diy solar

diy solar

I Can't Afford So-Called "Tier 1" Equipment. What's Good at Tier 2?

Yeah, I’m trying to catch up and that’s what I’m seeing too…

The 6548 is single-phase, so less interesting to me (2-box for split-phase) but the LVX6048 looks like a contender.

I think the LVX6048 had some issues.

Yes, you will need 2 LV6548's for split phase. A pair from Ian is about $2K USD.

I’m reading that it has an integrated Autotransformer (small?) but cannot find any spec on maximum imbalance supported.

25A is the nominal output current per phase which is 3kW per phase, so does that mean exceeding 3kW on a single phase can only be done over short duration (to supply motor inrush current, for example)?

Is that what the ‘inrush current / duration’ spec of 30A for 20ms is intended to mean? Up to 3600W per leg for up to 20ms?

Does that mean the integrated Autotransformer cannot support 3600W on one leg continuously. even if there is no load on the other leg?

And the maximum OCPD of 81A, does that mean it can supply as much as 9.7kW fas long as the spike is under 1ms?
 
Last edited:
I went back and checked and I don’t believe you have this right.

LVX6048 is a 6kW split-phase inverter (almost certainly without a ‘big’ transformer due to modest weight).

Just steer clear of that thing........
LV6048 is a ‘split-phase ready’ 120VAC single-phase inverter - two are needed to generate split-phase power.

It is split phase but 6Kw total. Compare to a LV6548 which is 6.5Kw per unit so 13Kw total for a pair in split phase.
The Sungold LFP6K-48-120-SP is a LF inverter integrating a big transformer - it weighs 121bs and can deliver 300% surge power to either leg (9kW to either leg).

You need to look at standby consumption, LF takes power.

The Sungold TP6048 is a dual HF split-phase inverter (likely without any transformer and certainly not a heavy one) - it weighs 73.2lbs and does not specify any surge rating.

The MPP LVX6048 is also a dual HF split-phase inverter which cannot contain a heavy transformer - it weighs 57.2lbs and specifies a surge rating of up to 3.6kW per leg for 20ms and up to 9.7kW per leg for 1ms.

This unit was sealed for outdoor use, it suffered from problems and is just 3Kw inverters in the same box. Only one MPPT in the unit I believe.
The SRNE AFS48100U200-H is a 10kW dual-HF inverter with a specified surge rating of up to 20kW (10kW per leg) which I would take with a grain of salt. It almost certainly contains no transformer since it weighs only 44lbs (the lightest of the group despite having the highest continuous and surge ratings).
 
Setting the facts straight on the MPP LV 6048:
These units output 120 AND 240 with one AIO unit.
The max output is 27.3Amp x 240 Volts is 6552W
Each leg (L1 L2) are limited with one AIO to 3225 W Continuous, short surges over this.
The cost of a MPP 6048 from Maximum Solar is $943 USD each plus applicable taxes & shipping.
You can also purchase from Ian at Watts 247 for a bit more, but also get his assistance support when needed. (likely well worth it).
The MPP 6048 is capable of being set for 120/240 or 208-three phase (with three units) or 120 120 (full 6552W single phase) if desired.
Up to three units can be set parallel for 27.3 x 3 = 81.9Amp 240 Volt split phase.
A single 6048 is best run on at least 200Ah battery, and add another 200Ah (min) for each additional AIO, to get full capacity out of the unit.
The input and output terminals are all set up in groups 4, ( G L1 L2 N ) making connection to a sub panel a breeze.
Internally each MPP 6048 is TWO inverters identical, set side by side, each with 27.3A continuous output capacity, in split phase each outputs one Leg, with a max output per leg of 27.3 x120 v = 3276 continuous.
Each AIO has two MPP inputs for PV but limited to 145vDC and 4000W. ( Run my strings at about 90 volts to allow enough head room for minus 30's
The MPP 6048 has slightly higher standby current than the 6548. which is due to the twin inverters side by side draw more power to both run.
None of the above is guessing or speculation, I have two units, first since Feb 2021. They run my business 100% off grid (for good) and run about 60 % of my home which is next door, soon to have a third MPP6048 which will take the rest of the house off grid expect during Nov-Jan when I just get too much overcast weather.
My back up genset is a 8kW Champion Cheapie and the Inverters never have any issue accepting the output power to charge up batteries when grid is offline.


