Mike's (non-Sunsynk) System

hj2k_x said:
I see there are also larger inverters even. Like 12kw upwards. But maybe it would make more sense to them do one 8kw and one 5kw if it's really going to be an issue.
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In this case the important numbers are your peaks - if you won't be exceeding 11kW then the 8kW should be more than fine. You can always go for a bigger inverter, but it's quite a pricey solution. Obviously with two households that does become more of a consideration.
 
The sunsynk/deye does DC from solar to 48v DC to batteries.

I've had my solar panels generating at over 10kw with most going to the loads and back to the grid in the form of DC to AC inverting and then the balance going to solar high current DC to battery at 48v DC. 20211207_113627.jpg20211127_114957.jpg
 
AchmatK said:
The sunsynk/deye does DC from solar to 48v DC to batteries.

I've had my solar panels generating at over 10kw with most going to the loads and back to the grid in the form of DC to AC inverting and then the balance going to solar high current DC to battery at 48v DC. View attachment 1248532View attachment 1248534
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Interesting to see that, as expected, the inversion maxes out at 8kw on the button.
 
Speedster said:
Interesting to see that, as expected, the inversion maxes out at 8kw on the button.
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Yep. I think I've only ever seen it go a few watts over 8kw from DC to AC and only for a second or two. Too quick for me to take a pic.
 
Speedster said:
In this case the important numbers are your peaks - if you won't be exceeding 11kW then the 8kW should be more than fine. You can always go for a bigger inverter, but it's quite a pricey solution. Obviously with two households that does become more of a consideration.
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Yes. I suppose its weighing up whether there are doing to be times that the total load is 11kw. I'm thinking of very hot/cold days with washing machines, tumbler running at the same time as a couple of aircons, plus base load, then someone decides to boil a kettle or two...
 
hj2k_x said:
Yes. I suppose its weighing up whether there are doing to be times that the total load is 11kw. I'm thinking of very hot/cold days with washing machines, tumbler running at the same time as a couple of aircons, plus base load, then someone decides to boil a kettle or two...
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I would start off moving the high load culprits to non essential - geysers, ovens, pool pumps etc.

You can use excess PV to power these during the day if your CT coil is wired correctly.

Monitor for a few weeks/months and see what sort of peaks you're getting.When you're ready you can start moving them back onto essentials. In the past week I haven't personally seen a peak load higher than 3.5kW, meaning I have 4.5kW to spare and can probably move my geyser and oven back and still be safe.

Just note that you'll need to get the installer to come and switch things to essential for you because it's not a switch that you can toggle, it's physically wired that way from the DB board. So you need to be fairly certain about what you want on non-essentials and then again when you want stuff moved to essentials later on...
 
Mike Hoxbig said:
I would start off moving the high load culprits to non essential - geysers, ovens, pool pumps etc.

You can use excess PV to power these during the day if your CT coil is wired correctly.

Monitor for a few weeks/months and see what sort of peaks you're getting.When you're ready you can start moving them back onto essentials. In the past week I haven't personally seen a peak load higher than 3.5kW, meaning I have 4.5kW to spare and can probably move my geyser and oven back and still be safe.

Just note that you'll need to get the installer to come and switch things to essential for you because it's not a switch that you can toggle, it's physically wired that way from the DB board. So you need to be fairly certain about what you want on non-essentials and then again when you want stuff moved to essentials...
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Thanks for the tip.

Been doing some reading about CT coils. They seem pretty important also.
 
Snyper564 said:
This is the reason we went 8kw use as you want don't have to think abt it. As I said we have everything in essential
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This is exactly what Im planning to do, I built the house with energy efficiency in mind so everything will be in essential and I wont need any restrictions.
 
hj2k_x said:
Thanks for the tip.

Been doing some reading about CT coils. They seem pretty important also.
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Definitely on Sunsynks / Deye. Not sure about other brands (Victron / Alpha / Axpert)

Thanks for the correction all... 16kw
 
Mike Hoxbig said:
I would start off moving the high load culprits to non essential - geysers, ovens, pool pumps etc.

You can use excess PV to power these during the day if your CT coil is wired correctly.

Monitor for a few weeks/months and see what sort of peaks you're getting.When you're ready you can start moving them back onto essentials. In the past week I haven't personally seen a peak load higher than 3.5kW, meaning I have 4.5kW to spare and can probably move my geyser and oven back and still be safe.

Just note that you'll need to get the installer to come and switch things to essential for you because it's not a switch that you can toggle, it's physically wired that way from the DB board. So you need to be fairly certain about what you want on non-essentials and then again when you want stuff moved to essentials later on...
Click to expand...
Learnt much this padawan has .... talented he is
 
Mike Hoxbig said:
I would start off moving the high load culprits to non essential - geysers, ovens, pool pumps etc.

