Choice of battery

[Barosanurexx]

Hy guys
I would like to buy new batteries for my solar sistem because the old ones failed,I have the c rate 100 so I cook them
So the new batteries will be again 8 of them.How many kw I can squeeze from the new ones ,my inverter is 48v.
I attached a photo with the new battery

 

[mikefitz]

At under a £100 in the UK any battery is poor quality and not suitable for cyclic operation. The Rombat battery is most likely a generic far east import starter battery. For a decent lead acid expect to pay £200 to £300 per 100Ah.
Each 100 Ah battery will store 100 x 12 = 1200 watts hours, 8 x 1200 = 9600 watt hours.
At 50% discharge, 4800 watt hours.
How long did your batteries last?
Four 100Ah lithium from Fogstar would be more cost effective.

Lithium Leisure Battery - Fogstar Drift 12v 105Ah

105ah 12v Fogstar Drift Lithium Leisure Battery | Grade A LiFePO4 cells, JBD BMS, Bluetooth, Heating | Lowest Prices in the UK. 10 Year Warranty.

www.fogstar.co.uk

Or a diy 48 volt battery using Fogstar cells.