My personal opinion of the pecking order (from best to lesser), but all of these are good batteries. Do take a good and hard look at the warranty as well.
- BYD (Premium/Flex)
- FreedomWON Lite (with the OrionBMS)
- Pylontech
- BSL
- FreedomWON eTower
- SolarMD
- BlueNova
- Hubble
I’m completely ignoring cost. Hubble, for example, is quite affordable. Some installers prefer BlueNova over the eTower. This is just my list.