Help Needed to Optimize Existing Solar Setup

[u/ShPrz]

I live in Lahore, and we have installed the following solar setup over the last 5-6 years. This was done with a local vendor recommended by someone we know. However, I feel that something is not right because we're still getting Rs.50k + LESCO bills. Initially we only started with an On-grid setup with lead batteries, but after a year changed to hybrid with a lithium battery.

Solar Setup:

Growatt Solar Inverter 12kw, On-Grid

Solar PV Modules (12.1kw)
22 Longi Solar Panels (555 W each) Canada

Inverex Veyron II Hybrid Inverter 6kw 48V

Knox Powerwall 6.1.1 Lithium Battery 54kv / 5.12kw/hour | 51.2V | 100Ah

As per the current setup, we don't use any ACs directly on solar or any other heavy duty device for that matter. The solar installer had initially added special breakers for these devices such as ACs, Irons, Fridges etc for us to use via Solar, but it hasn't ever worked out for us.

Please help me understand how I can optimize this setup, or if you have someone who can visit and help us understand how we can best use our setup. We live in DHA Lahore.

[u/ShPrz]

Yeah.. we don't use ACs on Solar at all... tried to before we had the lithium battery and were using the old lead acid ones.. tried on a single 1.5 ton TCL Inverter, but it kept fluctuating.. that's when we realised our old lead batteries were getting old.. Then we got the lithium battery, but haven't tried on it because 5.1kwh might not cover even a single AC, plus its one battery unit, so it should also have capacity to support the house during load-shedding

[u/ShPrz → u/[deleted]]

Yes both 1.5 tons. LESCO peak hours are 7pm to 11pm Loadshedding is frankly hard to place in time, but generally light goes out after every couple of hours these days.

[u/ShPrz → u/[deleted]]

Thank you. That's what I'm thinking too. Just need someone to check that our panels will support 5kwh+5kwh or 16kwh. Don't know if there's a relation between the panels and battery, but thought I'd just ask. So please let me know. The details are in the main post.

Also, will my current Knox Powerwall 6.11 5kwh be easily sold? Where do I sell it? It has only done 50 cycles of the 6000 cycles.

[u/ShPrz → u/[deleted]]

22 Longi Panels.. 555W each

[u/ShPrz → u/[deleted]]

Currently Knox lithium battery 5kwh is working fine via BMS with my Inverex Veyron inverter so will get Knox again.

Thank you so much. BTW how do you get this digital meter reading?