I was not expecting a "Buyer Beware" thread to end with seller being recommended.
Me thinks "Buyer Be Patient" may have been more accurate. Just my $.02.
This Morningstar Tristar MPPT 45 was insanely expensive (over $700) in 2010. But it has been a worker. 8 years with 330W of solar on my RV charging lead acid. The last 3 years, with 300W solar on garage, its been charging various lithium banks for the seed warmers, lighted grow house, quite a...
If you can measure your battery voltage, you can live by this chart unless you're living on the edge of squeezing every amp hour out of your battery. I live between 13.0 ("getting low") and 13.3 ("looks pretty full").
Don't overthink it.
3000W / .85 efficiency / 10V inverter cutoff = 353A
Fuse should be 1.25x to 1.5x higher to prevent nuisance blows. 500A fuse a good choice.
But since the fuse protects the wire, your wiring would need to withstand 500A and that is a difficult requirement to achieve. Looking at it the other...
Yep, you're not missing anything. All these things you mention are why I'm in my 7th month looking for a BMS that I like.
I like 3.0 and 3.45 and am getting roughly 90% capacity. I need to be conservative too, because I am the BMS.
If you are not using a BMS, then YOU are the BMS. You are responsible for monitoring the individual cells which will likely not the be same as you get over 13.4v.
And, when at the higher state of charge, it can VERY quickly get out of balance and have a cell race over 4v in just a couple of...
Sure, you may want to blur out your name and address, otherwise some psycho here may sneak over there and install it while you're away...
Feel free to add any situational info too. What are your goals for the system? Presumably they designed the system for YOUR goals.
I just like to understand what people are trying to say.
But some folks don't know what they saying, and some don't care if they are understood. And it's hard to tell which is which.