[RE-wrenches] EG4 v HomeGrid battery systems update?

[Maverick Brown]

The HomeGrid Stack’d is a nice expandable system where each blade adds to the capacity. Each blade has a BMS and they communicate to the master BMS that is stacked at the top of the top battery. I have a few sites that are Stack’d!

They are not officially server rack batteries since they stack self contained and don’t use inter battery cables either. Need more capacity, just stack another battery (shutdown, stack, DIP SW, boot up). That is their advantage. The disadvantage is that they are only 15S instead of the more well adopted 16S LiFePO4. That just means they are slightly less flexible if the need arises to parallel another brand… not a show stopper.

I’d recommend HomeGrid Stack’d. They also have heated versions, if needed.

https://www.youtube.com/watch?v=3Bms51adiYE&t=1062s
Homegrid Stack'd Lithium Battery Deep Dive & Bootup with Maverick MacGyver
youtube.com

I also have EG4 Server Rack and Wallmount Batteries deployed. No issues there either. The Wallmount batteries are also a breeze to install with the quick connectors. The outdoor version is heated.

If you are just needing 15kWh, then one wall mount battery and you are done.

Also, as a curve ball, the Discover HELIOS is also 16kWh and self heated and also has an available gutter / wire-way that fits the Sol-Ark 15k and it might also fit the 12k? That would make for a sweet setup.

 


 
Maverick Brown
Off-Grid Solar Commander since 2006
Maverick Solar Enterprises, Inc.
 • Solar Commander Remote Power
 • SunFlow Systems Cathodic Protection 
maverick at mavericksolar.com
512-460-9825

> On Sep 2, 2025, at 9:40 AM, Christopher Warfel via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> Hi Wrenches, I went through the archives and read the comparison between these two.  The HomeGrid manual was in such a mess (or my pdf reader was defunct), that I started looking at other options. If anyone has a strong opinion of either of these two, or something better, I would appreciate.  We traditionally install small systems, and this would be one (@15kWh).  I would prefer to use a racking system with the BMS as part of the packaging. Solark 12kPV multimode.  Thank you, Chris
> 
> -- 
> Christopher Warfel, PE
> ENTECH Engineering, Inc.
> PO Box 871, Block Island, RI 02807
> (401) 447-5773
> 
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