LV 6548, split phase? Thoughts? Used cost?

ericfx1984 · Mar 21, 2024

I found a guy who's selling four used MPP solar LV 6548s

Trying to figure out if it's worth getting them from him or not?

I know I would have 12,000 watts to work with and a pair of MPPTs. Are there any problems with putting these units together and running in split phase?

I assume I would still be able to have 120 volt loads as well as 240 volt loads right?

And I think overall the power consumption at idle, between the two units would be somewhere in the ballpark of 140 Watts?

sunshine_eggo · Mar 21, 2024

Two 120V units can be run in parallel to provide 120/240V split phase.

The only thing I don't like about those units is their kinda crappy MPPT.

They claim 4kW, but the 250Voc limit and 18A PV input current limit mean your Vmp is going to be around 180V max, so 180 * 18A = 3240W - nowhere near 4kW.

BUT... you'd have 4 MPPT between the two units.

ericfx1984 · Mar 21, 2024

sunshine_eggo said:
Two 120V units can be run in parallel to provide 120/240V split phase.

The only thing I don't like about those units is their kinda crappy MPPT.

They claim 4kW, but the 250Voc limit and 18A PV input current limit mean your Vmp is going to be around 180V max, so 180 * 18A = 3240W - nowhere near 4kW.

BUT... you'd have 4 MPPT between the two units.

Ok so each unit is 60a MPPT x2?

What would you consider a fair price for a pair of used units?

Texican · Mar 21, 2024

ericfx1984 said:
Ok so each unit is 60a MPPT x2?

What would you consider a fair price for a pair of used units?

I have been using 2 of these inverters for 2 years now, no problems
Watts247 is selling them new for $1099 each, if you can use the 30 percent tax credit that makes it around $800 each for a new one. Can not use the tax credit on a used one
If you can use the tax credit, I would not pay over maybe $500-550 for a used one vs $800 for new

ericfx1984 · Mar 21, 2024

Texican said:
I have been using 2 of these inverters for 2 years now, no problems
Watts247 is selling them new for $1099 each, if you can use the 30 percent tax credit that makes it around $800 each for a new one. Can not use the tax credit on a used one
If you can use the tax credit, I would not pay over maybe $500-550 for a used one vs $800 for new

He's asking 600 a piece for them but I might see if I can hit him at 450 or 500

Supervstech · Mar 21, 2024

Some of them were problematic, and they were known to feed ac voltage on the pv circuit when connected to shore power.

I never had any issues with the ones i installed for my customers.

4 would get you 24kW output...

ericfx1984 · Mar 21, 2024

Supervstech said:
Some of them were problematic, and they were known to feed ac voltage on the pv circuit when connected to shore power.

I never had any issues with the ones i installed for my customers.

4 would get you 24kW output...

Yeah I'm only going to buy two of them if I do... 6K would have almost ran the house... 12k would run the house just fine

Lights, refrigerator (inverter based) television and a 45 watt per channel stereo, microwave... The motor in the washing machine... A few mini splits... Probably four or five 12,000 BTUs ...

But if I did it by four of them I could have two in use, and the other two hooked up and ready to roll but shut down

And if I can get him to go $2,000 or less for all four that might be the hot ticket

Supervstech · Mar 21, 2024

ericfx1984 said:
Yeah I'm only going to buy two of them if I do... 6K would have almost ran the house... 12k would run the house just fine

Lights, refrigerator (inverter based) television and a 45 watt per channel stereo, microwave... The motor in the washing machine... A few mini splits... Probably four or five 12,000 BTUs ...

But if I did it by four of them I could have two in use, and the other two hooked up and ready to roll but shut down

And if I can get him to go $2,000 or less for all four that might be the hot ticket

Yeah, i paid 2700 for two...

ericfx1984 · Mar 21, 2024

Well I talked to the guy and it looks like I'm going to go meet with him Saturday morning

I figure I can sell the LVX 6048 for close to enough money to cover the cost of a pair of these used LV6548s ($800-1000?)

The wife agrees if I can get all 4 lv6548s for $2000 that would be a great deal... But she feels we don't really need 4

Quattrohead · Mar 22, 2024

If I were buying inverters today, there are better options......but at that price they are ok...not great.
You are going to spend cash on a combining system.
I do like mine but would never consider running the whole house 24/7.

LV 6548, split phase? Thoughts? Used cost?

ericfx1984

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