GeeGee wrote: ↑Sun Nov 20, 2022 4:33 pm
jennyjj01 wrote: ↑Sun Nov 20, 2022 3:25 pm
Having finally got all 4 solar panels mounted at an angle, I've chanced running TWO freezers from solar. Enough light through today but have set battery charger to contribute a bit earlier. Monitoring closely..
Oh keep us posted please Jenny ..what size freezers are you running off them ? Got a couple of solar panels we've had a few year run various things off them have a chest freezer in summer house but wasn't sure that it would work from solar alone
Non stop fog here at moment though hasnt been light for about a week
The first one I ran was an big full-size old upright fridge freezer. That ticks over at about 0-70 watts but takes a big unmeasured gulp at start up. The second one is a newer built under integrated one. That takes 0-70 watts too and about 400W to start up. I've yet to see whether them starting up simultaneously will trip out the1500W inverter.
I doubt the batteries would run them overnight* without some extra input, so I have a cludged system of relays that powers them off the house mains during darkness. Also my battery charger on a time switch tops the batteries up over night, too. So each dawn, the system starts the day with a full battery and whatever the sun can give.
There's a few ways it can go wrong, so I have to keep a close eye on things. Daftest problem I had was when it was too sunny and my batteries got over charged to 15V. that tripped out the inverter. If they drop below 10V, that trips it out too. I need to see if the inverter can run the freezers at start up both at the same time.
I have a LOUD Mains fail alarm always connected. It went off just once.
Objective is to try to run a third small chest freezer during daylight hours, or during blackouts..
Total solar array is now
1x160W (£75)
2x 85W (£50)
1x 100W (£50)
That's an area about 1.2m x 2.4m, mounted on a flat garage roof, supported to be pitched at 15 degrees. Not optimal, but 45 degrees would have peed off the neighbours as well as potentially blowing away.
I've now run out of places to mount more panels.
For now, it's rigged up to harvest and use as much sun energy as I can during daylight hours, to cut the bills, just using the batteries to level out the load between clouds. At dusk, the load is shifted onto house mains. thus my batteries never get stressed or deep discharged at night.
If we ever have power outage, I swap a few plugs about and the batteries would be used for resilience.
There's so almy initial 25W panel dedicated to AA battery charging for lamps.