|Item model number||SUN-500G-HI|
iMeshbean® New 500w Small Grid Tie Power Inverter Converter for Solar Panel System 22-60v Dc to 110v Ac
- Normal AC Output Power:450W; Maximum AC Output Power:500W
- AC Output Voltage Range: 90V ~ 130V; DC Input Voltage Range: 22V ~ 60V; 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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More Models are available
SUN-250G: B004TVEF8Y, Wind-250G: B008BDAQDY
Sun-300G: B005N2WHDI, Wind-300G (10.8V ~ 30VAC) : B007WQBK2C, Wind-300G (10.8V ~ 30VDC): B005N2OLZU
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
The only plug and play small grid tie photovoltaic system; The stackable small grid tie photovoltaic system
The individual system of SGPV is shown in Figure 2
1,Installing the solar panel of the SGPV at a suitable location that sunshine can irradiate on it.
2,Connecting the cables of the solar panel to the DC input terminals of the small grid tie inverter of the SGPV, inserting the plug of the inverter into the socket of the home grid.
3,When the sun shines, the SGPV will convert the solar energy to the home grid.
SGPV can be stackable, and all SGPVs are independent each other. The total power converting to the grid is the total power of all SGPVs. The installation of each SGPV is same. Connecting large quantity of SGPV to the grid, this will construct high-power grid-tie system.
Top customer reviews
I bought one Grid Tie Inverter 500W 24-52V here on Amazon.
I bought the Solar Panel wires and the MC4 plugs here on Amazon.
I bought the Sockit box, and placed the inverter inside it. The inverter stayed dry through Hurricane Sandy, so I'd say the Sockit box is waterproof.
It works. I'm getting 178W 1.5A input as measured on Kill-A-Watt.
Compared to running the 2 panels with their own SUN300G inverters, running the 2 panels in series on the SUN500G yields less output power. In mid-summer (37 degrees latitude), I was pulling about 135W from 2 SUN300Gs combined. With both panels in series on this SUN500, I was lucky to get 120W. Overall efficiency is higher with the SUN300G. Not sure what the deal is.
Being a HW guy, I naturally opened up the unit to get an idea of what's inside. Besides noting the box is much bigger than it needs to be (it's huge), I was absolutely shocked to see there's nothing holding the main board to the chassis other than the pins of the FETs and diodes which are the only things screwed to the chassis. There are no screws on the main PCB to secure the board's mass to the chassis, and considering how heavy and massive the inductors are, I'd be wary of long term integrity if the unit is subject to any vibration. There's some sloppy mess of glue dripped across one length of the PCB where it sits on a ledge along the chassis to help stick it together also. (Not sure how to post pics, otherwise I'd put one here and you'll see what I mean)
Overall, it works, but I'm not terribly impressed with this unit. Maybe the SUN500 is tuned to work more efficiently with 60cell panels compared to 2 36-cell panels in series which is perfectly within operating spec (22+22=44VDC open input voltage); my SUN300Gs seem to do a better job in that regard.
[update 10/29/13 -- For kicks, I did some bench testing with 2 12V lead acid batteries in series. 24.5VDC at 11.5A input nets a 233 +/-2W output as measured on a KillAWatt. That works out to be about a 83% efficiency (not the 92% spec). Power factor is 0.73 (not 0.99 spec).
I modified my KillAWatt with a TweetAWatt radio (now there's a cool weekend project) so I can observe the voltage and current waveforms remotely and do all sorts stuff with the data. Contrary to what I would have expected, there are 2 pulses of power per half-AC cycle hence explaining the lower PF.
Input ripple measured at the input terminals while running on these batteries is approx 300mVrms @360Hz which is better than the 2V+ ripple on my SUN300G while running on panels. I surmise the output impedance of the batteries is lower and hence the lower ripple and better efficiency than what I was measuring earlier with panels. I'll go back outside and confirm one of these days
[update 11/26/14 -- I bought myself a 250W 24V panel and have been running it on this inverter for about 6 months now. Best efficiency I've seen so far is about 65%. Conclusion is, this inverter works better with a 24V panel versus 2 12V panels in series... Clipping a 10000uF 50V electrolytic that I had lying around on the input bumps out output power by about 5-6W in full noon sun. I'll modify it since there's ample space inside the box and see how it works longer term
[update 6/30/16 -- I unfortuantely want to downgrade to 2-stars. This unit still works flawlessly, but the efficiency is terrible. I replaced this unit with a WVC300 running the same 24V panel and saw my output jump from 110W to about 150W during noontime with clear sky and full sun. ]
My power company is giving me a bad time over it - needs UL or other certification for grid tie in.
So this will be a problem that you will need to consider.
If anyone has solution, could use answer.
Most recent customer reviews
2) doesn't give you any recognition how well it's working
I'm not satisfied.