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RegGuheert
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SolarEdge HD-Wave Inverter Technology

Sun Oct 25, 2015 6:52 pm

SolarEdge has announced their new HD-Wave inverter technology which greatly reduces inverter size and weight while simultaneously increasing the efficiency to above 99%:
SolarEdge wrote:Inverters are the “brain” of the solar energy system, because they convert solar power into usable energy and are measured by size, efficiency, and reliability. While advances have been made in the solar inverter space throughout the years, the large size of magnetics and cooling components have significantly limited any leapfrogging in the inverter space. SolarEdge’s new HD-Wave technology will dramatically reduce the size of the inverter's magnetics by means of advanced digital processing. At the same time, the new technology is designed to increase reliability and optimize the performance of solar energy systems to 99% efficiency and beyond, an increase that will provide more solar power at lower cost.




I'm wondering if this inverter is designed to meet Google's $1M Little Box Challenge. Winners of the challenge will be announced in January, 2016. Here are the specifications for the Little Box Challenge:
Google wrote:- Must be able to handle up to 2 kVA loads
- Must achieve a power density of equal to or greater than 50 W/in3
- Must be able to handle loads with power factors from 0.7–1, leading and lagging in an islanded mode
- Must be in a rectangular metal enclosure of no more than 40 in3
- Will be taking in 450 V DC power in series with a 10 ohm resistor
- Must output 240 V, 60 Hz AC single phase power
- Must have a total harmonic distortion + noise on both voltage and current of < 5%
- Must have an input ripple current of < 20%
- Must have an input ripple voltage of < 3%
- Must have a DC-AC efficiency of greater than 95%
- Must maintain a temperature of no more than 60°C during operation everywhere on the outside of the device that can be touched.
- Must conform to Electromagnetic Compliance standards as set out in FCC Part 15 B
- Can not use any external source of cooling (e.g. water) other than air
- Does not require galvanic isolation

In any case, SolarEdge's new inverter technology looks like it may be a significant breakthrough.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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RegGuheert
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Re: SolarEdge HD-Wave Inverter Technology

Mon Oct 26, 2015 11:54 am

Here's a presentation with a bit more detail in it. It was linked from this article.

The presentation indicates that they have also eliminated the electrolytic capacitors from their design, which should allow them to extend their warranty.

But I calculate a density of 5.5 W/in^3 for their 7600-W inverter, which is about an order of magnitude lower than what is required to win the Tesla competition. Perhaps they are building a non-product version to try to compete in that.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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RegGuheert
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Re: SolarEdge HD-Wave Inverter Technology

Wed Aug 17, 2016 4:08 am

I was looking at the page for the HD-Wave inverter and noticed an interesting feature bullet:
SolarEdge wrote:Optional self-sustaining power outlet supplying up to 1.5kW backup power
That sounds like a very attractive option! Does anyone know more about it?
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

dhanson865
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Re: SolarEdge HD-Wave Inverter Technology

Wed Aug 17, 2016 2:27 pm

RegGuheert wrote:I was looking at the page for the HD-Wave inverter and noticed an interesting feature bullet:
SolarEdge wrote:Optional self-sustaining power outlet supplying up to 1.5kW backup power
That sounds like a very attractive option! Does anyone know more about it?


If I remember from when I watched the video months ago it provides one 15a or 20a socket that will give you close to 120v with little or no buffering (no battery backup, the only buffer would be from the capacitors and other electronics that rectify the power) so that single socket can power a refrigerator or trickle charge an EV. But I think the socket only comes on when the main grid tie power drops out.
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RegGuheert
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Re: SolarEdge HD-Wave Inverter Technology

Wed Aug 17, 2016 2:52 pm

Thanks! That's always been one of the most frequently-requested features for grid-tied inverters: "Just let me have some power when the sun is shining!"
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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keydiver
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Re: SolarEdge HD-Wave Inverter Technology

Thu Aug 18, 2016 6:20 pm

I believe most of the SMA TL (transformerless) inverters also have that option. I plan on installing one on my parent's house later this year. Backup power in south Florida can come in handy.
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RegGuheert
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Re: SolarEdge HD-Wave Inverter Technology

Fri Aug 19, 2016 5:03 am

keydiver wrote:I believe most of the SMA TL (transformerless) inverters also have that option. I plan on installing one on my parent's house later this year. Backup power in south Florida can come in handy.
Please try that feature out and let us know how it works once you get it installed. TIA!
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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Marktm
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Re: SolarEdge HD-Wave Inverter Technology

Fri Aug 19, 2016 1:47 pm

RegGuheert wrote:I was looking at the page for the HD-Wave inverter and noticed an interesting feature bullet:
SolarEdge wrote:Optional self-sustaining power outlet supplying up to 1.5kW backup power
That sounds like a very attractive option! Does anyone know more about it?



Reg;
Thought I answered this a couple of days ago - must not have hit the submit!

I have the SB-4000 TL/US with the secure power supply (SPS). I have tested it to charge my 48 volt golf cart batteries (and a spare set) . The OEM charger required about 900 watts at full charge rate and gradually drops off. The SPS does a great job of keeping the charger on-line , actually seems to drop the charge rate if the solar production drops - within limits. It will cut-off when the solar production drops below around 400 watts during charging. I tried the SPS with full solar production and it will cut itself off if I put much more than the rated 1500 watts load (~1800 watt heater strip). It does reset itself automatically when solar production comes back - takes 10+ seconds.

I'm currently installing a 3000 watt PV system and plan on using the SB-3000 (SMA). The SolarEdge looks interesting - smaller, more efficient. I cannot find any pricing/availability. Anyone able to get more info??
2012 Leaf SL; 34,000 miles. 12 bars - Battery replaced November 1st, 2016.
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RegGuheert
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Re: SolarEdge HD-Wave Inverter Technology

Fri Aug 19, 2016 4:18 pm

Thanks, Marktm! That sounds very useful!

While I'm a fan of microinverters, this is one feature they currently do not offer.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

QueenBee
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Re: SolarEdge HD-Wave Inverter Technology

Fri Aug 19, 2016 9:26 pm

RegGuheert wrote:Thanks, Marktm! That sounds very useful!

While I'm a fan of microinverters, this is one feature they currently do not offer.


It can be done easily enough just not cheaply. I have a friend who really wants to do this but I don't think he ever will as it just costs too much.

http://www.outbackpower.com/index.php/a ... c-coupling

http://www2.enphase.com/global/files/En ... ystems.pdf

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