EasySolar 11 GX 5000 48v, ? how to stabilize my Lithium Titanium LTO batteries

Q&A and troubleshooting
1

Hi Does anyone know the settings or (Do I need an external Victron BMS 48v) for my Victron Inverter EasySolar 11 GX 5000 48v to stabilize my Lithium Titanium LTO batteries 48v 120Ah (has own internal BMS) from overcharging, I realize it’s software related my setup planning is Shore power-in to-Isolation Transformer- to inverter also in Solar 4x 415W panels
(4 x 24V-panels @ 2S2P-2S2P(48+48) = 1.7Kw average daily, flat on bus roof = 179v)not sure on my math’s with these
would appreciate some advice thanks PhilDoz (Aussie/Kiwi)

2

You need to find the recommended charging information for the battery that you have obtained from the supplier/ manufacturer. You can then set these voltage and current parameters into the EasySolar GX. We can not provide the charging parameters for an unknown non Victron battery.

You can not add an external Victron BMS, these only work with Victron’s own LiFePO4 batteries. The internet BMS ought to provide safety shut down. If it has CAN or other wired communication then it may be possible to connect it to the GX device to control charging.

3

I’ve been counselled by a Caravan solar electrician/builder to connect the panels direct connection, soldered with no other switch between the panels and the solar MPPT controller and have the fuse after the inverter and before the batteries, what do you think ?

4

Thanks, because only recently could I adjust the current parameters into the EasySolar 11 5000W GX software, also I was informed to get rid of the EMS the 3 Pole Change over Switch (that seperates the Sure power from the Inverter) and to make direct connection to the Solar controller ( which is inside the EasySolar 11 ) from the panels without a isolation switch and to have the fuses 2 for sure power ( @ entre )and 1 two pole before the LTO batteries 48v which has it’s own BMS can you please run your eye over this and if you have any suggestion would appreciate it a lot. thanks Phil

5

Not safe. There should always be a disconnect between panels and mppt. And why soldered? mc4 connections wre literally the gold standard.

6

Define overcharging? Over amping or over voltage?

If you have chosen a total cell number that is within range of the inverter charger voltage range for both high and low battery, there shouldn’t be too much of an issue.

Voltage and amps (and to some degree charge stages) are easy and both are programmable according to the bms set up. (They use CC and CV for charging not unlike lifepo4.)

7

Thanks, I knew something wasn’t right, as this is the standard procedure with most setups.

8

thank thought it wasn’t right