My geniune interest in your thread, ATM I have SCR but don't do a great deal of mileage it does a great job but not enough two weeks a month now I have a power up hd reel install, next year I intend to have a two man system with two electric reels so watching your thread to see if maybe scr and solar combined will be enough?
I'm lucky in the sense that I have my own driveway and have quick fit SAE connectors fitted to my battery and battery charger so only need to run extension lead out to van to top charge up if need be, but would prefer to have it automated via scr/solar though.
Sounds like it will be a tall order as that will be a lot of power draw and as you know the weather is not predictable at all , so many factors have to be looked at , what hours you work , the type of work , is the drive shaded at all , all of it could make or break the whole idea , i usually get home in the red by 2 or 3 amps , its just the fact that i finish early still with good light conditions and am able to replenish then .
If you start at say 9 and work until 4 with hard graft 2 pumps will pull 10 amps an hour between them , so you have 7 hours at 10 amp , thats 70 amps , lets say you both break for 30 minute lunch , thats 5 amps off the 70 amps , so 65 amp is needed for the day (pumps only) , that 65 amp can be cut in half due to the pumps only running for half of the cleaning time (on average with domestic work) , so this is 32.5 amps , lets call it 35 amps to be safe , remember that this does not include whatever the power reels take to run .
The maximum that i can pull in with 120 watt of panels in good sun is 6.5 amps per hour , this is if they are the right angle to the sun , but they are not , they are flat on the roof , the most i have seen come in is 5 amps after the MPPT controller has done its bit , so for me to get 35 amps in would take 7 hours of good sun non stop , this just does not happen even in summer , well it would if you had enough panels !
This is the chance you must take when you need large ammounts of amps , you need both ends of the spectrum , these being large amp panels and the space on the roof to mount them , i am right out of room now , if 120 watt does not do the job in winter i have nowhere else to go with it , you might have i dont know , but if you start , just bear in mind that you might have to keep on adding until you get what you need .
It is worth mentioning that you have scr that will help , i dont , so you might not need so much solar to achieve your goal .
To be straight with you , it may just pay you to sit and see what happens with me over winter , like i said , at some points i get nothing in , and at some points i only get 1 amp per hour in , for me that could be 4 amps all day in winter , i need at least 8 amps to get my daily work done without the need to bench charge ever again .