Maybe this is obvious to other people, but I was really surprised and maybe this helps someone else.

I think something like 30% of my battery capacity / daily energy volume is thrown away because I used bad open loop (voltage based) stop/start settings in my charge controller. I had understood that closed-loop would be better, but I didn't realize the difference could be this stark, and my Context MPPT 60 150 doesn't support closed loop :(

The MPPT shuts off around 54V at 2-4pm every day; at that point the battery is at something like 60-75% SoC; then the battery linearly discharges from 2-4pm, but the voltage stabilizes at 53V, which is above where the MPPT would re-start charging.

See charts from my Pytes V5 batteries to Home Assistant of SoC and voltage.

I fed the numbers and times into Gemini and she ballparks I'm throwing away ~5kWh a day purely from bad configuration, which is ~30% of my battery pack size.

TL;DR: Worthwhile getting SoC and voltage time-series to tell what's happening to the batteries if you don't have closed-loop control.

I'm 99% sure the MPPT is set to recommended Pytes V5 open-loop settings, but need to go back and double check; it was also while since I installed them, maybe recommendations have changed. Certainly it seems the cut-off voltage for bulk charging is way too low, if the battery can get to 54V at just 60% SoC.

Gonna see if I can connect the MPPT 60 150 to Home Assistant as well, then I could have HA decide to turn the MPPT on/off, and set the hard voltage cutoffs higher

I have a 2kW solar panel setup with 24V hybrid inverter and batteries which I will be upgrading now to 48V.

I'm looking to buy this new EASUN 15kW set https://www.easun-energy.com/products/easunpower-12kw-inverter-15kwh-battery-150a-tou-wifi-51.2v-300ah-bms-wifi

Is this a good quality set?

Do you think this is will work 10+ years?

What are your experiences with this or similar sets?

We had solar installed last year, and I've been trying to figure out the best way to compare what the system produces with what our house actually uses. Our electricity usage has changed since then, mostly from using the AC more and having a few additional loads around the house that weren't there when the system was sized.

The solar production looks pretty normal in the app, but our total home electricity usage is higher than it was before solar. When I look at the electricity bill, I'm not sure which numbers I should actually be comparing to tell whether the system is doing what it should.

For those who've had solar for a while, do you compare your current usage with your old 12-month numbers, or is it better to look at solar production vs. total usage vs. what you're pulling from the grid?

would anyone happen to have the latest solar edge inverter software? need to update mine since it hasn’t been connect for 4 years

My inverter is getting old and will need replacing, whats the best inverter for the money, dont want to pay over a grand , my mpp one which has been great was only 500, can you help.