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inverter
#1
So i am not even out of the "harvesting and testing" section yet.
But i would like some advice on inverters.

I would like to have an inverter that uses my powerwall FIRST.
If the powerwall runs empty/low it must switch on to the grid, and back on the wall when the powerall is nearly 80% full again
The continuous power consumption will be in the first setup 600w an hour 24/7.(pound)

Those ones of vectron seems nice, but won't do the job.(first powerwall and then grid)
On internet they do the job, but if you are in the store and ask them directly, they say its not possible, that they will charge also youre bank....from the grid.......
Why the heck i want those solar panels for.......but oke.

There are cheaper mppt inverters(not pwm) i can buy 3 for the same money.

BUT i also have in mind to just buy a mppt controller and a off grid inverter that will suit my demand.
That off grid inverters are cheaper and more durable.
BUT (yes again but), they switch off when the power is low, and there is no more power to the pound.

When i was younger i had a schematics of a device that would swits between 230ac and 230 ac.
Just for the "must have/really want to have back", does anyone have a schematic or thing like this.
I could not find it on the net, maybe i used the wrong words?
So maybe this will be an good solution?

Anyway i dont see the forest anymore due to all the tree's, like looking for wood in a forrest( i am a carpenter by trade)

Anyway this jibber jabber reflects that i am really swimming in the dark.
powerwall must be drained first to 21v (3v a cell)max (24v system wanted to start with)
then get power from the grid, then when the powerwall is coming up again, cut off the grid and use powerwall again.
Is there such device in existence?

Any help and advice is greatly appreciated, thanks in advance
Still learning English. Learning Li ion and solar technology.

1400 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
2600 waiting for testing.
approx: 500 cells not safe for use: dead, heaters, to high ir or sd

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
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#2
A Victron system will do what you want.

https://www.victronenergy.com/live/ess:d...ion-manual
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#3
The guys at the store are right in a way, the victron units do not have a solar charge controller but they do have a ac charge controller so if you only bought the multigrid or multiplus then it can only charge from the ac. You need to couple them with a victron mppt solar charge controller for the whole setup to work the way you want.

There's very few units out there that has all built in one, ie. solar charge controller, ac charge controller, inverter, grid-tie all in one unit. The chinsese branded ones like mppsolar are the only ones I know of that are capable of doing it.
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#4
(04-07-2019, 09:12 PM)not2bme Wrote: The guys at the store are right in a way, the victron units do not have a solar charge controller .........

https://www.victronenergy.com/inverter-c.../easysolar
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#5
Thank you for your replays.
However, as the victrons seems appealing, they dont match my demands, especially for that price.
If i want victron to meet my requirements it will cost me 1600e, and every 6 months an update(with i suspect an email to our big brother)
and i must buy a "first choice" switch, because they will load anyway my powerwall if empty.
I am not afraid to spend money, but he, if i can buy what i want that will meet my requirements aldo half of its giving capacity.....
I can buy 7 for the same money and achieve a lot more.

But the victrons, you can specify the voltage of you're load and everything else, except.....deplete my bank first and then use the grid....and leave my bank for what it is(~40-50%dod)......Victron won't do that, as perfect as it may seems.(lithium settings)
In a way Victron is perfect....if you have a boat or a camper or such small thingy, or you are really of grid, in between a big NO, sorry

Those pip's do the same, but for an 8th of the cost.
Aldo i can buy a separate mppt and inverterter, from victron (that will meet my recruitments) will cost me 1400 and no room for expanding.
Yes i did some home work(thanks again to both, really appreciated!), that's way my late replay.

With those pips i can go expanding.
For my first fase it will be a mpp solar, than expand, then a victron off grid device. if i accumulated enough cells.
Or leave it as it is and buy one for spare?
Panels, i dont think they going to be a problem, BUT still thinking.

More advice is welcome and very appreciated, with best regards Igora.



perfect, i think(the umschaltstation), it's a simple relias??.,., f...i had a cheap and better solution and schematic somewhere,..... when i was younger.
Still learning English. Learning Li ion and solar technology.

1400 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
2600 waiting for testing.
approx: 500 cells not safe for use: dead, heaters, to high ir or sd

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply
#6
(04-09-2019, 05:05 PM)100kwh-hunter Wrote: But the victrons, you can specify the voltage of you're load and everything else, except.....deplete my bank first and then use the grid....and leave my bank for what it is(~40-50%dod)......Victron won't do that ........


Yes they can, self consumption/with battery life/pick your own DoD. Theres very little Venus doesnt do out if the box, if it's not doing what you want, as it's open you can make it do it  Smile
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#7
My victron inverter is doing this right now, it's a Multiplus model.
It powers my house 100%* of the time from batteries - I have it set to drop back to grid supply if the batteries are depleted.
You do this by settings in the "virtual switch" section.
The batteries are charged by victon MPPT chargers.
*It's only had to do this once so far, but did so seamlessly (wife & family didn't even notice). After a week of partly cloudy weather in mid winter, someone put the kettle on. When the kettle switched off, it cut back to the batteries, then sun came up, all good again from there.
Sean likes this post
Running off solar, DIY & electronics fan :-)
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#8
            Hi,
  I'm new to Solar installations and Im just starting to wire my 10 X 100KW PS Germany Monocrystalline solar panels to a 3KV PIP2424HS Hybrid Pure Sine Wave Grid Tie Inverter ( which I bought from Lazada ) and to a 3 X 200 AHr Panasonic deepcycle batteries. I use a WatchPower alternatively with MPP Tracker Softwares.
  May somebody help me out on how to connect the AC input and AC output to the grid, I mean will I connect the AC input to my breaker and use the AC output as an outlet just in case I need it, say for charging my laptop ? I have all the safety electronics like disconnects and appropriate breaker in between all connections and I've watched so many You Tube videos on safe connections. My goal is like all our goals, to charge my battery from the solar panels and use both or either solar or battery to reduce my utility bill which is the general use of this solar installation in the 1st place.
   Your kind assistance please, even sketches or jot down base on your experience will do. Big Thanks in advance.
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#9
(04-15-2019, 03:28 AM)Ric Wrote: Hi,
  I'm new to Solar installations .... 
  May somebody help me out on how to connect the AC input and AC output to the grid, I mean will I connect the AC input to my breaker and use the AC output as an outlet just in case I need it, say for charging my laptop ? I have all the safety electronics like disconnects and appropriate breaker in between all connections and I've watched so many You Tube videos on safe connections.

If you are new to electrical stuff, you really need to get an electrical contractor (electrician) to do this (should get electrician anyway!).

Read the inverter instructions and follow it. 
See here: https://www.mppsolar.com/v3/pip-hs-series/
Have AC circuit breakers in mains input side.
Have DC breakers or fuses + isolator on battery before any gear.
Running off solar, DIY & electronics fan :-)
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#10
@Sean,

https://www.bootschappen.nl/easy-solar.h...=167845724

So basically this one will do what i want, without hesitation or adaptation of the device itself?
Powerwall FIRST with charge and discharge and then SECOND if i got a wall without power the grid!

I can set the minimum voltage when he must switch to the grid and i can set a maximum voltage to charge up my bank?
I want him to use the grid if my bank is lower than 3.2 volts and stop charging (pv array only!)at 4.00 volts.

Is it also possible to let him charge first up to 4.00 volt (with pv array only!)after my powerwall has been discharged to 3.2v.
And then use my pw again?
Without using the grid to charge?

Thanks in advance
Still learning English. Learning Li ion and solar technology.

1400 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
2600 waiting for testing.
approx: 500 cells not safe for use: dead, heaters, to high ir or sd

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
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