You can use excess PV to power these during the day if your CT coil is wired correctly.

Monitor for a few weeks/months and see what sort of peaks you're getting.When you're ready you can start moving them back onto essentials. In the past week I haven't personally seen a peak load higher than 3.5kW, meaning I have 4.5kW to spare and can probably move my geyser and oven back and still be safe.

Just note that you'll need to get the installer to come and switch things to essential for you because it's not a switch that you can toggle, it's physically wired that way from the DB board. So you need to be fairly certain about what you want on non-essentials and then again when you want stuff moved to essentials later on...
Click to expand...
Learnt much this padawan has .... talented he is
 
Rocket-Boy said:
This is exactly what Im planning to do, I built the house with energy efficiency in mind so everything will be in essential and I wont need any restrictions.
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Yeah our Siemens fridge takes 30w an hour and induction stove is also super efficient. Even turned the TV on eco mode.

My wife basically didn't even want to know that anything was different.

Only thing we do is run dishwasher in the morning
 
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WhyME said:
Question on PV panel roof mounting kit for IBR Clip Lock roof. Which one's can I use ? Cost ?

My installer has quoted R8500 to mount 16 panels (455w Canadian Super High Power Mono)
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If you have IBR, try to avoid rails, they are expensive.
Renusol Metasole+ / Seam Clamp KL+ with Renusol middle and end clamps seems to be more cost effective than the Schletter equivalent.
 
AchmatK said:
Yep. I think I've only ever seen it go a few watts over 8kw from DC to AC and only for a second or two. Too quick for me to take a pic.
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Interesting.

I have a screenshot of a 5.5K Sunsynk with 5.88kWp panels, pushing 7.79kW production, 89 W to battery, 1.22kW to load and a whopping 6.24kW to grid. And it is sustained, day after day in clear sky conditions, not just momentarily. The inverter is installed at the coast in the Eastern Cape, and the panels get a cooling sea breeze over them.
So two takeaways from this: the 5.5K Sunsynk is capable of inverting 7.46K with ease and still charges batteries simultaneously :cool:, and the other is that it is very important to size the panels correctly for the dreaded 500V, one never knows what conditions are possible.
I'd post it, but I don't have permission from the owner and I would rather not get friends into trouble.
 
hj2k_x said:
Fair enough. This is my washing machine, plugged into a smart plug which monitors power usage. Is the current power figure one the relevant one? Is that 2143W?
emoji22.png
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Yep. Anything that heats water/food will chow power. It's actually not too bad, mine chomps 2400W.

hj2k_x said:
I did only peak at that for a little while.

It's meant to be an energy efficient Bosch. And the overall usage figures would support that idea.

But those high peaks is why I was worried about total peak load at any given stage.

If each household runs a washing machine and then boils a kettle, it doesn't look too good for peak load...
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The spikes are actually only for a few minutes. I just stagger the dishwasher and washing machine, especially when the heat pump is on.

hj2k_x said:
Indeed. I suppose I'll have to work it all out. See if I need to keep some large appliances on the grid side just in case. Pretty sure these aircons, while very efficient overall, peak pretty high as well. Going to be using them to heat in winter also.
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Yes, it's actually easier in practice. You will also have the challenge of educating household members.
hj2k_x said:
Yes. I suppose its weighing up whether there are doing to be times that the total load is 11kw. I'm thinking of very hot/cold days with washing machines, tumbler running at the same time as a couple of aircons, plus base load, then someone decides to boil a kettle or two...
Click to expand...
Aircons, tumble dryer and geyser / heat pump can go on non-essentials, and the latter can be scheduled because hot water retains its heat for quite long. Although I moved to a gas kettle, I actually still have my old electric kettle, it is useful for experimentation when I need a load.

It's been 17 months for me and I'm still optimising small things, counting watts here and there :D
 
RonSwanson said:
Interesting.

I have a screenshot of a 5.5K Sunsynk with 5.88kWp panels, pushing 7.79kW production, 89 W to battery, 1.22kW to load and a whopping 6.24kW to grid. And it is sustained, day after day in clear sky conditions, not just momentarily. The inverter is installed at the coast in the Eastern Cape, and the panels get a cooling sea breeze over them.
So two takeaways from this: the 5.5K Sunsynk is capable of inverting 7.46K with ease and still charges batteries simultaneously :cool:, and the other is that it is very important to size the panels correctly for the dreaded 500V, one never knows what conditions are possible.
I'd post it, but I don't have permission from the owner and I would rather not get friends into trouble.
Click to expand...
That is interesting.

I would expect the DC to AC to be capped at 5kw like mine is capped at 8kw with the balance going to batteries in DC to DC.
 
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