SheldonB

Hi Sidewinder thanks for the input, ive asked the electrician to double check whether the Aux port is set as Gen input (I believe it mustve been as he said he'd fix it), i have no idea how the inverter knows batt temp im assuming its a default value? I have asked Electrician is he installed a temp sensor and if not if he can add. We do check the batteries all the time and top up as required! the last set lasted 12 years believe it or not they where also 2 volt batteries (Willards). With regards to the wire gauge all wires are the same gauge (Picture angle makes the gauge look smaller). for the past 3 days the system has been working well and the batteries Voltage and SOC % seems to line up with the chart on the website that Kalahari Meerkat sent (Thanks again). Unfortunately the inverter is in the same room (No other option), the room is well ventilated and although not ideal its all we have to work with. Thanks for the input guys has been really helpful ,

Sorry another question the house is completely off grid as i mentioned earlier, and my mother does not have a generator so why does the one screen indicate that Generator use has been 12.7 hours?

Thanks Kalahari Meerkat for the feedback, really appreciate it. Too be honest batteries could be flooded cells ?? We fill them with battery water, so im assuming they would then be flooded cells? The number on the batteries is ST MIL25 FG, (They are 2 Volt 900ah apparently)and they are 2 years old. The previous installer that we got them from unfortunately passed away so i cant ask him, ive searched everywhere on the net and can't find any details on this battery. Thank you for that link you sent much appreciated and of great help. If i assume they are indeed normal flooded cells then fully charged as you say should be 2.11Vx 24 = 50.64Volts, ive attached a picture from earlier today where at 99% SOC its sitting at 50.79V, which is close to the 50.64V according to that website you sent , further more earlier this morning at 74%SOC it was sitting at 49.73V, once again pretty close to what the website sais (2.05Vx 24 = 49.2V for 70% charge). I called someone at First National battery and hopefully they can provide the specs of the batteries or point me in the right direction as too who made them? Will update spec sheet if i manage to get it. Just want to ensure the charging voltage etc and maximum discharge voltage (Low Battery Cutoff ) etc is setup correctly on the inverter.

Hi All Hoping someone can assist, at my mothers house, which is off grid (No Eskom power allowed) had to install a new inverter as the old one burnt out (Gecko in inverter fan caused it to burn out). The electrician installed a new Sunsynk 5kw hybrid inverter a few days ago. With the new inverter she installed 8 x 535 (Haitai HTM 535 ~ 555 M115 - 72 Panel) solar panels as her old panels where out of spec for the new inverter apparently. She is using the same AGM battery bank that was originally in place, however the electrician had to change the wiring so that the batteries where 48V. She has 24 x 2 volt 900ah batteries in place in series i believe giving 48 Volts. What should the charge/discharge settings be on the Sunsynk inverter to ensure full charge is achieved , what other settings can i check to ensure the system is operating optimally? Reason i ask is that the system was re-commissioned 3 days ago and each night she runs out of power? The settings are most probably correct and i have nothing bad to say about the electrician however for peace of mind id thought i would ask on the forum to ensure all is ok with her setup as she cant afford to replace batteries at this stage so want to ensure all settings are correct and cause no damage and are working optimally. Ive attached some readings off the inverter from yesterday 5pm. as well as pic of the battery bank. Any help will be greatly appreciated.

Items and Age: Solar MD 3.7kwh Lithium Battery Wall mounted Solar MD Smart Logger with Wifi Paid R31800 excl vat for both Price: R20 000 Payment Method Accepted: EFT prior to shipping Warranty: Remainder of warranty if applicable Packaging: Can package in a box Age: Just over 2yrs old , Purchased new Dec 2019 Condition: Very good Location: Tokai, Western Cape Reason: Getting a bigger battery Shipping: Can arrange with Courier Guy but for buyers account Collection: Yes preferred Currently connected to a Victron Multiplus 11 5Kw inverter , working 100%.

Thanks for the responses guys.

Hi Everyone My Mom has a 3.7kw MD Solar lithium battery installed and we would like to add more battery capacity. My question is the following can we add any other battery ie Pylontech or would we need to stick to another MD solar battery? On a side note there is nothing wrong with the current MD solar battery i just want to know if we have the option should we find better pricing with another battery manufactorer?? Thanks in advance for the replies. (Her system is a Victron Multiplus 2 5kw, with 12x 405w Canadian solar panels, Venus GX and Victron 250/100 MPPT, Solar MD Smart logger, Venus GX)

thanks IIznh have thought of that , good suggestion.

PSYWulf i hear you!

Greenfields majority of power is consumed at at night with underfloor heating etc, also battery does not make the night especially with loadshedding. LOL i'll tell her to start baking. Will look at another battery when funds allow, any reviews on the Solar MD batteries??

As a mater of interest how are the Solar MD batteries, ive checked the site and the web and have not found many reviews? Should i go for the same battery of can or would i be able to add a pylontech as an example to the existing Solar MD battery?

Thanks for the feedback guys much appreciated. See below on the 29th May peak solar W was 3869W, so if i take the panels size 405w x 12 x 75% (Line loss etc etc)= 3645W Peak production? So i would assume they are performing as they should?

Scorp, Greenfields thanks for the feedback will ask het to conduct the test.

Hi NigelL thanks for the feedback, sorry i am a bit of a noob when it comes to solar. So does this mean the battery itself is limiting production? If so should we look at replacing the battery with another make / model etc? If so firstly dammit, secondly what would you suggest and why?

Thanks for the response, i checked for yesterday her between 8am in the morning till 4pm , her consumption was 15KWh, Production was 12KWh. 0.1KWh to Grid and 3.8KWh from Grid. Also just remembered COCT installed a compulsory prepaid meter in a number of months ago, she used to have the old wheel type meter if i remember correctly, the new meter i dont believe allows feedback to the grid could this be the reason why the overall KWh produced is so much less than prior? Lastly does COCT have meters that allow feedback to the grid? If so how does one go about getting one and what do they pay back if feeding back?