Coolfx's powerwall

To high load for the fuse?
 
No way, I only have a 2424MSXE so 100A maximum at 24V, as my battery was over 25.2v and solar was pulling around 40A it was only about 50-60A discharge from battery bank. Water heater is 1800w and nothing was used or just maybe the fridge and freezer kicked in, but they are new/efficient models with really small power compressor and no big load at start, together they don't exceed 120w.
 
China fuse/breaker? Poor contact between the cables and the fuse?

Other than that dunno unless something did short it on the other side. But if it was the inverter that should have been damaged

Doesnt that inverter do 5kW burst? If so thats 200A.
 
Yes cheap fuse, so i think it's maybe overrated, not too bad, I prefer in that way with a fuse.
It was marked by the connector due to the pressure so contact seems good.

Yes surge is 2x rated power for 5sec, but nothing was able to ask so much or even close.

Now I think the fuse melted due to overrating and maybe the buck converter fried trying to step up very low voltage coming from the PIP's caps after the shutdown. As you said, it's not the PIP as it work fine.

The buck cannot burn the 200A fuse as it would have melted the wire way before(no other fuse before that buck, other have but not that low power one).

That fuse worked fine for few month, did 90-95A for few minutes every morning with computer and water kettle (2200w) without problem.
 
7.5kWh on wheel !
I finished the packs for 7.5kWh yesterday and wanted to build a shelf before puting it into service ,it was becoming messy with so much packs under thedesk and the PIP horizontalyon untested packs...



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I'm pretty happy of it even if I failed and put too much space between packs so I lost one slot :sillyme:

This week Ihave 12 more 215wc panels to put on the roof for a total of 21. It wil be too much for the smal 2424msxe, I'm thinking about buying a 5048 as 24v test setup gavegood results.
 
This happened today, I forgot the electric kettle was in use and started the microwave, I realised my mistake after maybe 30sec but no shutdown from the PIP. I went upstair to check and the 2424msxe was using 120+A from the batteries as they are no sun at all today.

It was no peak, it worked for a few minutes until the microwave had done. This is rather impressive from a 2.4kw unit. It wasn't even hot.



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Some times the best results come from accidents :) Take the transistor for example, mathematical error led to a whole new world.
 
I don't really want to push it too much, maybe it can handle 3kw ore more but I don't want to have to experience Mppsolar RMA...
I plan to sell it and buy a 5048.

Now I have 7.5kWh of batteries it's much more enjoyable to use, no more big voltage drops and increased capacity offer the possibility to run the water heater easily.
 
Their units. Atleast the pip series will handle some abuse. My 4kw have been running 6kw loads..... accident yes but it ran it for several minutes and thats good to know.
 
Yes, it's a good news to know they can handle it, but at the same time are thoses overcharge safe foe the units ? if it is safe it's good for us, but if it's just resulting of a poor overcharge protection and can damage the inverter it can be a problem.
 
I think a lot of the base numbers are like tire inflation numbers. They are the manufacturers recommendations for best performance of the time under normal conditions

However, under certain conditions, it's better to under/over-inflate a tire. And, over-inflating can actually give you better fuel efficiency; however, there is a trade off of slightly longer braking distance. On another forum I was on, a tire manufacturer rep said that it would be safe to double the printed number on inflation. But, not recommended due to it being extremely rough and wear out the tire faster.

So, with these inverters, it's recommended to run at X-Watts with a heavy load of 2X-Watts for a brief time. So, if they are designed to run for 10seconds (guessing a number here) at 2X-rated, then running at 1.5X-rated should be able to go longer time. Flat progression of time, or curved? That I couldn't say. Would it be 15seconds, 20seconds, or 30seconds under 1.5X-rated.
I think it really comes down to the dissipation of heat under those loads. If you can keep the unit cooled off, then it can handle the higher loads easier. So, important to make sure there's plenty of air flow; maybe even knock a hole in the side and add another case fan to help out. (squirrel cage fan perhaps?)
 
I know a bit about this as i'm an extreme overclocker(had I7 6700k at 6.4Ghz and I3 6100 passed 6Ghz under Ln, did that since more than 10 years), cooling is the most important when you want to overvolt/overcurrent electronic, especially semiconductor.

