I have a 24k btu Pioneer on 240 and a 9k btu Senville on 120 and both work perfectly on the Growatt. I installed the Pioneer in 2016 and the Senville in 2018. Both are used daily for heat or AC, depending on the highly variable Pennsylvania climate.
We're on the same page. My 23 yr old Trace SW4048's don't even hiccup when my self installed no name mini splits start up on heat or cool. 1 x 18,000 BTU Mr. Cool and 1x 24,000 BTU "Ductless Aire" from Home Depot.
It not a matter of oversizing inverter. It is a matter of real power (resistive) loading compared to short high current pulse peaks.
That means nothing to 99.9% of the users of this forum.
I have two 12k 240vac Mitsubishi mini splits and two 12k 120vac DIY MrCool mini splits and have been completely off grid since 21-July. No problems whatsoever with any of the mini splits and no noticeable surge when watching them ramp up with a clamp on amp meter when turning them on. I have the 120 units on separate legs to keep neutral current down.
Old Trace inverter is not a high frequency PWM inverter with PWM L-C filter.
OK that theory makes sense (which is why I thought adding active load to rotate the power factor would help), but it seems like other people are doing OK.
How long have you had your mrcools? I've seen a ton of mixed reviews and have read Mitsubishi is the gold standard of mini-splits...
Judging by all the complaint treads about flickering lights from their inverter, I don't believe that is true. They may not understand the reason, but they are experiencing the result.
Main complaints with Mr Cool: the precharged linesets are ugly. the markup in exchange for the convenience is high and you can get Chinese rebadges of higher tier for the same price, if only you had the gumption to install a standard lineset
First one in June, 2nd in early July. The first Mitsubishi was October 2022, 2nd January 2023. Not long but no leaks and so far good, time will tell.
Yes, but you are using $20 words that those of us with 50 cent budgets may not get. I try to appreciate your expertise but most of it is lost on me. It's odd that you don't even attempt to educate and just assume that everyone is at your level of expertise in power electronics.
It has been my experience that light flickering is directly connected with the quality of the LED light. I have very good non dimming GE lamps all over the house and they never even blink. My home office has dimmable cheap LED lamps on a Levitton dimmer that look like disco lights at times.
I couldn’t agree more, except the skill does not come quickly and for some people it takes forever to get where you can put a system together with no leaks. Good craftsmen really are worth their weight in gold, but for people who want to hang onto more their gold and not go through the painful experience of learning to properly assemble tubing fittings and dealing with all of the mistakes along the way in the learning process, MrCool has so far been a painless option for me.
But they aren’t 4x the price in comparison to high SEER Gree/Midea rebadged units. About 1.5x. Maybe 3x the cheapest and shittiest low SEER unit out there. At least for the equipment and DIY.
If the meth heads that are HVAC (at least in my area) can figure it out, any person with decent mechanical aptitude can get it done. Granted mechanical aptitude is a dying trait.
One of my best friends is an HVAC wholesaler, and one of the few that handle both Mitsubishi and Fujitsu. I'm building a new home next year that we're thinking of keeping off grid, and Mitubishi is a top contender (Fujitsu also in the running). I think you need to call a few more HVAC guys, as that one sounds like an idiot.
Trane and Mitsu are partners. https://gotductless.com/blogs/compa...rer Comparison,conditioning systems in the US.
