Multiplus 2 won't charge much over 1000W

DIY
,
1

Hello all

I have a 24V Fogstar Drift and a Multiplus II 24/3000/70.

When I’m connected to shore the charge going into the battery hovers around 1000W. I’ve changed settings that I think should improve that but to no avail.

If I put a 1800W load into the system the shore reading goes from 1000W to 2800W.

I really want to be able to top up my battery from shore power at somewhere close to 13A if at all possible.

Probably loads of info I should have provided so apologies.

Any advice appreciated.

TIA

Andrew

2

TAB: General
System frequency 50Hz
Shore current 16.0 A
Overruled by remote checked
Dynamic current limiter unchecked
External current sensor connected (see manual) unchecked
TAB: Grid
Country / grid code standard None: (feeding energy from DC to grid not allowed)
Accept wide input frequency range (45-65 Hz) unchecked
AC low switch mains off 180 V
AC low switch mains on 187 V
AC high switch mains on 265 V
AC high switch mains off 270 V
UPS function checked
TAB: Inverter
PowerAssist checked
Assist current boost factor 2.0
Inverter output voltage 230 V
Ground relay checked
Inverter DC shut-down voltage 18.60 V
Inverter DC restart voltage 21.80 V
Low DC alarm level 21.80 V
Do not restart after short-circuit (VDE 2510-2 safety) unchecked
enable AES unchecked
TAB: Charger
Enable charger checked
Weak AC input unchecked
Stop after excessive bulk unchecked
Lithium batteries checked
Disable VSense (for diagnostic purposes) unchecked
Configured for VE.Bus BMS unchecked
Charge curve Fixed
Absorption voltage 28.40 V
Float voltage 27.00 V
Charge current 30 A
Repeated absorption time 0.50 Hr
Repeated absorption interval 1.00 Days
Absorption time 1 Hr
TAB: Virtual switch
TAB: Usage
Invert virtual switch usage checked
Virtual switch usage drive multifunctional (aux.) relay: VS on=open; VS off=close
TAB: A: Set VS ON
“High power limit” VS on delay -1 seconds
“Low DC level” VS on delay -1 seconds
“High DC level” VS on delay -1 seconds
“Not charging” VS on delay -1 seconds
“Fan on” VS on delay -1 seconds
set VS on when bulk protection is activated unchecked
set VS on when general system failure occurs unchecked
“Temperature pre-alarm” VS on delay 1 seconds
“Low-battery pre-alarm” VS on delay 1 seconds
“Overload pre-alarm” VS on delay 1 seconds
“Udc ripple pre-alarm” VS on delay 1 seconds
TAB: B: Set VS OFF
“Low power limit” VS off delay -1 seconds
“Low DC level” VS off delay -1 seconds
“High DC level” VS off delay -1 seconds
“Charging” VS off delay -1 seconds
“Fan off” VS off delay -1 seconds
“Bulk finished” VS off delay -1 minutes
“No VS on” VS off delay 0 minutes
“No AC input” VS off delay -1 seconds
“Temperature pre-alarm” VS off delay -1 seconds
“Low-battery pre-alarm” VS off delay -1 seconds
“Overload pre-alarm” VS off delay -1 seconds
“Udc ripple pre-alarm” VS off delay -1 seconds
TAB: VS options
Minimum VS on time 0 minutes
Change inverter period time when virtual switch is on unchecked
Change inverter period time on Udc unchecked
TAB: Advanced
limit internal charger to prioritize other energy sources unchecked

3

You limited the charge current.

28V x 30A is 840W, so what else do you expect the MP to do?

4

Thank you for your reply. That has sorted it and I am now charging at 2168W.

I think that was set previously when I was trying to charge from a low quality generator and I’d missed it and was focusing on the AC 16A settings.

Your assistance is appreciated. The sarcasm less so, but I’m grateful.

Cheers.

5

Noted, it was too tempting, sorry about that

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6

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