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Silly question about 3kw solar, charger and battery
#11
The simplest way would be to have a regular mains powered battery charger switched when your solar input is high.

A typical grid tied solar panel installation usually runs high voltage DC (200-400V ish) & you don't want to mess with that.
Running off solar, DIY & electronics fan :-)
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#12
If you already have a grid tied setup, like the OP, you want to build an AC coupled system with a hybrid inverter like the Victron mentioned previously. If you look up those systems, they go between your current inverter and the panel/grid and either let it feed your house, charge batteries, or sell to the grid.
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#13
(05-02-2019, 12:46 PM)hazSolar Wrote: .....  they go between your current inverter and the panel/grid and either let it feed your house, charge batteries, or sell to the grid.

Victron inverter/chargers are installed parallel to the existing grid tied installation not "between".
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#14
Very stupid maybe.
Disconnect your array and connect it directly to a vectron unit?
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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#15
(06-03-2019, 05:28 PM)100kwh-hunter Wrote: Very stupid maybe.
Disconnect your array and connect it directly to a vectron unit?
The problem with this from my experience is City Inspection.  By going off-grid I was able to legally bypass all the Power Company (not so good) requirements.   IF you hook victron directly (rather than parallel) I would imagine you would need to revisit Power Company requirements/permits. Maybe by doing parallel - you could avoid that.
P.S. I liked the question Smile
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#16
Same problem over here, and worse.
Despite power company requirements/permits
You are not allowed to go offgrid, they want to control.
You must deliver to them, battery's in large numbers is not allowed anymore(agm, lead acid ect) 2 max.
Try to get a tesla home battery.....ect ect
You must use something.

So built it of slowly...so i will only have a electric cooking plate/furnas on the grid Smile
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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