

4 minutes ago, LouisRamsey1 said:

Ok so you have set your 8800 invertor at 8000 which is default. now take your max discharge current on the Sunsynk 8.8 spec sheet is 185 and I know this because I can not set mine to more then that. At nominal voltage mine being 52v this equates to 9620 Watts .In your example you still within spec. When you go over that it will simply switch over to grid and this is now passthrough. Again that's why I need to see it I will do the test myself with ae purely resoative loads and then report.I have a master slave setup so I need to hit over 20kw