Your split phase inverters start at 5kw and you can't use the European 220v versions for doing it without some serious transformer black magic. The phases for running North American 220v stuff have to be opposite wave form to run and the European models are just a single 220v leg and single wave form.Thanks. I'm looking at 2 of the 3K units or one of the 6K units. Should be WAY more than I need, even with startup. Like I said, this is a vacation-type property (bedrooms in the back of a pole shed), so if for some reason I had to switch off the air in one of the zones, or heat with a propane unit in a certain situation it wouldn't be the end of the world.
Even the 5kw and 6kw and up inverters are really just a pair of regular AIO units strapped together and with a control board to make sure AIO1 is out of sync at the right rate from AIO2.
When you look at the 3Kw systems and they say they're parallelable, the 6Kw are just 2 of those in the same box.
OK, I think I've beaten that horse to death. Check the spec sheet of the AirCon unit you're looking at for maximum amperage, wattage, wattage of each indoor unit, etc and add them together so you know the 2 most important things. 1: Total wattage to run all the bits at max load, and 2: Maximum startup amperage (to calculate surge wattage). Once you have those as your base line, you can start adding up the additional wattage you'll want for the lights and internet and coffee pot and tv and such.
Add all that up together and round up to the next available size. Worst case scenario you're doing multiple inverters and paralleling them together above and beyond the 220v split phase, i.e. 2 of the 5Kw's paralleled for 10Kw at 220v split phase.
Air conditioning, next to heat, is murder on off-grid systems.
I would not go that route. Buy the more efficient units made in 208/240, and power them accordingly. Personally, I would not try this with a 3k unit, I'd go at least 5k, there isn't that much difference in price. Try to buy an inverter that has split phase natively so you don't need an auto-transformer.Thanks for the tip. I was also thinking that one of the 35-38 seer might be a better play. It would be awesome to keep the living spaces cool/warm all year. Saves me from having to winterize. I am looking now at the LVX. Split phase, 3KW on each.
Also, having used MANY mini splits in projects, I always recommend that people buy the smallest unit they can get for the load, and buy separates. Not the combined multi head unit. Those are much less efficient. 22 Seer for a mini split is lousy by today's' standards. Separates cost more, and cost more to install, but you get what you pay for. Also, long term they will save you a lot of money. I wouldn't even look at units under 30 SEER.
Knowing nothing about your layout, I might add that in our projects, we have often found that a single unit will cool a much larger area than you might supposed. In your scenario, I might think about 2 single head units, around 33-36 seer, and see how it works.
When I put them in, I do all the mounting, conduit, electrical runs, breakers, etc. Then I call an HVAC technician and have them purge the lines and do the coolant.
Good luck!
Hello guys, im looking for to purchase my first PV Hybrid system. I’m looking for a good, hybrid, 3phase, asymmetric inverter to combine it with some good battery, around 15kw inverter and 15kw battery pack
If you want to learn more, please visit our website Sunplus.
I’ve been hearing good reviews about the Deye, any ideas? Any recommendations? I’m located in EU Greece
thank you
Sungrow is a great, powerful option with an inbuilt bypass contactor and up to 4 x MPPTs (on the larger 8 & 10kVA models). On the other hand, Fronius only has 2 x MPPTs, and an external contactor is required.
Deye Hybrid is the best option if you have 2 AC sources such as the grid and a backup generator.
I would also be interested whether Huawei could meet my requirements that are as follows:
Contact us to discuss your requirements of 3-phase hybrid inverter. Our experienced sales team can help you identify the options that best suit your needs.
In fact a local installer (for my house in Italy) recommended the following setup from Huawei:
Anyone has experience with Huawei in a 3-phase config? Any advice?
Better to have a look on Huawei prices first. Have had a Hybrid 10 KW Huawei Inverter installed and was planning to install 2 x 10 KWh Batteries, ridiculous. At the end I have kicked out the only one year old Huawei Inverter and Installed two pcs. Deye 10 KW Hybrids plus 3 x 10 KWh Batteries LV Topsun. Price was not even 50% of the Quote for the two Huawei Batteries.
Hello! The Deye hybrid inverters might be a good fit for your system because they have been receiving good reviews, particularly for their dependability and efficiency. Your 15kW battery pack should be compatible with a Deye 15kW inverter, as these systems are frequently commended for their simplicity of connection. It’s also worthwhile to think about local warranty services and support because you’re in Greece. Other companies that provide high-quality hybrid inverters that work well with large-scale home systems are SMA, Fronius, and Solis. You might want to look into these as well. Before choosing, make careful to evaluate the features, effectiveness, and post-purchase support.
DEYE is very popular on every market, depends on your budget. As far as i know it requires a very skilled installer to make it work as intended.
For very unbalanced load look first at Victron. Only cons is you require 3 inverters for each phase, but regardless of load you have an inverter to load up, even though load is 3p. Also compatible with any battery brand, even EV batteries.
Second brand would be SOLAX, cheaper than Huawei. But follows same logic, only compatible with SOLAX batteries, but offers a wider range of batteries products. Works very well with heat pumps in automation. With Solax you can always extend your max capacity. Kinda expensive but ULTRA model offers unbalanced load and 2 batteries out on the inverter.
For more information, please visit three phase hybrid inverter.