iMeshbean® 12V 300W 300 Watt Micro Grid Tie Power Inverter Solar MPPT Expedited Shipping USA Seller
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- Normal AC Output Power:250W; Maximum AC Output Power:300W
- AC Output Voltage Range: 90V ~ 130V; DC Input Voltage Range: 10.8V ~ 30V; Total Harmonic Distortion(THD):<5%; Power Factor: 0.99
- AC Output Frequency Range: 46Hz ~ 65Hz. Peak Inverter Efficiency: 92%; Output Current Waveform:Pure Sine-wave; Standby Power consumption:<0.5W
- Features:MPPT Function/Over Current Protection/Over Temperature Protection/Reverse Polarity Protection/Island Protection/Stackable
- Package Includes: Power inverter and Power cord
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SUN-250G: B004TVEF8Y, Wind-250G: B008BDAQDY
Wind-300G (10.8V ~ 30VAC): B007WQBK2C,Wind-300G (10.8V ~ 30VDC): B005N2OLZU
Sun-500G: B008CNM1SQ, Sun-S500G-HI: B005N29SGM
Wind-500G (10.8V ~ 30VAC): B007WQDKMA, Wind-500G-HI (22V ~ 60VAC): B007X0L2C0
Wind-500G (10.8V ~ 30VDC): B005N2ST9E, Wind-500G (22V ~ 60VDC): B007X0OVGO
Sun-600G: B007XAEINU, Sun-600G –HI (10.8V ~ 30VDC): B005N2VLO4
Sun-1000G-HI (10.8V ~ 30VDC): B007XAP0V4
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The only plug and play small grid tie photovoltaic system;The stackable small grid tie photovoltaic system
Normal AC Output Power: 250W
Maximum AC Output Power: 300W
AC Output Voltage Range: 90V ~ 130V
AC Output Frequency Range: 46Hz ~ 65Hz
Total Harmonic Distortion(THD): <5%Power Factor: 0.99
DC Input Voltage Range: 10.8V ~ 30V
Peak Inverter Efficiency: 92%
Standby Power consumption: <0.5WOutput Current Waveform: Pure Sine-wave
MPPT Function: Yes
Over Current Protection: Yes
Over Temperature Protection: Yes
Reverse Polarity Protection: Yes
Island Protection: Yes
Package Includes：Power inverter and Power cord
Operating Temperature Range: -10 ~ 45 centigrade
Top customer reviews
- The best efficiency I've measured is about 80-85%, not the 90%+ listed in the spec
- Running 2 100W panels in parallel on a single inverter nets me about 125~130W output
- Running 1 100W panel by itself on each GTI nets me about 70W each or total of 135~140W combined
- Repeated measurements over varying sunlight conditions show me these units run most efficiently when they only have a single panel attached to them.
Just a heads up to avoid disappointment! My panels are spec'd at 100W each in 25C ambient lab conditions; in reality it's less due to temperature derating. At midday in June, I was measuring the backside of my panels to run about 55C. With a 0.5%/C derating above 25C ambient, the panels can theoretically put out only 85W. Considering the GTI efficiency to be about 80-85%, max power from my panels is only about 70% of the panel rating, best case. In my 200W panel setup, I can only expect to get at best about 140W, tops in the middle of the summer. Most of the time, I see 130-135W more than I see 140W
I opened my SUN300G and compared its innards to pictures of the SUN250G. Both look identical and I'm not sure what the difference really is. There is a single 35V, 4700uF aluminum electrolytic capacitor for filtering on the front; it seems to be a bit undersized and underrated. I see over 2-3VRMS of 120Hz AC ripple on the input when I'm running both 100W panels in parallel, and it probably explains why the cap runs warm (not good for longevity) I attached a single 1000uF cap on the terminal lugs and it brings the ripple down a bit while squeezing about an extra couple watts out of it. Ironically, a 10000uF cap cleaned up the input ripple quite a bit more, but it yielded about 4-5W less output. I surmise the MPPT is measuring peak input voltage rather than an average DC input.
If I was to do it again (I probably will), I'd probably buy the SUN250G and attach a single panel to each since the biggest 12V panels don't come in anything much beyond 150W.
[update 4/25/14-- I have been running 4x 100W panels on 2 SUN300G inverters. I'm getting about a typical 240-260W maximum post AC-conversion at noon. The highest I've seen was about 280-290W on a cold, clear day in March. With the panels in a fixed position (non-tracking), I'm averaging about 1.5KWH going into the house mains on a cloudless, sunny day here at 37degrees latitude. Assuming $0.16/KWH, I'm generating myself about $0.24 of power a day. It'll be a while before I break even. LOL ]
[update 5/15/15 -- Still working flawlessly! Since I've got these mounted under the panels outside in the backyard and not really 100% weatherproofed enclosure, the purple sticker on top of the unit is a bit faded and wrinkled. Ugly but no big deal. I think one of the unit's fan bearings are starting to make some noise]
I only gave this unit 4 stars, as I was a little disappointed that it would only produce 130Watts with a 12v input. I suspect that If you want to get the full 300 watts out, you would need to supply it with the 30v it's spec'd for.
But that being said with a 400 watt input you can get at least 230- 250 watts on the output to use in your home.
Also if your 12volt panels have a open voltage of 18volts well times 2 is 36volts not sure about this one but i would expect it to be the same way being it is made by the same company. The inverter will not work with 36+ volts the max on this is 30volts so safe to say this model is for 12volt ONLY. Mass power needs to lower the max voltage to improve on efficiency. I was really hoping to get 250 watts out of this with a 300 input but NOOOOOO i got 156 watts instead boy was i mad.
Another thing to expect as well if you over due your output over 250 it will drop to 0 output to cool off then start back up so FEED it enough to get 250 output or close but no more then that and it will not pause working to cool off.
Most recent customer reviews
the same inverter from DC HOUSE burn up in smoke the first day
and got zero costumer service