1000w backup inverter?

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outbackpaige
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My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

1000w backup inverter?

Post by outbackpaige » Fri May 08, 2020 9:02 am

What's the best inverter for a small backup system, 1000watts?
This would be for whjen me system is on the fritz and i need to directly connect to a few batteries.

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EA6LE-ONE
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Posts: 129
Joined: Tue May 05, 2020 7:51 am
My RE system: System 1:
MATE3s, 3 x Radian GS8048A,
4 x FLEXmax 100, HUB10,
2 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 4 x FLEXware ICS Plus,
54 x PANASONIC VBHN325SA17 325W

System 2:
MATE3s, 2 x VFX3648,
2 x FLEXmax 100, HUB10
1 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 2 x FLEXware ICS
21 x PANASONIC VBHN325SA17 325W
Location: Providenciales, Turks & Caicos Isl.

Re: 1000w backup inverter?

Post by EA6LE-ONE » Fri May 08, 2020 9:10 am

It depends on the load. Try to have it at least twice the size of continuous load you will need. Might need more depending on type of load. Check the peak power needed for the equipment you will power with it.

raysun
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My RE system: Flexpower One: FX3048T, (2) FM80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 6 strings of 2 in series)
Hyundai 355 watt panels (6 - 3 strings of 2 in series)
Honda EU7000is gas fuel generator

Re: 1000w backup inverter?

Post by raysun » Fri May 08, 2020 9:29 am

outbackpaige wrote:
Fri May 08, 2020 9:02 am
What's the best inverter for a small backup system, 1000watts?
This would be for whjen me system is on the fritz and i need to directly connect to a few batteries.
What does the current system consist of? Inverter rating? Battery voltage and capacity.

Would you be using the same charging infrastructure as now, or have stand-alone charging?

User avatar
EA6LE-ONE
Forum Guru
Posts: 129
Joined: Tue May 05, 2020 7:51 am
My RE system: System 1:
MATE3s, 3 x Radian GS8048A,
4 x FLEXmax 100, HUB10,
2 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 4 x FLEXware ICS Plus,
54 x PANASONIC VBHN325SA17 325W

System 2:
MATE3s, 2 x VFX3648,
2 x FLEXmax 100, HUB10
1 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 2 x FLEXware ICS
21 x PANASONIC VBHN325SA17 325W
Location: Providenciales, Turks & Caicos Isl.

Re: 1000w backup inverter?

Post by EA6LE-ONE » Fri May 08, 2020 9:35 am

raysun wrote:
Fri May 08, 2020 9:29 am


What does the current system consist of? Inverter rating? Battery voltage and capacity.

Would you be using the same charging infrastructure as now, or have stand-alone charging?

From the profile it looks like he has the charger only.

raysun
Forum Emperor
Posts: 2275
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, (2) FM80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 6 strings of 2 in series)
Hyundai 355 watt panels (6 - 3 strings of 2 in series)
Honda EU7000is gas fuel generator

Re: 1000w backup inverter?

Post by raysun » Fri May 08, 2020 9:51 am

EA6LE-ONE wrote:
Fri May 08, 2020 9:35 am
raysun wrote:
Fri May 08, 2020 9:29 am


What does the current system consist of? Inverter rating? Battery voltage and capacity.

Would you be using the same charging infrastructure as now, or have stand-alone charging?

From the profile it looks like he has the charger only.
I'm assuming the profile is incomplete, and possibly listing only Outback equipment.

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: 1000w backup inverter?

Post by outbackpaige » Fri May 08, 2020 10:00 am

Stand alone charging, 1 12 volt with steady 800watt load and 2 180 watt panels

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EA6LE-ONE
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Posts: 129
Joined: Tue May 05, 2020 7:51 am
My RE system: System 1:
MATE3s, 3 x Radian GS8048A,
4 x FLEXmax 100, HUB10,
2 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 4 x FLEXware ICS Plus,
54 x PANASONIC VBHN325SA17 325W

System 2:
MATE3s, 2 x VFX3648,
2 x FLEXmax 100, HUB10
1 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 2 x FLEXware ICS
21 x PANASONIC VBHN325SA17 325W
Location: Providenciales, Turks & Caicos Isl.

