There is a current Kickstarter campaign for a Solar regulator with integrated BMS for Lithium batteries. https://www.kickstarter.com/projects/electrodacus/digital-mppt-and-solar-bms-for-a-net-zero-energy-h/description
There is also an optional excess PV diverter that is designed to dump surplus PV into restive loads in thermal storage. This would be most relevant in locations where a large heating load is required. The concept is that an large array would preferentially charge a smaller than usually battery bank then divert surplus PV to heating. In this way a battery might be charged every day even when its overcast.
This 'DMPPT' does not seem quite so relevant to applications here in Australia. It would be good if it where able to drive heat pump compressors.
I am a little hesitant to start a thread about this device (the SBMS) as previous discussions about it here and elsewhere can become somewhat combative.
However it is a unique device and could end up being a very reliable and modifiable (its open source). It contains no electrolytic capacitors and has a rugged layered construction.
It's only available in 12 and 24v version which would limit large inverter choices.
It uses the Intersil ISL94203 bms chip for cell balancing which it does throughout the charge process.
I'm posting this because I know there are people here with significant experience with off grid LiFePO4 battery banks, and I would really like some of them to get one of these devices and properly evaluate it, rather than just be critical from the sidelines. The price of $400 or so for a 120 amp version seems pretty good considering its features.
I am planning on getting both the 40amp and 120amp versions.
I am really surprised at the lack of purpose built components on the market for utilising Lithium battery banks. Sure you can change parameters on existing charge regulators and use external cell balancers or other BMS. But this doesn't seem a very integrated or efficient approach and dosnt necessarily take advantage of Lithium battery characteristics, or current PV technology and prices.
The kickstarter campaign finishes in a week and is now fully funded. If you want to order an SBMS you need to do it soon, there is no indication they will be available for purchase outside KS at this point (as with previous campaigns).