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Anyone using a SofarSolar ME3000SP inverter
#1
Hi all,

New here, just registered after doing alot of surfing in relation to sing 2nd life batteries as storage solutions, and was drawn here.

I have a 7.5kw solar array, 3.5kw on east elevatio and 4kw on west elevation.

Looking to get into a phase 2 project of battery storage. Ive already got the battery, its a Lifepo4 battery i had prviously used in a Toyota prius plug in hybrid conversion, which i run for 2 years.

I,ve now reconfigured the battery into a 48v 120Ah configuration ready to match up with an AC coupled inverter.

I`ve seen a reasonably priced SoFar Solar mass energy ME3000SP inverter from a few distributers here in the UK, and I was hoping that some members ere using them, and could share their opinions on them, good and bad, on the operation, reliabilty and support on them before I opt in to buying one of them.

Any information would be greatly appreciated.

I ahve already experimented with the same battery in a DC coupled system using a Solax X hybrid II inverter that worked very well to be honest, except for its innefficiencies, we were loosing too much energy in the charge / discharge process, meaning our generation meter was loosing out, hence loosing FIT.

With an AC copled system like the ME3000SP, the units generated are counted before any charge / discharge has taken place meaning no loss in FIT due to inneficiency, and still getting the energy diverted to the battery after the FIT count but before it escapes down the grid.

If youd like any info on the solax, please ask away.

glyndwr.
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#2
I've pondered that Solax, how many KWh are you losing a day ?
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#3
(09-08-2018, 11:13 PM)Sean Wrote: I've pondered that Solax, how many KWh are you losing a day ?

Hi Sean,

We tried it as an experiment to be honest, i picked up the inverter used, the previous owner had moved to a tesla powerwall.

OK, in my brothers house where we trialed it, he has 2 solar arrays, a 3kw array on his main roof, and a 3kw array on his garage roof.

Both systems have been installed for over 2 years so we had good data to look back at.

In general, the main roof array produces approx 10% more energy per day, and this has been very consistent.

So, we installed the solax x hybrid into the main roof pv and AC cables, set the inverter up to operate with our home made 48v lifepo4 battery, the inverter was very easy to set up.
Each pv inverter has its own generation meter.
We monitored daily the production through each generation meter, and over a 3 week period recorded the results.

Now, we found the main roof array was approx 20% behind the garage array, equating to a mean loss of approx 30% in real terms through the main roof generation meter.
Isolated the battery for a week to test the solax inverter efficiency as a standard pv inverter without any battery connected thus no charge / discharge cycles, and the main roof was back to its original approx 10% more than the garage roof.

so, in our basic conclusion, with the set up paramenters we had used, the solax was loosing 30% efficiency with batteries connected and operating all day.

Without another pv array on the house, or without any data to fall back on we wouldnt have been any wiser to the efficicency losses.

We now have to change plans and move to an AC coupled system, as then, we will still get the max output from the main roof pv array through the generation meter, so not loose any FIT, then use the AC coupled inverter to divert the energy into the battery that would have ordinarily been lost to the grid. Now, in this AC coupled solution, it doesnt really matter so much about efficiency as the energy would have been lost to the grid anyway.

The solax manual states a 7% loss in charge, plus 7% loss in discharge, but in reality we were seeing much greater losses than that, although through the night with lower power house consumption, apparantly this is a very heavy loss scenario practice for all inverters.

It is a well built inverter, quiet, easy to set up for any battery, good battery parameter options in the menu, i really like the inverter, but n our scenario, AC coupled is the only way to proceed.

Hope this helps,

glyndwr1998
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#4
(09-09-2018, 01:16 PM)glyndwr1998 Wrote:
(09-08-2018, 11:13 PM)Sean Wrote: I've pondered that Solax, how many KWh are you losing a day ?

Hi Sean,

We tried it as an experiment to be honest, i picked up the inverter used, the previous owner had moved to a tesla powerwall.

OK, in my brothers house where we trialed it, he has 2 solar arrays, a 3kw array on his main roof, and a 3kw array on his garage roof.

