Guitaret wroteSo you only need 3 hours of consecutive 1000W? that is 3000W.
For autonomy using a Lithium battery (highly advisable): this will be 3000 / 0.9 (safe DOD ) = 3.3Kw or ~4kw (to be safe). But you need 9 amps to charge it in 2 hours from empty ( you can go with solwer charge).
For autonomy using Lead Acid: this will be 3000 / 0.5 (safe DOD) = 6 KW or about 2 x 240ah tubular lead acid batteries. If you decide to go with this battery type, get the C10 rating, not C20. They cannot be recharged in less than 5 hours, so they need 2.6 amps for 5 hours to recharge from 50%.
Let me know if you need more details, or recommendations for which brand and seller.
Would you recommend investing in an e-generator like the Ecoflow Delta Pro or the Bluetti EP500?
Where I live they forbid us from installing more than 2 solar panels on the roof (after they told us we could set up a system. We did an entire assessment and got the offer and we were going to start assembling until they told us we cannot have more than 2 panels tops which screwed us big time)
Currently looking into alternatives but not sure if it's worth it in the long run.