LIFEPO4 Battery discussion thread

denmendez65 said:
Lol. I don’t have LFP🤣. Like everything else my batteries have a calendar life. No point protecting them. Just squeezing all the ROI from them.
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You do, in that box from builders warehouse that powers your oven at night.

What you doing with them then?
 
wingnut771 said:
You do, in that box from builders warehouse that powers your oven at night.

What you doing with them then?
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Nope. Will keep them separate. 3.6 will become useless afterwards. And losing out on 2 batteries as only have 10.

They getting used. I see the Omni only took over around 9:30pm. Wasn’t using much power today it looks like. 94% battery on the Omni as I type.
 
denmendez65 said:
Nope. Will keep them separate. 3.6 will become useless afterwards. And losing out on 2 batteries as only have 10.

They getting used. I see the Omni only took over around 9:30pm. Wasn’t using much power today it looks like. 94% battery on the Omni as I type.
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What you doing with the busbars then?
 
denmendez65 said:
Nope. Will keep them separate. 3.6 will become useless afterwards. And losing out on 2 batteries as only have 10.

They getting used. I see the Omni only took over around 9:30pm. Wasn’t using much power today it looks like. 94% battery on the Omni as I type.
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Why will you lose 2 batteries? Just drill some holes into the omnivolt and connect positive and negative to positive and negative of LA bank then solar can charge both during the day.
 
wingnut771 said:
Why will you lose 2 batteries? Just drill some holes into the omnivolt and connect positive and negative to positive and negative of LA bank then solar can charge both during the day.
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48V needs 4x12V. I have 10.

And no need to drill.

Setup works fine. No need for all of that lol
 
wingnut771 said:
Remind me how u using 10 batteries now.
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So it's 10 batteries, in 2S5P config. Connected to the 3.6kW 24V inverter.

They buffer the solar (when the clouds hit, etc.) and get used at night between 8 am and 8 pm roughly. All circuits in the house get supplied by the 3.6 during that time, unless a large enough load hits, then the kitchen and lounge get switched over to the 5kW (3 of the 6 DB breakers, that is, 3rd being the oven). Then reverts back to 3.6 when the load goes away.

After 8pm, the Omnivolt takes over and supplies those 3 DB breakers. 3.6 continues to supply the remaining 3 breakers, which are low load.

Average of 20 to 30% DOD on the GELs a day. About 50% on the 5kW. The extra buffer is to cover for days when the clouds are hectic in the morning and the 3.6 delays charging the 5kW.
 
denmendez65 said:
So it's 10 batteries, in 2S5P config. Connected to the 3.6kW 24V inverter.

They buffer the solar (when the clouds hit, etc.) and get used at night between 8 am and 8 pm roughly. All circuits in the house get supplied by the 3.6 during that time, unless a large enough load hits, then the kitchen and lounge get switched over to the 5kW (3 of the 6 DB breakers, that is, 3rd being the oven). Then reverts back to 3.6 when the load goes away.

After 8pm, the Omnivolt takes over and supplies those 3 DB breakers. 3.6 continues to supply the remaining 3 breakers, which are low load.

Average of 20 to 30% DOD on the GELs a day. About 50% on the 5kW. The extra buffer is to cover for days when the clouds are hectic in the morning and the 3.6 delays charging the 5kW.
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Oops. I forgot you still in 24V land. My bad.
 
Okay so battery 3 is not getting a chance to stay at full because of the loads. I removed it from the pack for now and put it on my victron mppt with the 2 x 250w panels. It's going to take time to reach that voltage but that is the option for now as it switches off before the other 2 batteries while still having a combined voltage of 50.8v.

I opened it to see if I can see any issues. Well they shrink wrapped the entire battery.
 

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cavedog said:
Okay so battery 3 is not getting a chance to stay at full because of the loads. I removed it from the pack for now and put it on my victron mppt with the 2 x 250w panels. It's going to take time to reach that voltage but that is the option for now as it switches off before the other 2 batteries while still having a combined voltage of 50.8v.

I opened it to see if I can see any issues. Well they shrink wrapped the entire battery.
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What bulk and absorb time are you using on the victron? Will we still see cell deviation from HA?

I wonder who taped the corner?
 
wingnut771 said:
What bulk and absorb time are you using on the victron? Will we still see cell deviation from HA?

I wonder who taped the corner?
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I don't know. Not sure if its factory related because it was cut there maybe for the wires?

Anyways 55.2v bulk and 120min absorption time set. Should I limit the current also during absorption? It has that option.
 
cavedog said:
I don't know. Not sure if its factory related because it was cut there maybe for the wires?

Anyways 55.2v bulk and 120min absorption time set. Should I limit the current also during absorption? It has that option.
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What is the max amps the 2 panels will push?
 
cavedog said:
I don't know. Not sure if its factory related because it was cut there maybe for the wires?

Anyways 55.2v bulk and 120min absorption time set. Should I limit the current also during absorption? It has that option.
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Lets see what the balance is at 55.2V, if a cell is peaking into OVP then drop the current and voltage.
 
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