But, as we are able to push cpu at 6Ghz and 2v under liquid nitrogen(-196c), it's instakill to try 2v under aircooling or watercooling, even if it's not running hot and few seconds with no charge. As electrical losses are impacted by temperatures and voltage, so if you higher a lot voltage, you have to run the chip a lot cooler than it's supposed with stock spec(even if the device product more heat than before) to run it stable/safe.

Si if this apply to power transformer, it can be unsafe to sue them outside a small margin from the manufacturer spec, especially with cheap products as Mppsolar's. Maybe they are badly designed and are already running close to the max spec of some components, or are they capable of a lot more, who know ?
 
The are close to max spec in terms of Voltage. But the PIP series is said to cope with 2x surge without issues. MPP may be cheap brand but the rating they state to work fine. Just beware of that its only the PIP series that does this and some newer series like the hybrid has no surge. (Atleast not specified)
 
Wow, 6.4Ghz. Nice! :) Altho, i'm an AMD guy myself ;)

I agree with that. It's also possible that something that's a china knockoff is also running at near peak ability.

What I was thinking of doing with my transformers was to putt some heatsink fins on them to help with dissipation. I "think" it would work, but not entirely sure and to what level. Have to remember that the transformers have enamel on them and that might impeded transfer. Might be able to scrape it off where the heatsink would go, but not sure how it would react.
Also, would putting another piece of metal affect the transformers work? After all, it's a piece of metal that has magnetism working in it's favor. Any metal can create magnetism when electrons flow through/around it. Even aliminium might have an adverse affect on the magnetic fields. Hmmmm, I think there's an experiment brewing here *ponders* Though I dont have an oscilloscope, magnometer (or what ever that's called) and some of the other stuff needed to do the work.
 
daromer said:
The are close to max spec in terms of Voltage. But the PIP series is said to cope with 2x surge without issues. MPP may be cheap brand but the rating they state to work fine. Just beware of that its only the PIP series that does this and some newer series like the hybrid has no surge. (Atleast not specified)
Click to expand...

But, do you know if they are soem protection behind this surge feature or does it risk to blow off ? I already tested a infinite output and it shutdown, no problem at all(had the output accidentaly connected to the grid).

But I don't know the limit for the surge, is the 2X the value for the automatic breaker and under that it let it output as long as it don't overheat ? Is their any timing like 2x=5s, 1.5x=1min, 1.2x = 10min ?

I didn't wanted to say they are badly designed, just it's cheap to buy so we already have good product for our bucks with stock spec so I never expected more of theses Mppsolar.
Korishan said:
Wow, 6.4Ghz. Nice! :) Altho, i'm an AMD guy myself ;)
Click to expand...

http://hwbot.org/

if you want to see some crazy stuff :))
 
I dont know m8 :) And their support have no clue and dont want to answer me. Mailed them several times last year asking but never a single answer. They only state "Read the manual...."

I doubt there are much logic built in but still it could easily be done if the software were done properly. You should if using mpp, design the system to protect from it.. unless you want to test it. :) I mybrid that does max 3.3kw have i had up to 5kw over 10 minutes without issues... But still dunno...
 
I gave up asking stuff to the support, they never even replied to me.


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Today I started to build the second part of the structure for the last 12 panels, it just need the part going on the other side of the roof.
Not a single hole in the roof, like the previous one, it's just gravity holding it and it work very well, had 90+km/h wind and didn't event ear it shaking.
 
wow, novel idea, with super thin panels.

How are you managing up draft on the panels if it gets windy? I know it less of an issue on pitched roofs, scallion, but could be an issue?
 
It could be a problem in some country with hurricanes but I'm in Belgium which don't have high winds over 120km/h. And I live in a valley with a lot of trees around so not a lot of wind can reach the house. We had 90+ winds few months ago and panels didn't even shaked.

THey are thin, mounting structure is 3mm thick so ne space for the wind between them and the roof, as I have structure on each side of the roof, the only way it can fly away is by elevating verticaly for 3m before moving away, if this happen, I'm sure my car will be upside down too :D
 
very nice panel installation :) . I also thought about this way, since I don't own the house I live in and can't modify the roof. But since I'm a little afraid of heights, I didn't do it, yet. And I like the thin panels, can you give us more details on them (brand/model)?

Have sun!
Oliver
 
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