Design on new boutique winery project I just signed up has taken a left turn. The buildings are small and inexpensive, but they are several hundred metres from existing power and water utilities. Costs for trenching (including road crossing), pull boxes, transformer, water lines etc are looking like roughly $75K. Plans already included ground source field under car park to power heating and cooling system. Data on existing wells in area suggests we'll find water at about 70 m down, maybe a $10-15K installation. So I have about $60K to play with - could we build a solar array with batteries and inverters and go off grid? Owners are interested - if it's close to cost neutral. Every new brand needs something to differentiate it from its competitors and this could be it. The site has no terrain shading as you'd expect for a vineyard in a high-latitude location. The design has one building with its roof facing due south with a 45 degree slope, area of roughly 85 sq m. Two buildings of 90 sq m each, 5 m apart, one for production, one for cellar door. Heat loads are modest since there's geothermal to run a ductless split system. Most of the load will be in summer for AC in the tasting room; temps over 35 are normal for 2-3 weeks a year plus another 3-4 weeks of 30-35. Tasting room is closed from mid October to mid April. The wines are being crushed and pressed at a neighbouring property with just fermentation and ageing on site to satisfy licencing requirements - so no need for three phase power. Now I have to hustle and pull some rough numbers together so owners can make decisions in time to incorporate all this into site planning. Building permit lands in maybe 3 weeks and we'll need functional building for production by end of September. The big unknown is how much of a standalone off grid PV system can we get for $60K?