Search found 7 matches

by simat
Mon, 14 May 2018, 12:55
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 2210
Views: 224095

Re: PIP-4048MS inverter

Does anyone have any experience or thoughts on how well the PIP4048 handles the battery being disconnected from it with the solar panels still connected and generating power? In theory, if the SCC has been well designed it should not be a problem but... The reason for my question is that I will be u...
by simat
Fri, 11 May 2018, 09:49
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 2210
Views: 224095

Re: PIP-4048MS inverter

If you want to make a cheap accurate SOC meter and have some electronic skills you can use the TI ADS1115 16 bit Analog to Digital converter. Here is the circuit for a simple battery monitor using this chip https://github.com/simat/BatteryMonitor/blob/master/BMSsingle.jpg?raw=true There is a daughte...
by simat
Sat, 05 May 2018, 19:02
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 2210
Views: 224095

Re: PIP-4048MS inverter

Hi Simon, it is considered to be in absorb stage when it is within 0.5 volts of the absorb voltage setting. You can read more details of the absorb to float conditions here: http://forums.aeva.asn.au/viewtopic.php?f=31&t=4332&p=64095#p64095 Scroll down to the green heading "Charge Termination Condi...
by simat
Wed, 18 Apr 2018, 13:12
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 2210
Views: 224095

Re: PIP-4048MS inverter

But it's hard to tell what's going on without seeing the currents as reported by the PIP in the QPIGS command, and preferably also the charge stage in the undocumented Q1 command , field QQ (to tell when it really went to float). How hard would it be to provide that data? I have now added logging o...
by simat
Mon, 09 Apr 2018, 19:41
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 2210
Views: 224095

Re: PIP-4048MS inverter

I note that the currents have a resolution of 0.1 A, so these must be your BMS currents. Are the voltages from the BMS or from the QPIGS command of the PIP? The current is detected by current sense resistors on the Chinese BMS board. These boards use the TI BQ76940 chip to do the cell voltage and c...
by simat
Sun, 08 Apr 2018, 23:17
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 2210
Views: 224095

Re: PIP-4048MS inverter

About a week ago I got a 2p15s LFP battery connected up to a new PIP4048MS using this BMS as a frontend to my BMS software running on a Raspberry Pi. I am not using the battery disconnect function of the BMS until I have upgraded the MOSFETs to higher spec ones. The first day I tried to charge the b...
by simat
Thu, 15 Feb 2018, 22:19
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 2210
Views: 224095

Re: PIP-4048MS inverter

Hi, I am really impressed by the amount of excellent information in this thread and especially at all the work done by Coulomb and Weber. This is forums at their best! Thank you! I have been asked by a friend of a friend who I designed and installed an LFP based off grid system for in 2013 if I woul...