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On the GTIL topic - can 2 positive and 2 negative inputs be applied to each inverter terminal? I am thinking PV 75v max and battery 53v max as they both fall within the GTIL's voltage parameters or does it have to go through a Solar Charge Controller and battery first as per my current setup...

Hi there. A little late to the party sorry. Would this situation also arise due to an over voltage situation with one cell exceeding the BMS limit OVP?

Well that video says it all THANK YOU - wonderful explanation/test

Sorry to be a pain - I read that the time to charge a battery was H = AH/A My battery is 150 AH - so at 15A the battery should charge in 10 hours - at 10A the battery should charge in 15 hours. So by reducing the voltage to increase the amperage should theoretically shorten the charge time? Am...

Thanks for the answer - Oh dear I am losing it again!!?? My thought process was that 2000 watts coming off the roof at a lower voltage = more amps therefore quicker time to achieve CC. I am obviously seeing this all wrong. It does seem to increase the amps from the MPPT to the battery but there...

I am currently charging my LifePo4 (16s) 48v battery using MPPT with 56V CC/CV After reading this thread and realising how little there is to be gained above 55V - I am considering dropping to 55V. Would this increase the amperage into the battery also and would that not speed up the charging...

I have been running 48v 16s 150ah lifepo4 for several months conservatively with charge controller to battery then to grid tie inverter. I have a bms and active balancer.The weather has been awful so I decided use the low power input to try trickling the battery higher to allow some top end...

The use of PB was advised because I have grid tie inverter 24/24 so when in float power goes direct to inverter not via batteries with input/output losses (or so I was told)

This may not help but in the lithium setting the float voltage gets overridden and shows the same as CC/CV but I believe the CF is just not used. The manual is badly worded. The advice I got was to input the settings and leave on PB. The amps cannot be set in the parameters it will just try to...

But that is the opposite of whats posted in Wills video? MPPTs don't compete on a single battery bank? Admittedly that was for separate inputs

Hi there. Probably a question for the man himself. Forgive me if this is a repeated enquiry but I struggle to find the answers/reasoning. I have a Makeskyblue 60 A V119 controller that works well. I have 2KW solar feeding LIFEPO4 and would like to add another 1KW I have watched Wills video...

Thanks for the heads up about the bank cutting off until the reconnection voltage is reached I honestly thought it was the single cell. After reading your post about taking the cells down to 2.0v or 2.2v or 2.5v - I would not consider my 3.09v LVD to be a DEPLETE issue? Any cells that drop...

I don't know if this will help but I have a cell that rises faster than the others when the bank is getting very near full capacity (full in my view). I was unsure if the 3.75v quoted for the BMS over voltage was the bank voltage or the cell voltage and also whether the whole bank would be...

Thank you for your help - and yes I do over complicate things! Kind regards peter

Well it sort of brings me back around to wehere I started I think? If I go with 3.4v for safety then thats 54.4v which is generally considered float voltage. Going back to the initial post it sounds like 54.4v charge and and 54.4v float may be suitable? Sorry - I don't know about frying my...

Interesting - same idea and very close to the voltage of the Lion suggestion (I read somewhere?) I was worried about the float being too high compared to the generally accepted 54.4v (3.4v) but they say 3.475v and you use 3.5v. Thinking I may give 55.6v charge and float a try and keep a watchful...

Thank you for the help - the chart is the 'loaded' chart for LIFEPO4. Can I ask how much of a load this refers to? My system runs 24/7 and always has some power being inputted or extracted - that is until LVD on the inverter switches everything back to grid. There is always an approx 200w draw...

So from memory - the recommendations I have seen / heard linked to Will's videos / information I have: 55.6v (this may have been from elswhere? 55.6v charge and 55.6 float - Lion?) 56.4v (Victron/Prowse) 58.0v (Battleborn/Prowse/Relion) I have a passive BMS that balances above 56v - my...

Yes I understand the logic behind a more fully charged battery providing more power but to charge the battery and then discharge the battery can result in large conversion losses. My thoughts were that if the battery hits float sooner these losses would be negated by bypassing the battery and...

This may be a silly question. I have a hybrid solar / charge controller / grid tie / 48v LIFEPO4 battery system. I have used various charge parameters - currently sticking with 55.6v charging and 54.4v float. I read that when the charging is in float mode the inverter takes the power directly...

Facebook: SunG Grid Tie Inverter with Limiter - very very helpful. The GTIL models have a good track record and the guy who runs the FBpage was involved with design and manufacturer. I have a small 2kw system which has knocked a third off my bill. Added batteries this year and knocked bill down...

I do not think that is an answer to my question ?? :D

Hi there, I was wondering how to wire a 16 piece LIFEPO4 48v 150ah battery bank with a monitor (or 2). I understand the principle but would like to use two 8s monitors (struggling to find a reasonable 16s). I have seen that other people have done this but there is no instruction available. Any...