diy solar

diy solar

Newbie from Portugal building a house :)

Yeah, no, sorry for derailing the thread, I just... should have learned by now about countering totally absurd affirmations in this day and age.
One just hopes the age of enlightenment isn't completely dead... but there's really not much hope for that, is there. :·/
No more from me on this subject.
-
 
Thanks for your inputs :)
After doing some maths on consumption I don't think it would be a good idea to go with an inverter that can't load share with the grid at night.
Any recommendations on other inverters that are able to do that? I think the deye ones can but struggling to find them in Europe

Thanks
 
What do you mean by load share at night?

I have all the Victron stuff. You can program certain times it is allowed to take from the grid and you can configure it for more self consumption.
However, I find that the powerassist function, which it is very capable of, is hard to use in combination with the self consumption mode.
 
gonmag8 said:
Thanks for your inputs :)
After doing some maths on consumption I don't think it would be a good idea to go with an inverter that can't load share with the grid at night.
Any recommendations on other inverters that are able to do that? I think the deye ones can but struggling to find them in Europe

Thanks
Click to expand...
there are dealers on swiss, austria and france for deye.
not sure what you mean " cant load share" , i believe my screenshots were pretty clear that basic load sharing isnt a problem at all
 
hummm, I am confused now.

Let me try be clear.
Big Loads that I might want to have simultaneously (night or day) all 230V single phase (Europe).
  • 4KW (electrical)- Heat pump (11KW is the heating power not the electric load)
  • 4KW induction hob (this would be for 2 pots/pans ON)
  • 3KW Oven
  • 2KW Kettle (short duration)
I could list more but the likelihood of them being ON at the same time diminishes.
So given this I might need about 13KW supply at any time.

From What I previously understood (maybe incorrectly) from mrzed001 posts, the Voltronic/Primo Axper/MPP 8KW inverter can not load share when pulling from battery only and it would work in the following way to achieve 13KW:
  • During the day:
    • Produce ~8KW from solar + get remaining ~5KW from Grid
  • During the night:
    • Either Consume 8KW MAX from the battery
      OR
    • Switch the entire load to GRID (13KW)
This is what I meant by these inverters not being able to load share (with grid) at night when pulling from the battery (but maybe they can and I just misunderstood).

What I am looking for is a 5 to 8 KW All-in-One inverter that can:
  • During the day:
    • Produce ~8KW from solar + get remaining ~5KW from Grid
  • During the night:
    • Get 8KW from the battery + get remaining ~5KW from Grid

Hope this is clear and thank you all for your help
 
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Perhaps something is getting lost in the translation? ?‍♂️
It seems simple on the surface.
Produce as much as possible and use the grid for what you can not produce.

I believe the difficulty in understanding is in relation to the load usage scheduling.
Solar systems will produce X amount of power, batteries will store Y amount of power, the house requires Z amount of power.
The goal is to have X = Y which equals Z.

With variable rates in relation to electrical costs, the issue becomes more difficult. Am I correct?
 
gonmag8 said:
hummm, I am confused now.

Let me try be clear.
Big Loads that I might want to have simultaneously (night or day) all 230V single phase (Europe).
  • 4KW (electrical)- Heat pump (11KW is the heating power not the electric load)
  • 4KW induction hob (this would be for 2 pots/pans ON)
  • 3KW Oven
  • 2KW Kettle (short duration)
Click to expand...
Heat pump? Is it 1 phase or 3 phase ?
For 3 phase you need 3 MPP Solar inverter. Or a Deye 3 phase hybrid inverter.

gonmag8 said:
I could list more but the likelihood of them being ON at the same time diminishes.
So given this I might need about 13KW supply at any time.

From What I previously understood (maybe incorrectly) from mrzed001 posts, the Voltronic/Primo Axper/MPP 8KW inverter can not load share when pulling from battery only and it would work in the following way to achieve 13KW:
  • During the day:
    • Produce ~8KW from solar + get remaining ~5KW from Grid
  • During the night:
    • Either Consume 8KW MAX from the battery
      OR
    • Switch the entire load to GRID (13KW)
This is what I meant by these inverters not being able to load share (with grid) at night when pulling from the battery (but maybe they can and I just misunderstood).

What I am looking for is a 5 to 8 KW All-in-One inverter that can:
  • During the day:
    • Produce ~8KW from solar + get remaining ~5KW from Grid
  • During the night:
    • Get 8KW from the battery + get remaining ~5KW from Grid

Hope this is clear and thank you all for your help
Click to expand...

Victron and Deye inverters can do it.

But why do you need it ?
The grid connection is too low Amp? And you have to add your own power to supply your loads ?
This is the only reason I can think where you need this solution.
 
everything is single phase, I don't have 3 phase in the house or supply.

I would need it so I can supply 13KW to the house at night without having to get it all from the grid.
In Portugal we pay a fixed monthly fee based on the max power input from the grid and above 7KW that fee grows exponentially.
So, in effect, like you said "the grid connection is too low Amp" it isn't ... but we pay a lot for it not to be.
 
Last edited:
gonmag8 said:
everything is single phase, I don't have 3 phase in the house or supply.

I would need it so I can supply 13KW to the house at night without having to get it all from the grid?
In Portugal we pay a fixed monthly fee based on the max power input from the grid and above 7KW that fee grows exponentially.
So, in effect, like you said "the grid connection is too low Amp" it isn't ... but we pay a lot for it not to be.
Click to expand...
So, is the goal to ensure your "PEAK USAGE" never exceeds 7kw?
 
