My work in progress

[Letmo]

The main array is 32 bifacial 540 watt panels pointing directly south angled for winter. The structure is about 30’ tall and 30’ wide. The racking is built from the curtain rods from an old stage. The frame is made from structural joists that fell off a truck 30 years ago. A second array will have 9 panels facing east and 9 facing west attached to the garage roof. The batteries are 18S 280 ah LiFePO4 with JK BMS. There are three connected to the main array and one to the secondary. The inverters are MPP LVX6048WP. More pictures coming soon.

 

[G00SE]

18s batteries? How many volts does the lvx6048 support?
Love the ingenuity on the rack

 

[Letmo]

They can charge up to 62 volts which is 99 percent capacity and right about where balancing is meaningful.

 

[G00SE]

Not trying to question you, rather a general question. But won’t balancing typically happen above 3.45v per cell which you’re just at the cusp of. Is there any negative implications with this?
Seems like a reasonable way to prevent overcharge/runaway and keep healthy batteries in that regard though

What prompted you to go that route vs the typical?

 

[Letmo]

I ran across this spreadsheet when I was first learning about this stuff and this arrangement caught my eye.
https://docs.google.com/spreadsheet...SLTXYv_1LlbcFqE4gxMgK8SrMvs/edit?usp=drivesdk

I figure balancing anything over 3.375 volts should sort of work. It gives a decent amount of extra capacity with only minimal extra cost. I also wanted to use the full capacity of the inverter.

 

[timselectric]

Looks good.
No comment on the rest. I'm too tired. lol

 

[pollenface]

Love it!