question

iammotorhomeless avatar image
iammotorhomeless asked

Multiplus II 48/5000 (240v) in Parallel and I am getting "High DC Ripple: Warning"

Hi
I have a pair of Multiplus II 48/5000 (240V) in Parallel and I keep getting a "High DC Ripple: Warning"

well I say 'keep gettting' it's happend twice, once when a high load switched off (kettle)
but also once when we were just ticking over at 300w

before some helpfull person says read the "Wiring Unlimited book".
I have, thanks !
the battery cables are short and a good size, and we did our best to make them all the same lengths

AND my question is:
what is the best way to monitor the system.

I don't know if it is relevant, but the slave seems to be louder than the master, (as if it's working harder) is there a way to monitor the out put of each unit separately ??

and/or is there a way to tell witch one is tripping the warning (master or slave)

Cheers


multiplus in parallelshutdownwarnings
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
nickdb avatar image
nickdb answered ·

Get a clamp meter and measure the draw under various loads.

Are the inverters similar ages?

Ripple isn't usually a mystery:

Iffy wiring/connections, undersized cabling or batteries incapable of responding to load/surges.

With parallel systems short/low resistance cabling isn't a good thing, it can cause problems and is discussed in the guide for 3phase/parallel systems. It can contribute to imbalances.

One of the reasons parallel systems are an advanced config.

https://www.victronenergy.com/live/_media/ve.bus:4._ripple_in_a_ac_battery_system.pdf

2 comments
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

iammotorhomeless avatar image iammotorhomeless commented ·

the master is HQ2246 and the slave is HQ2241 so only 5 weeks between them

and sorry I used the word 'short' they are not short. they are about 1.5m to the Lynx and about 2m to the battery,

and thanks for the link... I had not seen that... but it is the same as in the "Wiring Unlimited book" :)

Is it possible to monitor both units at the same time with VEConfigure ??

0 Likes 0 ·
Show more comments