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I wasn't addressing lensing/reflections etc, I was addressing the temperature coefficient calculation. That is garbage. If you want to give examples where a margin is valid, that's fine. But the re-rating due to assuming max irradiance at annual min temp is not realistic.

I'm aware of that calculation, but I'm also aware it's of no use. Panels will never see stc irradiance at the lowest ambient temp for my location. Because that temp was at 4am in winter. The whole process of calculating that voltage is stupid. The only time voc is encountered is on mppt startup...

No need to continue this thread.. I found a great deal on a pair of Growatt SPF5000ES inverters locally.

Why? The only component I can see that could be affected would be a DC contactor. Does anyone actually know what happens if you exceed the rated PV, or have an array with greater Isc than the inverter's Isc max? I'm interested to know. It's really a moot point. I said that in response to that...

That's the title, but it is not the entirety of the topic. Please read the first paragraph of my initial post. You have jumped in and talked about inverters that my initial post did not ask about. Then you have brought up Victron, which costs almost 4x the EASun/MPP units, has lower charger...

Right, well that's not even the unit this thread is about, nor the one you linked to in the video, nor is it built by the same manufacturer. I am talking about Voltronic units. Specifically ISolar-SM-IV-5.6KW. So... read the manual?

For the price difference, 15W is nothing. 0.36kWh per day. Victron also has no charge controller in the unit. And their charge controllers are low voltage which are basically worthless today.

Yeah I did... he gives no reasons and I have no respect for his opinions.

Why would you not put more than 4800W of panels on it? He says "for obvious reasons". Uh, no, there are no obvious reasons. You can happily put a shitload more panels on any MPPT as long as you don't exceed Vocmax. This is common practice to get max output across more hours. Exceeding Iscmax is...

Thankyou very much for your post. I was looking at this seller.. think I will probably buy from them. https://easunpower.com/products/pre-sale-easun-power-hybrid-solar-inverter-11.2kw-230vac-mppt-120a-solar-charger-pv-input-6000w-450vdc-led-ring-lights-touchable-button-ship-from-eu

What's the frequency? Can you shut down the inverter and still see the voltage? Do you have another load you can put on the panels with the inverter off? A properly sized resistance should do it. Do you have any connection between the string wiring and the panel frames? Where are the panels...

I have read a handful of comments where people ask if EASun and MPP are the same product internally. There have been a few replies stating that "the internal components are lower quality". I am very skeptical. Does anybody have any actual knowledge that EASun is not the same product? I am aware...

You need to get someone else to do this.

You haven't said what you were testing the voltage across, how your system is laid out etc. I'm not sure you should be doing this.

This has to be either a high resistance joint in the housing, or you shorted the panels through the fuses.

Tell me about it. The 6.5TD block in my GMC cracked after 200k miles. 7500 USD to have a basic rebuild in a replacement block. Dog of a motor. Transmission is coming up for rebuild now, gonna be another $3k. $10k for a battery doesn't look bad at all.

Nobody ever said those things about the vaccine. They said it reduced likelihood. And it has. And there have been new variants. But then I completely expected you to be an antivaxer too. Why are you hanging out on an alternative energy forum? There are plenty of places that are more likely to...

So no mention of how you pulled "it rarely gets below 32F" out of your ass?

Yeah do you not see where Oslo spends 4 months averaging below 32F on your own graph?

At least you're honest that you prefer to ignore data. That's something I guess.

lol https://weatherspark.com/h/m/68697/2021/12/Historical-Weather-in-December-2021-in-Oslo-Norway#Figures-Temperature Looks fairly similar to Minneapolis. What do 84% of Norwegians know that your brother doesn't...

This one always makes me laugh.. "EVs just won't work in the cold weather!" Norway. 80+% of car sales in the middle of winter are EV. "Oh."

Every model of EV available here is on back order.

Also, in the next 5-10 years, battery energy density will increase to the point where those use cases are covered too. By the time we next switch vehicles, there will be a suitable EV for virtually everyone.

I didn't say "every". The vast majority of car usage patterns in the US fit EVs. My point was to correct "some" to "most". The studies are done, it's clear data. There is no reason to not move away from oil asap.

People ARE clamoring to get them. Have you not noticed the huge waiting lines for most models? Ford has already sold years of the F150. Tesla has waiting lines for every one of their poorly engineered models. Hyundai. Porsche. VW. Everyone. Taking deposits. What does it tell you when people are...

Run and hide, baby.

Oh do tell me about the times you've stood out the front of Disneyworld protesting. Or out front of every single Amazon fulfillment center protesting. Or any corporate HQ in any city, because they all got tax breaks. Or basically any shopping mall. And tell me about when you protested against...

Man you must HATE fossil fuel companies then. Have you looked at the amount of subsidies they receive? Using the tax system to steer behavior is bad? Are you out there protesting the federal tobacco tax? They're punishing bad behavior! How dare they try to get in the way of good healthy...

I'm a hippy huh.. first hippy I ever saw with two dozen V8s in his shop. Did you watch the video I linked? Do you understand that just because you have peak issues, doesn't mean your grid can't happily support charging a ton of EVs at non peak times? The facts are all laid out in the video. But...

Who's baking their dinner every night? I too run my AC mostly at night and until the morning rate switches. It's much cheaper. I think they're going to move it to peak being just like 4pm to 9pm here too because of all the solar.

And isn't that because of peak loads of AC? Yeah, you can charge your EV at off peak times. It's actually good for the generators and lowers the cost of energy on average. https://www.azfamily.com/2022/07/12/srp-customers-break-power-usage-record-during-hottest-day-year/ "The utility said the...

Well, firstly, I'm a qualified electrical engineer. So the math isn't that hard for me. Secondly, there are other engineers who have done the math for me and made it into nice presentations. Combining those, I used evidence and science instead of just saying "tHaT'S aBsOlUtE NoNsEnSe" with...

Wolf-gang: chill. The original poster never said if they bought Luyuan's "Grade A" cells, or their "Non Grade A" cells. My understanding from reading Amy's posts is their "Grade A" product is the EVE certified EV grade cells. Their "Non Grade A" are the cells that did not pass EV certification...

The Bolt is like $26k brand new. There are now quite a few affordable models. Look beyond Tesla (who I HATE). The base F150 is going to be like $39k. I believe that's less than the price of the average new car sold in the USA. The grid can support widespread EV use, and it can support total EV...