Max power output from Generator

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MikeyTeach
Forum Whiz
Posts: 25
Joined: Tue Nov 24, 2009 11:38 am
My RE system: System 1: House:
8 x Schutten STP6-230Watt Panels
1 x Outback VFX3024E
1 x FM80
1 x Mate
12 x 2v BAE 1200´s (800AH) Batteries
1 x Pramac Yanmar Generator S6500

System 2: Garden:
4 x Schutten STP6 230Watt Panels
1 x XANTREX Trace SW2612E Inverter
1 x MX60
6 x 2v Rolls Series 4000 S-1725 Batteries

Max power output from Generator

Post by MikeyTeach »

Hi,
I have a VFX 3024E and I am thinking of changing my 5kw generator for a bigger more powerful generator (15kw).Is there a maximum power of generator I can connect to my system for battery charging or heavy AC loads etc?

Thanks

Mike
provo
Forum Czar
Posts: 589
Joined: Thu Jul 27, 2006 4:34 pm
My RE system: Sixteen Evergreen EC-120
(4 strings, total 1920W)
Eight Rolls S-550 (2 strings, total ~800Ah @ 24V)
One FM80
One VFXR3524A
Hub 10
Mate3s
FNDC and Trimetric
Honda EU3000is generator
Location: Sierra foothills

Re: Max power output from Generator

Post by provo »

MikeyTeach wrote: Tue Nov 03, 2020 10:56 am
Is there a maximum power of generator I can connect to my system for battery charging or heavy AC loads etc?
You have a 24V system in the house and a 12V system in the garden, right?
1. Is the generator used for battery charging in both systems?
2. At the same time?
MikeyTeach
Forum Whiz
Posts: 25
Joined: Tue Nov 24, 2009 11:38 am
My RE system: System 1: House:
8 x Schutten STP6-230Watt Panels
1 x Outback VFX3024E
1 x FM80
1 x Mate
12 x 2v BAE 1200´s (800AH) Batteries
1 x Pramac Yanmar Generator S6500

System 2: Garden:
4 x Schutten STP6 230Watt Panels
1 x XANTREX Trace SW2612E Inverter
1 x MX60
6 x 2v Rolls Series 4000 S-1725 Batteries

Re: Max power output from Generator

Post by MikeyTeach »

Hi,
Yes, I plan to charge both systems at the same time.
Plus run extra loads in the house, like dish washer, also at the same time as charging.

Cheers

Mike
provo
Forum Czar
Posts: 589
Joined: Thu Jul 27, 2006 4:34 pm
My RE system: Sixteen Evergreen EC-120
(4 strings, total 1920W)
Eight Rolls S-550 (2 strings, total ~800Ah @ 24V)
One FM80
One VFXR3524A
Hub 10
Mate3s
FNDC and Trimetric
Honda EU3000is generator
Location: Sierra foothills

Re: Max power output from Generator

Post by provo »

Each inverter will have limits which you can find in the specs. Here are a few that seem most relevant to your question:

Max. Continuous AC Output Current
Max. AC Input Current
Max. Battery Charging -- AC amps, DC amps, and Power in volt-amps.

When passing AC from the generator through the inverter/charger to run loads and charge batteries, those values must not be exceeded. However, the output capability of the generator is irrelevant. A 15kW generator can be fired up to run a single 9W LED light bulb -- efficiency will suffer, of course.

In the case of battery charging, obviously the battery specs need to be met also -- optimum and max. charging current, plus other settings.

Others here could flesh in the details better than I. My gennie is 3kW @120V -- 15kW at 230VAC is out of my league :grin: .
MikeyTeach
Forum Whiz
Posts: 25
Joined: Tue Nov 24, 2009 11:38 am
My RE system: System 1: House:
8 x Schutten STP6-230Watt Panels
1 x Outback VFX3024E
1 x FM80
1 x Mate
12 x 2v BAE 1200´s (800AH) Batteries
1 x Pramac Yanmar Generator S6500

System 2: Garden:
4 x Schutten STP6 230Watt Panels
1 x XANTREX Trace SW2612E Inverter
1 x MX60
6 x 2v Rolls Series 4000 S-1725 Batteries

