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MPPsolar, EAsun/Powland, Axpert etc. are they really identical?

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the_german

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Apr 20, 2022
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This is my first post in this community.

Hello you nice hard-working people :)

I own an MPPsolar 7248MAX and would like to expand the system with a second device. The 7248MAX model is no longer available. According to MPPsolar support, the 7248MAX can be used in parallel with an 8048MAX. The 8048MAX would notice this and then behave like the 7248MAX.
So far so good.

In Germany I can get an 8048MAX for 1700.- including shipping and customs. That's 700 euros more than I paid for my 7248MAX. Now I've seen and read that the devices from EAsunpower/Powland, Axpert etc. should be identical in construction to those from MPPsolar. The manufacturer is said to be VOLTRONIC.
However.

Now to my actual question. are they really identical? Is the firmware also the same? MPPsolar claims they are all clones. The sellers of these alleged clones say that would be nonsense and the devices come from the same factory.

Can I mix devices that are obviously identical in construction? I would like to buy the 8000 watt model from EAsun. The appearance and the device data are exactly the same and I can buy such a device for a significantly lower price in Germany.

I'm curious what you write about it.
greetings from Germany
 
they are not.
while they are possibly made by the same oem, there is a component quality difference between their a brands ( voltronics/mpp solar/voltacon/sp24/mercer)
and their b grades ( powmr/easun/powland)
this is even without service ( non excistent for b brands)
if you are from germany, i highly suggest you take a look at the italian importer (solarpower24.it) or uk/es importer (voltacon) .
the price difference for the same inverter is minimal, but you are entitled to eu warrantee and support.

above would also be the reason i didnt buy mpp solar again, using the b brands never even crossed my mind
 
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houseofancients said:
they are not.
while they are possibly made by the same oem, there is a component quality difference between their a brands ( voltronics/mpp solar/voltacon/sp24/mercer)
and their b grades ( powmr/easun/powland)
this is even without service ( non excistent for b brands)
if you are from germany, i highly suggest you take a look at the italian importer (solarpower24.it) or uk/es importer (voltacon) .
the price difference for the same inverter is minimal, but you are entitled to eu warrantee and support.

above would also be the reason i did buy mpp solar again, using the b brands never even crossed my mind
Click to expand...
Well, that's finally an answer I can start with.
I looked directly and unfortunately the dealer in Italy doesn't have as full stock as I would like and you can at least pre-order from the one in the UK. Supposedly new goods will arrive in April.
The prices are ok too.

Thank you very much for your answer. Be the force with you... :)
 
houseofancients said:
and with you, young padawan ;)
Click to expand...
Master I followed your advice and purchased a Voltronic 7248MAX from UK.

The device has already arrived in Tatooine..sorry Lower Saxony. In 10 days I will also have 32 280A LFP cells and 60 used 230WP PV modules are already stacked in the yard. So I can complete my power plant.

Master I am very glad to have followed your advice :)

p.s. My private energy transition would then actually be complete. I have been heating with my own wood for years and will generate my own electricity in the future. I'll say F**k U Darth Vladimir :)
 
seems you're well underway :)
make sure you pay attention to.string voltage.
you can overpanel each of the mppt's a bit, just dont overdo it

what bms did you get ?
 
also, make sure they are both running the same firmware, otherwise the clustering/stacking will give you all sorts of nonsense
 
Yes, but there isn't that much soldering work.
I had the PCBs produced by jlcpcb already assembled as far as possible. The few ICs that I had to solder myself did not present any hurdles. I would also trust anyone who has halfway a functioning hand-eye coordination. As a Jedi you have them anyway :)
There were a few IC's not. e.g. the INA228 and the LM5009A. I got these myself. The little bugs are difficult to solder without experience, but that was only 3 or 4 parts in total. If you can't solder them, go to one of the many smartphone repair artists. They do it with one hand and 40 fever :)

With Stuart's project you have a system that can be compared to the Battrium system. The relay for "dropping" the batteries is a 300A DC relay from yacht construction, optionally the relays (closer) also go from an electric forklift.

By the way, Stuart just released a new revision of the ESP32 controller board. Now that I've just finished my controller :)
 
the_german said:
Yes, but there isn't that much soldering work.
I had the PCBs produced by jlcpcb already assembled as far as possible. The few ICs that I had to solder myself did not present any hurdles. I would also trust anyone who has halfway a functioning hand-eye coordination. As a Jedi you have them anyway :)
There were a few IC's not. e.g. the INA228 and the LM5009A. I got these myself. The little bugs are difficult to solder without experience, but that was only 3 or 4 parts in total. If you can't solder them, go to one of the many smartphone repair artists. They do it with one hand and 40 fever :)

With Stuart's project you have a system that can be compared to the Battrium system. The relay for "dropping" the batteries is a 300A DC relay from yacht construction, optionally the relays (closer) also go from an electric forklift.

By the way, Stuart just released a new revision of the ESP32 controller board. Now that I've just finished my controller :)
Click to expand...
well, it's not they hand eye coordination that failed, rather the eyes ;-)
after messing up 2 boards, i figured i should leave it to the profi's ;-)
since diybms does support inverter coms over canbus and rs485, you could petition stewart for a pylontech over rs485 ...
that would open up a whole new ballgame
 
the_german said:
I do not understand what you mean. What do you expect from a Pylontech integration?
Click to expand...
well, what you want is you bms feeding your inverters correct information like % SOC to taper charging when almost full, provide a single interface so one can pull info for monitoring, shut down before emergencies on cell level occure etc etc etc
 
the_german said:
This is my first post in this community.

Hello you nice hard-working people :)

I own an MPPsolar 7248MAX and would like to expand the system with a second device. The 7248MAX model is no longer available. According to MPPsolar support, the 7248MAX can be used in parallel with an 8048MAX. The 8048MAX would notice this and then behave like the 7248MAX.
So far so good.

In Germany I can get an 8048MAX for 1700.- including shipping and customs. That's 700 euros more than I paid for my 7248MAX. Now I've seen and read that the devices from EAsunpower/Powland, Axpert etc. should be identical in construction to those from MPPsolar. The manufacturer is said to be VOLTRONIC.
However.

Now to my actual question. are they really identical? Is the firmware also the same? MPPsolar claims they are all clones. The sellers of these alleged clones say that would be nonsense and the devices come from the same factory.

Can I mix devices that are obviously identical in construction? I would like to buy the 8000 watt model from EAsun. The appearance and the device data are exactly the same and I can buy such a device for a significantly lower price in Germany.

I'm curious what you write about it.
greetings from Germany
Click to expand...
People throw out the term voltronics as an oem but srne manufacturers a complete different branch of inverters
 
houseofancients said:
srne doesnt make 8 kw.
the discussion here is on the different 8000 max inverters
Click to expand...
www.srnesolar.com

Split Phase Residential Storage lnverter 8KW-10KW - SRNE Solar

ASF series All-in-one Solar Charger Inverter Rated Output Power 8,000W/10,000W Rated Output Voltage 120/240Vac Rated Battery Voltage 48Vdc
www.srnesolar.com

I guess they don't have any 8k. Honestly one part of the thread, first post asks about manufacturer being all voltronics. Yes he specifically is interested in an 8k unit. I know smaller EAsun units include sSRNE units so is it such a stretch to think their 8k offering might be from SRNE OEM?
 
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