Both systems have been installed for over 2 years so we had good data to look back at.

In general, the main roof array produces approx 10% more energy per day, and this has been very consistent.

So, we installed the solax x hybrid into the main roof pv and AC cables, set the inverter up to operate with our home made 48v lifepo4 battery, the inverter was very easy to set up.
Each pv inverter has its own generation meter.
We monitored daily the production through each generation meter, and over a 3 week period recorded the results.

Now, we found the main roof array was approx 20% behind the garage array, equating to a mean loss of approx 30% in real terms through the main roof generation meter.
Isolated the battery for a week to test the solax inverter efficiency as a standard pv inverter without any battery connected thus no charge / discharge cycles, and the main roof was back to its original approx 10% more than the garage roof.

so, in our basic conclusion, with the set up paramenters we had used, the solax was loosing 30% efficiency with batteries connected and operating all day.

Without another pv array on the house, or without any data to fall back on we wouldnt have been any wiser to the efficicency losses.

We now have to change plans and move to an AC coupled system, as then, we will still get the max output from the main roof pv array through the generation meter, so not loose any FIT, then use the AC coupled inverter to divert the energy into the battery that would have ordinarily been lost to the grid. Now, in this AC coupled solution, it doesnt really matter so much about efficiency as the energy would have been lost to the grid anyway.

The solax manual states a 7% loss in charge, plus 7% loss in discharge, but in reality we were seeing much greater losses than that, although through the night with lower power house consumption, apparantly this is a very heavy loss scenario practice for all inverters.

It is a well built inverter, quiet, easy to set up for any battery, good battery parameter options in the menu, i really like the inverter, but n our scenario, AC coupled is the only way to proceed.

Hope this helps,

glyndwr1998
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#5
I got a SofarSolar ME3000SP inverter for our solar system, it is good.
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#6
We have ME3000sp fitted , presently having nothing but trouble with it . It completely switched off , company came out and added a new battery , worked for all of about 6hrs , then completely shut off again . Company who we purchased from are trying to tell me it’s in standby , I have explained until I’m blue in the face that it’s not in standby it’s completely off but they don’t seem to understand ! We have it set up to charge at night on our economy 7 , it’s not even doing that ! Help !!
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#7
(01-22-2019, 12:59 PM)Juliehelen101 Wrote: We have ME3000sp fitted , presently having nothing but trouble with it . It completely switched off , company came out and added a new battery , worked for all of about 6hrs , then completely shut off again . Company who we purchased from are trying to tell me it’s in standby , I have explained until I’m blue in the face that it’s not in standby it’s completely off but they don’t seem to understand ! We have it set up to charge at night on our economy 7 , it’s not even doing that ! Help !!

Hi

I don't have the ME300PE yet but I will be ordering it soon.

Is it displaying an event code?

Looking at the manual a switch off occurs when the battery voltage is low (ID86) or it's received a remote switch off command (ID84).

What type of batteries are you using? Are they the Pylon batteries, is the inverter parameters set to the correct battery type, is the depth of discharge and minimum battery voltage setting corect?
If not the battery could be over discharged and the bms is sending a shut down signal.

I'm guessing that this will have all been checked out already but might be worth confirming.

I don't have mine yet, this is just what I can glean from the manual.
UK Southwest.

6 kWp Solar Panels
APS YC500i Micro Inverters.
Still sourcing and processing cells for powerwall.
Planning on a Sofar Mass Energy ME3000SP AC coupled grid tied inverter.
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#8
Yes we do have pylon batteries. We have been reading the manual and researching and that’s our next step , to check all the parameters etc. We managed to reboot it so we can now at least get in to the menu to check everything . It’s a slow process as we are not electricians , so just trying to find our way around it .at 2.44am this morning , the batteries were almost fully charged ( from the grid , economy 7) but by 7am ,one was completely empty and the other almost . It didn’t appear that we had had the usage from them , according to our smart meter . The researching continues .
Thanks for your reply .
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