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........I'm building my own LiFeSO4 12V battery. ...........

You're actually building a battery? :vs_whistle:

 

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A 12 volt battery bank and 200 total watts of power sounds pretty small for a 3000 watt inverter and running a fridge. And you won't be running your 120 volt fridge very long on a 400 amphr battery bank. I'm not trying to be rude or rain on your parade, just speaking from experience.

I have a grand total of 400aH in my system, and ran my fridge and freezer for 3 days last week, using a 4000w inverter.

 

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Yep! And I'm willing to bet you had sunshine and a lot more that 200 watts of panels

You lose. 80 watts.

 

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No offense, but what you are claiming is mathematically impossible. Is there more to the story?

Um... maybe the fact that you don't run anything off the solar panels.... you run it off the the batteries.

 

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That is what I am talking about. Even if you are using a very efficient chest freezer and a small dorm fridge, you are still looking at about 600Ah for 3 days of use. And that is before you account for the inefficiency of the inverter and power lost through your cables and connectors.

If you are going to brag about something at least make sure it is possible to do.

Again with the assumptions.

I don't turn the system on and let it run 24/7.

I turn it on, let the fridge and freezer cool down, then turn it off. I can then leave the power off for 6-8 hours with no ill effects. STARTING a refrigeration compressor is where most of the power is used... NOT running it.

If you're going to tell someone a liar, at least get your own facts in order first.

 

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........think that you did all this with a 400Ah battery bank and an 80W panel. The only difference is I know that it isn't possible.
.......

And you know this because................ you've actually tried it and failed, or just read it in a book somewhere?

Perhaps you should go back to plugging your sales.

FWIW, I'm not going to spend any more bandwidth on you.