Cool, that is an achievable goal.

If you want to accomplish that goal with automation we will work in one direction.
If you want to accomplish that goal manually we will work in another direction.

You pick one.
 
gonmag8 said:
everything is single phase, I don't have 3 phase in the house or supply.

I would need it so I can supply 13KW to the house at night without having to get it all from the grid.
In Portugal we pay a fixed monthly fee based on the max power input from the grid and above 7KW that fee grows exponentially.
So, in effect, like you said "the grid connection is too low Amp" it isn't ... but we pay a lot for it not to be.
Click to expand...

OK. The heat pump is what bothered me. Usually for higher W it is 3 phase.

Then 1 phase Victron inverters can do the trick: MultiPlus II or Quattro. Costs a lot. Needs separate MPPT's too.
Maybe 1 phase Deye inverters (5-8kW) can do it too. Not sure, I have to check it.

Checked, Deye can too :)
Deye_Peak_Shaving.png
 
Last edited:
Brilliant, thank.
Would prefer all in on and not at victron prices.

Will have a look at the deye ones, what is the reliability / support, etc on them?
 
gonmag8 said:
Brilliant, thank.
Would prefer all in on and not at victron prices.

Will have a look at the deye ones, what is the reliability / support, etc on them?
Click to expand...

In US they are sold under the name Sol-Ark.
One of the top sellers :)

In England they are sold under the name SunSynk.

You can buy it directly from Deye (alibaba).
Here is its official page with manuals:

Solar Grid-Tie Inverter Manufacturers, PV On-Grid Inverter | Deye

NingBo Deye Inverter Technology Co.,Ltd is leading solar inverter manufacturer and Grid-tie inverter suppliers, company wholesale PV inverter, On-grid inverter, Grid-tie inverter with our own factory.
www.deyeinverter.com www.deyeinverter.com
 
Been up to this whilst waiting for the electrician to finish the mains breaker panel so i can connect it all :)
IMG_20220714_102044.jpg
IMG_20220714_172200.jpg

IMG_20220714_173451.jpg
 
Last edited:
The roof is at 30 degrees inclination, gained another 5 by making the rear threaded bars 15cm longer than the front ones...
Still not ideal but best I could get without wife telling me its ugly ?
IMG_20220713_083046.jpg
 
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What’s the most relevant solar panel to install on a house’s roof? I’m new to thinking, and I just wonder what panels it’s better to choose. There are not so many sunny days in the area where I live, and I wonder whether it’s relevant.
I just want to slowly move off the grid and become more independent in my consumption. I already grow my fresh food such as potatoes and other vegetables. It’s very nice to have your food, and it would be even better to have my electricity. I want to invite www.sjonessurveying.co.uk to see how well panels would fit on the roof, but I need to understand whether it’s a good idea in general.
 
IMG_20220803_134907.jpg

Slowly getting there

IMG_20220921_140456.jpgIMG_20220926_151102.jpg
Charging station with a 60Amp 3.6v psu.

Got an arduino to do data logging to the laptop and control a relay that shuts down the psu if voltage goes above 3.6
 
I hope you were able to install solar panels according to the guides on YouTube, haha. I would never have been able to do so much work myself in my life, you are a very cool guy, and I hope you will be able to make your dream home. I prefer the simpler option of buying a house. For example, about a month ago, I was looking for a house in Alabaster through this website -- https://www.realtysouth.com/alabaster-homes-for-sale. In the end, I found myself an inexpensive, beautiful, large house in which I need to do a little renovation. Still, I can do it myself, which will be ideal for living.
 
Last edited:
gonmag8 said:
Deye seems to be sold out ... ended up buying a "Turbo Energy"

inversor-hibrido-turbo-energy-48v-5

apparently made by Deye with Deye software but rebranded by a company for the Spanish market.

I hope its a rebrand and not a clone :confused:

Does anyone know ?
Click to expand...
I'm also from Portugal, we have a Deye distributor here, I believe that Turbo Energy is rebranded you can check it installing the mobile app Deye Cloud that is a variation of solarman with the plus that you can connect directly to the inverter and adjust the parameters.
 
mrzed001 said:
Did you never hear of off-grid with grid support systems ?
Many (most in EU) only know grid-tie and separated off-grid systems. And know nothing about other alternatives.
Really EU is 10-15 years behind US in this. Knowledge and some regulations missing too.

An off-grid with grid support and GTIsystems lets the grid through (to the house)
If sun is up then it lowers the grid consumption by the amount the PV system is generating.
You do not need to be able to generate all the power your home needs (separate off-grid) if full UPS mode is not required.

Also 40K € ???? Whaaaat ?
14,4 kWh LiFePO4 is $2700 + BMS $200
An 5kW MPP Solar off-grid (with grid support) inverter costs about $800
An 12kW 3 phase real hybrid Deye inverter costs about $3300
You have a x6 somewhere in your calculation :ROFLMAO:
Click to expand...
The comment re EU US solar is absolute nonsense. Many EU countries are streets ahead. We have all manor of solar grid combinations and typically far bigger grant and subsidy supports too.

We can do on grid , grid tied , hybrid , battery , no grid , full feed through grid

Europe is streets ahead in renewables , US is an old tech country mains /grid in the US is in the dark ages.(?look at Texas ) I haven’t had a grid blackout in 27 years.

In my country EU everything is possible within limits. I don’t need or can be forced to connect to the grid at all. ( unlike many US grids ). Us is streets behind in renewables.

Note the EU is a big place hence making such sweeping generalisation as you did is nonsense.
 
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