Re: Max power output from Generator

Post by MikeyTeach »

Thank you Provo
SandyP
Forum Guru
Posts: 433
Joined: Tue Jun 21, 2011 4:44 am
My RE system: 8 x 190W 24V Suntech panels (4 strings of 2) July 2011
4 x 325W 24V Suntech panels (2 strings of 2) added Sept2018
Mate2
Outback FM60 MPPT (max output lowered to 55amps)
12 x 2V Hoppecke GEL 612 Ah C24 - 24V System
Outback VFX3024 Inverter/Charger
Victron BMV-602s
Honda 5.5kW Genset
Location: Victoria, Australia

Re: Max power output from Generator

Post by SandyP »

MikeyTeach wrote: Tue Nov 03, 2020 10:56 am Hi,
I have a VFX 3024E and I am thinking of changing my 5kw generator for a bigger more powerful generator (15kw).Is there a maximum power of generator I can connect to my system for battery charging or heavy AC loads etc?

Thanks

Mike
30 amps AC IN is the maximum for the FX & VFX Export models.
provo
Forum Czar
Posts: 589
Joined: Thu Jul 27, 2006 4:34 pm
My RE system: Sixteen Evergreen EC-120
(4 strings, total 1920W)
Eight Rolls S-550 (2 strings, total ~800Ah @ 24V)
One FM80
One VFXR3524A
Hub 10
Mate3s
FNDC and Trimetric
Honda EU3000is generator
Location: Sierra foothills

Re: Max power output from Generator

Post by provo »

SandyP wrote: Wed Nov 04, 2020 5:24 am
30 amps AC IN is the maximum for the FX & VFX Export models.
I know nothing about Trace inverters, but if the Trace is in the same ballpark, 60A x 230VAC = 13.8kW, so a 15kW might be right, if you could really make use of that much.
Pictonrose
Forum Member
Posts: 16
Joined: Tue Aug 27, 2019 6:26 pm
My RE system: Outback flex max 80
Xantrex sine wave plus inverter/ charger model # swplus5548
24 panel - (12 on the roof, 12 on an A frame) 2 different brands
Magnum 5 kw generator
Location: Northern Ontario

Re: Max power output from Generator

Post by Pictonrose »

I upgraded my generator to a 5kw magnum last winter. I spoke to my solar guy who said I shouldn't change any parameters in my outback or inverter. I have a 48v system. We have been struggling for months with low power in the morning. We checked the battery bank when it first started, everything seemed fine. We are planning on shutting down the breakers to the panel to see if that helps overnight. On another note, when we charge with genie, the out power always reads 50.0 when it was charged to 58.2 or higher, why does it do that?
fcwlp
Forum Czar
Posts: 648
Joined: Wed Jan 22, 2020 9:40 am
My RE system: GS8048A, FM80 w/3,600W PV Fixed, FM80 w/2,700W on Zomeworks tracker, Mate3, 24 Trojan 2V L16 1100AH @ C20, Grid-Tied with Kohler 14RESA LPG Generator and MEP-803 Diesel if needed.

I install and maintain grid-tied and off-grid systems in my area and consult on solar system design/operation.
Location: 80 miles NE of Phoenix at 5500'

Re: Max power output from Generator

Post by fcwlp »

Post some more details of your system in your profile, especially details on batteries including age, location and solar panels. I am not familiar with the Magnum 5kW generator, please provide a link to the specs.

Your Xantrex SW Plus 5548 and Outback FM80 is similar to a system I inherited. When you say power reads 50.0 vs 58.8, I assume you are referring to the Xantrex menu item 4a or 4b for battery voltage (4a is actual, 4b is temp compensated).

If you are not getting above 50.0V with the generator now, was the generator able to charge the batteries correctly in the past? If it worked in the past, the wiring is likely correct. The SW Plus 5548 is a single phase system. Some details on how the Magnum 5kW is wired into the system would be useful. Pictures can help. You should verify that you have generator voltage at the 5548. Maybe a breaker is tripped. You can also verify by observing the AC1 or AC2 LEDs and make sure that it is solid green.

On a sunny day, can the FM80 get the batteries up to the absorb voltage? If, not there is a good probability your batteries are in need of replacement.
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