Solis Hybrid inverter with DIY battery

good work graememk.

I suppose at moment I won't need to communicate. Initially the only "automation" required will be to enable some load shifting, hopefully Solis should manage it.

I'm running my pack without a BMS at the moment (but with the NEEY) and that is exactly what you need to do, particularly if you haven't fully top balanced all your cells first. And not only going up, but also going down. So I would charge up to maybe 54V first and don't let it go down below 48V first either (this is still cycling between 99% and 10% or so)

They will work with any chemistry, even lead acid!

Of course. Some say more effectively than if you use a BMS 🤣

You need to set the voltages right though and you need to keep an eye on the system and check your cell voltages particularly if you don't have a balancer either. Basically all the stuff that a BMS is supposed to do.

Several people are doing that @Big Lar. Check the home automation thread in this forum

Seplos and I did not get on, we got divorced. I've remarried since (JK BMS) 😁

But as for any BMS, I can't see any limitation really for the number of cells used. I've 40kWh on the JK BMS no probs

Anyone know what the auto battery awaken new setting is?

as my JK BMS doesn't comm with Solis the battery shuts down and needs to be manually restarted at moment. Pain in the ass

To solve that problem I set the inverter Over Discharge voltage to above the JKBMS so that the inverter disconnects the battery before the JK switches off.

Will yours charge any faster than 2.2kw per hour ?

Hmm interesting- any idea why mine won't go over 2.2kwh, I also have jk bms

ps is that a home assistant interface?

I have the BMS lower than 48V, inverter here turned off the battery last night at 3:00am(2:00am inverter time)

For me the JK reads 0.3V higher than the Solis inverter, the lad in "Off grid Garage" saw the same difference, also see the BMS graph below the voltage just dips down and recovers, from here the battery will only power the inverter and not feed back to the house until it starts charging again.

Cell 9 which is the lowest cell I have drops to 2.94v so no harm done.

Hi. I have a 3kW Solis hybrid inverter RHI-3K-48ES-5G which has a max charge/discharge current of 62.5A. I have 16 cells on order from NKON. My next purchase has to be the BMS.

Now from this thread and others there appears to be lots of difficulty with various BMS models communicating with the Solis inverters. Some people have been successful with the Seplos and others with the JK.

Which is the easier to use?

Dermot

I have a Solis s5 6k and ordered a master/slave kit to go with my pair of older JKs and DIY battery banks. Hopefully I can share what works or not in a month or so.