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Detailled stats during battery operation: https://pic8.co/sh/1lr5zu.png

Back to grid power: https://pic8.co/sh/4e6C4p.png

It's been 1.5 years in the making, half of that for all the components to arrive. Most of the rest was procrastination, some of it caused by fear I wouldn't be able to get it done. :)

Detailled stats during battery operation: https://pic8.co/sh/1lr5zu.png Back to grid power: https://pic8.co/sh/4e6C4p.png It's been 1.5 years in the making, half of that for all the components to arrive. Most of the rest was procrastination, some of it caused by fear I wouldn't be able to get it done. :)

(post is archived)

[–] • 3 pts

Congratulations!

I did the same thing. I also suffered through the same things you did. I bought a bank of LiFePo4 batteries and a 6Kw low frequency inverter. I back feed a 30amp branch circuit and can run the entire house on it.

I also have a 5Kw gasoline generator I can use to run the inverter's charging circuit at 60Amps DC. I have up to 5Kw of solar panels with an MTTP controller as well.

I expect the power grid to fail anytime now. So I'm ready. When it's up and if I need to charge my batteries, I can. Yea, the smart meter will be very confused. When they switch to time of day pricing, I can completely disconnect the house during peak rates.

[–] • 1 pt

Awesome! Have two Diesel gennys that put out 230/400 Volts at 4/6 kW. (EU standard voltages)

Any tips on how I could use those to put charge into the battery? No solar on the roof yet, so I'll be able to use the inverter's PV inputs. I doubt a simple full wave rectifier would do the trick, since that's pulsed DC.

If available, I'd like to get a ready made solution, if such a thing is on the market. A homebrew 6 Diode rectifier might work but I'd have to get in touch with the inverter manufacturer.

[–] • 1 pt

I've got a couple of LED flashlights and a wood stove. I'm ready.

[–] • 2 pts

As long as it's not a wooden stove, you should be fine.

[–] • 0 pt

Your generator probably outputs 50Hz sine wave, so look for a battery charger that allows 220-240 volts using 50Hz. There should be plenty. Ensure the charger outputs the correct voltage for your battery type. Flooded batteries use lower voltages than LiFEPo4. Most modern chargers are capable of supporting most battery types.

[–] • 1 pt

You're correct. 50 Hz sine wave at 230 volts rms (single phase to neutral) or 400 volts rms (three phases). The inverter tolerates 80 to 1000 volts as per data sheet. I just worry about compatibility of pulsed DC, which a simple rectifier would produce from the generator's AC.

[–] • 0 pt

SolArk is better

[–] • 0 pt (edited )

Maybe, maybe not. But it doesn't come from the country where the Führer was born :)

[–] • 0 pt

Very cool. I've been planning on setting up a similar system. I was having trouble figuring out what inverter to use though... I noticed your system uses Fronius so I went to look them up.

...

Wow, these things use a lot higher DC input voltage than the systems I was considering. That's both cool and scary at the same time. Now I understand why Amazon had problems with fires due to arcing; DC arcs much more easily than AC.

How many volts is your battery array? And what are you using for your charge controller?

[–] • 1 pt

Check out diysolarfoum.com I don’t know any better source of info.

[–] • 1 pt

Assuming you mean https://diysolarforum.com/ ? :-)

Thank you.

[–] • 0 pt

Dang it . Yup. Everything you would ever need to :now to know more than the guy selling the systems is there.

[–] • 0 pt

It's a BYD HVM pack/tower. Here's a snap shot of the data it spits out (German).

https://pic8.co/sh/0TnYtc.png

[–] • 0 pt

Aha. Interesting. TY.

[–] • 0 pt

Need any more info, let me know.