2 Deka Forklift Batteries,,24 Volt, 500 AH @ 6Hr Rate (NEW) MFG 3-2016,,Never used,,1000 Lbs

I have an opportunity to purchase these as I am in need of more amp hours as I expand my system. Question is they are new not ever used but sitting on a pallet for 3 years in a warehouse do you think they have suffered any deterioration over this time period they have been on a pallet and kept warm have had a charge on them a few times?
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Second system 1890W 3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.
5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.