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So I was looking to start off with a smaller off grid system that was tied into a critical loads panel and use AC power to supplement my solar panels. As I increase my solar panels and reduce my AC usage, eventually I'd like to export to the grid once my system was large enough (and I felt like...

I'm new to solar and I'm not that familiar with the racking systems that are used to mount solar panels to the roof. Watching the installation videos, it doesn't seem too challenging but I'm wondering if there are certain spacing requirements that need to be met and if there are standard sizes...

I've finally wrapped my head around UL9540 for batteries but I'm still unclear on the differences between UL1741 revisions. I think UL1741SA is Rule 21 if I'm not mistaken. Is that right? But I don't know what the difference is between UL1741 (except that it's required to be grid tied)...

So I posted the other day with some newbie questions and that helped me out quite a bit but now I'm being told by my power company that I can self install my own solar (awesome) but that it must be Grid tied solar (I guess off-grid isn't approved) and it needs to have an inverter that complies...

I've been reading and watching videos and I'm not sure exactly what would be the best option for me. I haven't bought anything yet, still trying to figure out what I need. I currently live in Phoenix AZ and my power usage is about 16000 kwh per year according to SRP (power company). Most of that...

So I posted over in beginners corner that my power company requires an inverter that meets UL 1741, IEEE 1547, UL 1741SA + UL9540 Compatible Battery ESS system. I think this is common in California (I'm in AZ though). I got some good information and recommendations, but I'm wondering since this...

So I've been over in the UL Batteries thread but since I live in AZ, I have to comply with the California Energy Commission's list of approved inverters and batteries and so UL Listed batteries by themselves are not enough to be approved. I was comparing battery prices of CEC approved batteries...

So I was watching this video and Will is using a Growatt off grid inverter and using LIFEPO4's for battery backup. So I was wondering if the on grid inverters would work the same way. I understand that the grid tied inverters are meant to be used with the battery banks that Growatt sells for UL...

So I'm designing my solar system and I have a 4 ton Carrier Split Heat Pump AC unit that was installed in 2005 and I can't figure out how much power it draws because all of the labeling has faded on the condenser. I reached out to Carrier and am waiting to see if they contact me with the...