evening all
living off grid means a change to your life style in most areas, includeing the size of machines you can use.
unless you have deep pockets and dont mind de-cokes every 50-100 hours!
it boils down to the basic's diesels are heat engines and need full operateing temp's evan with rope heaters etc you cant beat a good work out, at the end of the day most are asking them to run on low grade fuel not dino as they were design for by and large.
buy a single or a twin run them at high or low rev's but if want them to last and run well you have to use them how they were designed to be!
if you are going to relay on this set up every day for your needs then its KISS all the way.
less you want to spend a slice of your day mending your genset off grid

it's all well and good building bells and whistles on to a set central heating pumps in the cooling system etc.
but it will go wrong one day and cost you, go back to the start and see what lister did and dont stray too far.
KISS engineering
needenginerunnin