Re: 1000w backup inverter?

Post by EA6LE-ONE » Fri May 08, 2020 10:43 am

outbackpaige wrote:
Fri May 08, 2020 10:00 am
Stand alone charging, 1 12 volt with steady 800watt load and 2 180 watt panels
Probably a 1500w pure sine-wave inverter, maybe bump it to a 2000W. What battery you have?

raysun
Forum Emperor
Posts: 2275
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, (2) FM80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 6 strings of 2 in series)
Hyundai 355 watt panels (6 - 3 strings of 2 in series)
Honda EU7000is gas fuel generator

Re: 1000w backup inverter?

Post by raysun » Fri May 08, 2020 10:44 am

outbackpaige wrote:
Fri May 08, 2020 10:00 am
Stand alone charging, 1 12 volt with steady 800watt load and 2 180 watt panels
Hmmm.... Theres going to need to be two charging sources.

Assuming an 800W continuous load (which IME, is high for most situations but let's use it for planning.)

800W x 24H = 19.2kWH.

At 12V that's going to be 19.2kWH / 12V = 1600AH. If 50% battery draw is acceptable then 1600 x 2 = 3200AH battery. Assuming losses by inverter efficiency, draw from the battery is actually going to be higher.

360W PV array running the equivalent of full power for 5 hours = 1800WH or 1800 / 12 = 150AH. About 9% of total charging demand, maximum.

Reversing the calculations. If the two PV panels are producing roughly 1800WH per day (a high estimate IME), then charging losses and Inverter losses are going to take at least a 20% bite or 1800 x 0.8 = 1440WH net for load service. That's about the power consumption of a small refrigerator. Battery sizing would be roughly 300AH @ 12V. Continuous load service would be roughly 75W, so possibly a smaller Inverter- in the 250-500W range - would be a better match.

User avatar
EA6LE-ONE
Forum Guru
Posts: 129
Joined: Tue May 05, 2020 7:51 am
My RE system: System 1:
MATE3s, 3 x Radian GS8048A,
4 x FLEXmax 100, HUB10,
2 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 4 x FLEXware ICS Plus,
54 x PANASONIC VBHN325SA17 325W

System 2:
MATE3s, 2 x VFX3648,
2 x FLEXmax 100, HUB10
1 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 2 x FLEXware ICS
21 x PANASONIC VBHN325SA17 325W
Location: Providenciales, Turks & Caicos Isl.

Re: 1000w backup inverter?

Post by EA6LE-ONE » Fri May 08, 2020 10:52 am

raysun wrote:
Fri May 08, 2020 10:44 am
outbackpaige wrote:
Fri May 08, 2020 10:00 am
Stand alone charging, 1 12 volt with steady 800watt load and 2 180 watt panels
Hmmm.... Theres going to need to be two charging sources.

Assuming an 800W continuous load (which IME, is high for most situations be let's use it for planning.)

800W x 24H = 19.2kWH.

At 12V that's going to be 19.2kWH / 12V = 1600AH. If 50% battery draw is acceptable then 1600 x 2 = 3200AH battery. Assuming losses by inverter efficiency, draw from the battery is actually going to be higher.

360W PV array running the equivalent of full power for 5 hours = 1800WH or 1800 / 12 = 150AH. About 9% of total charging demand, maximum.

Reversing the calculations. If the two PV panels are producing roughly 1800WH per day (a high estimate IME), then charging losses and Inverter losses are going to take at least a 20% bite or 1800 x 0.8 = 1440WH net for load service. That's about the power consumption of a small refrigerator. Battery sizing would be roughly 300AH @ 12V. Continuous load service would be roughly 75W, so possibly a smaller Inverter- in the 250-500W range - would be a better match.
"What's the best inverter for a small backup system, 1000watts?
This would be for whjen me system is on the fritz and i need to directly connect to a few batteries."

