I haven’t really explored other chemistries because bulkier was a no-go for me. But you also may want to look at discharge profiles. Lithium (LifePO4) have a nice linear discharge rate, so you get nice constant power until the end (think power tools: they work, they work, they work, the battery is dead). Also, if considering other chemistries, you need to also know the charging profile and determine if the MPPT can produce that profile to charge your batteries.
evasive_chimpanzee@lemmy.world 6 days ago
Yeah, i would definitely look at LIFEPO4. People just have the name recognition of “lithium” so they don’t really understand the differences between that and lithium ion, and so from what I saw last time I checked, the price was not really different, even though LIFEPO4 lasts longer and is safer.