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The Akros capsized three times during the major storm, which tore off most of its solar panels and its wind indicator.
He is only about 1500km off the coast of Chile and nearing the end of his more than 7000km journey from Dunedin to Cape Horn.
Mr Konyukhov said the weather had now eased and he had been able to investigate the level of damage.
"I can report that all the damage was on-deck only.
"The solar panels on the port side were torn off, and this loss became noticeable immediately. Only two panels remain."
He said it was taking much longer to recharge his onboard batteries and he was conserving power when possible.
He said the wind indicator and its mount were also ripped off and he had now used all his spares.
"I no longer have data about the direction or strength of the wind.
"From now on I will have to go blind."
However, the cabin remained intact and dry, his freshwater-maker was working, and his communication and navigation equipment remained functional.
He said the weather was deteriorating and the autumn storms were becoming more severe.