Brother: dont attach 250 watt solar panels with 1 battery .your battery will go damage ..As 250 watt panel is designed to charge 24 volt or you can say 2 batteries when connected in series.
Solution 1 :
If you dont want to change your ups then buy 150 watt solar panels along with a charge controller that protects your battery from overcharging.
If you have already bought 250 watt panels then
Buy new Solar hybrid inverter of 2kva (24 volt) and buy another battery of same ampere .
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