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Alea iacta est I'm back again after having made some purchases. Thank you everyone for contributing so far! A delivery was made for 12 units of 2V 620Ah forklift batteries. It was a nightmare to transport approx. 450kg of flooded lead acid across the sea in a small boat. ? They had 2,11-2,12...

Thanks for your input! That described use case of 10kW is actually a perfect storm that never happens. As I said before, the only thing that is the issue at the moment is capacity and solar production, as the currently deployed 12V 2,6kW Outback itself can handle the dishwasher if batteries are...

Exactly his. There has been a large feature creep during these last few years. Here is our current usage for a summer day without vacuum or dishwasher. I'm having difficulty believing this would require a 9-10 kW inverter, if I'm reading this right. Number 2 is with dishwasher.

Damn, I'm going blind. Here it is for year round. I think the southern roof is quite close to 45 degrees.

Indeed. I might have to do the audit now. All of them facing directly at south at an angle of about 45-60 degrees. EDIT: While I'm doing the audit, what do you think about the Multiplus II 24V/3000VA/70A for the supposedly accurate new setup? It's on discount currently at 1275€. I wonder if...

We've been with 12V for the life of the current system and so far charging and scaling are the issue with 12V. This is why we are heavily considering 24V. As I mentioned above, sometimes we have to take 2-3 kW for a powertool or damn dishwasher ?. Otherwise the stable load is pretty low during...

Thanks, but we cannot fiddle with the dishwasher. It it what it is. Our first option was FLA 2V forklift, because sometimes we have to take 2-3 kW for a powertool or that washer. These sudden usage spikes are the main issue for our next battery bank. AGM cannot survive such discharge for long...

Thanks for your input again. The cottage is on island by the baltic coast and is completely inaccessible for at least 3 months during winter. During this time it can go as low as -20C, but -35C can happen for a day or two every year. Summer is a different story however. I'm still hoping that a...

But if the Outback 2,6kW Inverter-Charger is 12V only, we cannot use it for the new 24V system? The only thing we could reuse is the Flexmax 60A charge controller for the current 1kW PV, if I understand correctly. Thanks! This is the exactly the kind of information I was looking at in my...

Thank you all for the replies so far! As I mentioned earlier, 3 months of winter is the issue with lithium. According to all the information on this site and the internet, LiFePO4 cannot be charged when below 0 Celsius.

Thanks for the reply! Please bear with me! This is a good point! I'm actually completely new to solar and electrical systems, so I hadn't considered this. I'm having difficulties trying to identify the exact model this Outback inverter is. There are no model markings on it. All I know that it...

Hello! I'm in the process of upgrading our offgrid small holiday cottage solar power system and I would like some input on a new battery system and perhaps some other considerations as well. Old setup: 1kW solar panels Outback Power Flexmax 60 (FM60-150VDC) charge controller Outback Power...