Jump to content

DIY 13S2P


groob2

Recommended Posts

Just that usually NCM etc chemistries are usually 14S to be more compatible with nominally 48 V inverters. Inverters have traditionally been designed for 20S lead acid, for which 48.0 V is nearly dead flat. 3.7 V for most non-LFP non-LTO lithium chemistries is a middle of the range value, like 12.5 V for a nominally 12 V lead acid battery. So lead acid is roughly 12.5 x 4 = 50.0 V at middling SOC and not being charged. The problem is more often at the lower end, with the so-called 64 V models, which operate at up to 64.0 V on charge, and their output tends to start clipping just above 48.0 V. You would like to run your cells down to 3.6 V or lower, which is only 3.6 x 13 = 46.8 V. So 14S is generally a better fit than 13S, depending on the specific inverter model.

Is it possible to add another pair of cells? Or perhaps this is not for inverter /  UPS use?

Link to comment
Share on other sites

14 hours ago, groob2 said:

First time building a battery pack. Any glaring flaws in my design?

spacer.png

I don't know how you physically placed your cells, but you have 14 positives and 12 negatives. That for one is a glaring flaw. Perhaps you have one cell that only has 2 positives? 🤪

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...