Yes 8160w of PV. The lithium battery is 400ah x 16 cells 53v nominal roughly 21.2kwh of storage.
We do have a auto start 8kw 3cyl kubota diesel generator that came with the property. Though It's not even wired up at the moment and hasn't been used since 2012 when we purchased the property. I will keep it but I don't see us using it.
As for the workshops consumption although the power tools, welders and other machinery use large amounts of energy to run them they are not running for long periods of time. So they dont contribute much each day to the total KWh consumed. Smaller loads that are on 24/7 or for many hrs at a time like refrigerators, air conditioners, water heaters are the big contributors.
The Imiev can consume as much energy as the house on days when we have longer distances to drive. Not uncommon for the car to consume 10kwh and the house 8 - 12kwh. Shifting 1080kg of steel + 3 people around the hinterland at 60 - 100kph at up to 100km distance sure sucks the electrons
Though it is kind cool zipping up the range overtaking the bellowing diesel and petrol cars on nothing more than yesterdays sunshine
As for spare energy. Yes in summer we hit float every day often if we sleep in late like today...
we are on float before we have eaten breakfast. So the remaining sunshine/energy is free to use how we like.
For example today the Imiev is topping up on charge now should be 100% by 11am or so. We are driving to Aldi supermarket thats 45km down the range (90km round trip) The house battery's are full so all energy to the Imiev is excess energy. It's going to be 35C+ today so the power room air condition is running and has the room at 24c . When we go out I will leave another Air conditioning on in our media room so we come to a chilly space after lunch when we get back to chill out in. I will have the Imiev back on charge by 1pm and will switch it off around 3-4pm. having lots of time flexibility with when and how we consume our energy (as in use lots when the sun is out) makes life much easier for living offgrid. If your at work all day and come home to use all your energy then it gets harder.
Our PV is actually set up better for winter production and QLD has good winter output so the reduction isn't that much. The only time you have to conserve energy is when you get several days of low output from big slow moving weather event. Though only happens a few times a year. I think conserving energy when that happens is more pleasant than running a generator .
Offgrid 2008, Selectronic PS1 6kw/48v inverter, x 2 Midnite solar classic 150 MPPT, 3960w NE PV 24 x 165w BP panels, 4200w NW PV 21 x 200w DAQO PV, 16x400ah lithium.