My 1990s generator on my boat puts out 110v/50Hz and I use with my Multiplus 12/3000/120 to charge my battery bank. I would like to use the generator to power my 1200w 120v/60Hz water maker as well. Will the Multi take in 50Hz and output 60Hz? When I switch it to On instead of Charger Only, it shows 50Hz on the L1 output. Is there a setting for this? Or do I need to alter the generator to 60Hz?