Recent content by gdpetti

Have the Growatt in my campervan and don't hear the noise much until the fans kick on with the inverter on.... kicks on high when I'm running the microwave, a drill etc at higher amperage.... kicks off when done, so I really don't notice it... especially with just the monitor/speakers on with...

I can't remember exactly what Ian said about it, but you're probably right on the 'non-smart' BMS that I had, as the 'smart' ones can be programmed better around the needs of the GW. I just know he was right.... first, as a newbie, I had the basic issues, but my 'non-smart' non-programmable BMS...

Yes, I have repeatedly check the individual cells... one of mine charges up faster than the other 7... not really a problem if I set the charge lower... currently have it set at 27.5, so the GW always shuts off about .1 above that, as the reading goes up and down some while charging, which could...

Yeah, I think most everyone does the 'user defined' setting. I'm in a campervan with excess panels and battery for my needs, so only problem I had was the BMS as Ian mentions over and over... seems most of them give the GW a problem... so I don't use one any more... haven't needed the alt to...

Ion at GW explained to me that the BMS's we use is the biggest problem.... I finally agreed after frying mine.... the GW doesn't seem to need it... I have them inside the vacampervan setup)... same batteries in self build.... all new to me.... GW worked fine without the BMS... I have one cell...

No, don't trust the ISDT much, especially after I put multiple extensions on it... which really didn't change much, but I have another meter to check the loads and general battery charge etc... but I mostly trust the multimeter for battery cell charge; that said, they are all consistent in their...

Was that qoute a question? M problem was the BMS... shorted out a terminal connection on the first one, installed the wrong BMS the second time... didnt notice that short until I put it back on after returning the second BMS... in the end, I'm not using a BMS.... since I have plenty of solar for...

My Growatt had a similar issue, ended up being the BMS. When I disconnected the BMS, the fluctuations went away. One of the leads going into the BMS was shorted out... another BMS was the wrong type... no problem once I top balanced and took the BMS off. That shorted out lead was the connection...

Yes, I've read that lithiums don't need or even want to 'float'... I do know that the other little lithium batteries in home appliances, like shavers etc, are usually used till near zero.. and then recharged to 100%. So, after playing around with it.. due to my screwing the BMS up initially...

Did you ask Ian about this? When I asked, that setting for USER2 does link Prog 19 and 20... I setup my system for double my current usage, so I really don't need it to charge up everyday unless a storm system is overhead for a few days. I find that during charging, the reading on the GW is...

Ok, 18650 is Li-Ion? Doesn't it say LiFePO4 in that ad on Amazon? ... didn't arrive with any temp probe either... not a separate one, unless it uses the cell wires for analysis? That ad says: DALY BMS 8S 24V 200A LiFePO4 Battery Protection Module PCB Protection Board with Balance Leads Wires...

Daly BMS 8s 24v 2iFePO4 Common Port with Cooling Fan This isn't a "Smart" type Overcharge is 3.75 and over discharge is 2.2 Amazon.com: DALY BMS 8S 24V 200A LiFePO4 Battery Protection Module PCB Protection Board with Balance Leads Wires Temp Sensor Common Port BMS for 18650 Battery Pack 24V...

Tried running the wire to the GW thru the meter shunt.... doesn't seem to be a problem... just ~.1v loss. This was just after 5pm with the solar panels in the shade about 80v, 0amps, 36 watts. Meter Shunt-- 26.68v Growatt--------26.76v Battery---------26.70v Turned inverter on a little later...

GW without BMS charging fine, at 27.1v on GW monitor, 26.68 on battery ISDT meter. One thing when testing the BMS that I didn't think of is that I have a different battery meter's shunt between the out wire for the BMS to the GW. Could this be the problem? I think I'll test it later if the...

Well, after cleaning, that cell doesn't "run" anymore... it's normal, and the same with the last #8 cell, only off ~.01v so not a problem, right? as it doesn't "run" either... all stable off the Daly BMS. So, I reattached the BMS this morning and back to the same problem of the fluctuating batt...