He wants to use it as a backup (UPS) system. So is occasional. The question is from his experience how much time will need to supply daily/monthly?

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: 1000w backup inverter?

Post by outbackpaige » Fri May 08, 2020 11:00 am

LTH Solar Battery L-31t

Appreciate your help.

raysun
Forum Emperor
Posts: 2275
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, (2) FM80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 6 strings of 2 in series)
Hyundai 355 watt panels (6 - 3 strings of 2 in series)
Honda EU7000is gas fuel generator

Re: 1000w backup inverter?

Post by raysun » Fri May 08, 2020 11:00 am

EA6LE-ONE wrote:
Fri May 08, 2020 10:52 am
raysun wrote:
Fri May 08, 2020 10:44 am
outbackpaige wrote:
Fri May 08, 2020 10:00 am
Stand alone charging, 1 12 volt with steady 800watt load and 2 180 watt panels
Hmmm.... Theres going to need to be two charging sources.

Assuming an 800W continuous load (which IME, is high for most situations be let's use it for planning.)

800W x 24H = 19.2kWH.

At 12V that's going to be 19.2kWH / 12V = 1600AH. If 50% battery draw is acceptable then 1600 x 2 = 3200AH battery. Assuming losses by inverter efficiency, draw from the battery is actually going to be higher.

360W PV array running the equivalent of full power for 5 hours = 1800WH or 1800 / 12 = 150AH. About 9% of total charging demand, maximum.

Reversing the calculations. If the two PV panels are producing roughly 1800WH per day (a high estimate IME), then charging losses and Inverter losses are going to take at least a 20% bite or 1800 x 0.8 = 1440WH net for load service. That's about the power consumption of a small refrigerator. Battery sizing would be roughly 300AH @ 12V. Continuous load service would be roughly 75W, so possibly a smaller Inverter- in the 250-500W range - would be a better match.
"What's the best inverter for a small backup system, 1000watts?
This would be for whjen me system is on the fritz and i need to directly connect to a few batteries."

He wants to use it as a backup (UPS) system. So is occasional. The question is from his experience how much time will need to supply daily/monthly?
That is the $64,000 question certainly.

OP noted 800W continuous, which I interpret as meaning 800W - continuously. Likely too much demand, but that was the input.

User avatar
EA6LE-ONE
Forum Guru
Posts: 129
Joined: Tue May 05, 2020 7:51 am
My RE system: System 1:
MATE3s, 3 x Radian GS8048A,
4 x FLEXmax 100, HUB10,
2 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 4 x FLEXware ICS Plus,
54 x PANASONIC VBHN325SA17 325W

System 2:
MATE3s, 2 x VFX3648,
2 x FLEXmax 100, HUB10
1 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 2 x FLEXware ICS
21 x PANASONIC VBHN325SA17 325W
Location: Providenciales, Turks & Caicos Isl.

Re: 1000w backup inverter?

Post by EA6LE-ONE » Fri May 08, 2020 11:09 am

outbackpaige wrote:
Fri May 08, 2020 11:00 am
LTH Solar Battery L-31t

Appreciate your help.
That is a small battery for a 800W load. You may get about 30-40min and maybe 300 cycles or less from it.
For a load of 800W then the inverter should be 1500-2000W. Go for a good brand pure sine-wave.
the cheap chinese inverters tend to fail quickly.
For a more robust solution you should get 3 more batteries and a 48V inverter. 24V is good too. Are the solar panels 18V or 30V?

pss
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My RE system: 8330 watts in three strings, Flexmax 60 x 3, Radian 8048A, GSLC load center, Mate 3S, Hub 10.3, FN-DC and 900 Amp, 48V Trojan T105-RE battery bank.

Re: 1000w backup inverter?

Post by pss » Fri May 08, 2020 12:18 pm

If interested in 2000 watt Xantrex sinewave UPS and learning about it's use, send me a PM.

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