Edit: for those addressing Ground-Neutral issues, the MPP 6048 has TWO N-G screws, easily removable. In place the Screws connect N-G during battery inverter operation, removed they do not connect N-G.
I don't have the LVX 6048 LF inverter, I did a lot of research before selecting the LV6048 over it, since my business does need to start some good sized motors, although only occationally. The LVX HAS a big ass transformer mounted right at the top - look up videos by Will and by Ian and you can see them open the case, there is the transformer. Both videos also note the super high standby power consumption that was just way too much for me to accept.

If a newbie needed a small inverter up to 6.5kW for all 120v or a mix of 120/ 240 modest loads in a camp, I would recommend they consider the MPP 6048 as a very low cost, but reliable AIO, easy to connect to a subpanel, capable of split phase right out the box with a single unit costing less than a grand, capable of expansion up to three units if desired in future.
 
Setting the facts straight on the MPP LV 6048:
These units output 120 AND 240 with one AIO unit.
The max output is 27.3Amp x 240 Volts is 6552W
Each leg (L1 L2) are limited with one AIO to 3225 W Continuous, short surges over this.
The cost of a MPP 6048 from Maximum Solar is $943 USD each plus applicable taxes & shipping.
You can also purchase from Ian at Watts 247 for a bit more, but also get his assistance support when needed. (likely well worth it).
The MPP 6048 is capable of being set for 120/240 or 208-three phase (with three units) or 120 120 (full 6552W single phase) if desired.
Up to three units can be set parallel for 27.3 x 3 = 81.9Amp 240 Volt split phase.
A single 6048 is best run on at least 200Ah battery, and add another 200Ah (min) for each additional AIO, to get full capacity out of the unit.
The input and output terminals are all set up in groups 4, ( G L1 L2 N ) making connection to a sub panel a breeze.
Internally each MPP 6048 is TWO inverters identical, set side by side, each with 27.3A continuous output capacity, in split phase each outputs one Leg, with a max output per leg of 27.3 x120 v = 3276 continuous.
Each AIO has two MPP inputs for PV but limited to 145vDC and 4000W. ( Run my strings at about 90 volts to allow enough head room for minus 30's
The MPP 6048 has slightly higher standby current than the 6548. which is due to the twin inverters side by side draw more power to both run.
None of the above is guessing or speculation, I have two units, first since Feb 2021. They run my business 100% off grid (for good) and run about 60 % of my home which is next door, soon to have a third MPP6048 which will take the rest of the house off grid expect during Nov-Jan when I just get too much overcast weather.
My back up genset is a 8kW Champion Cheapie and the Inverters never have any issue accepting the output power to charge up batteries when grid is offline.


Edit: for those addressing Ground-Neutral issues, the MPP 6048 has TWO N-G screws, easily removable. In place the Screws connect N-G during battery inverter operation, removed they do not connect N-G.
I don't have the LVX 6048 LF inverter, I did a lot of research before selecting the LV6048 over it, since my business does need to start some good sized motors, although only occationally. The LVX HAS a big ass transformer mounted right at the top - look up videos by Will and by Ian and you can see them open the case, there is the transformer. Both videos also note the super high standby power consumption that was just way too much for me to accept.

If a newbie needed a small inverter up to 6.5kW for all 120v or a mix of 120/ 240 modest loads in a camp, I would recommend they consider the MPP 6048 as a very low cost, but reliable AIO, easy to connect to a subpanel, capable of split phase right out the box with a single unit costing less than a grand, capable of expansion up to three units if desired in future.
Thanks for the info. I'm curious where do you get the 27.3 amp output spec? I don't see it in the manual
 
How about this for comparison:

A pair of LV6548's is $2099 from Ian ($1999 without support from Ian)

To equal the output would require a pair of LV 6048's, $1099 x 2= $2198 (no support from Ian)

I know what I'd purchase.
 
How about this for comparison:

A pair of LV6548's is $2099 from Ian ($1999 without support from Ian)

To equal the output would require a pair of LV 6048's, $1099 x 2= $2198 (no support from Ian)

I know what I'd purchase.
If one lv6548 goes out you are out of commission. If one 6048 goes out at least you can still run some loads.
 
Growatt's?
:)
...That's exactly where I was going. Just took a photo of the specs plate in the side of the Growatt 5000 units. 22AMP AC OUT. Easy to work with. The extra needed is the External Autotransformer for the 120AC output. The short period of time I've had them they work flawlessly. Parallel is no brainer, shared load, and forcing a unit down for testing, my 120/240 loads continue working (Within rated capacity)
Pricing @$750/unit. SPF 5000
 
...That's exactly where I was going. Just took a photo of the specs plate in the side of the Growatt 5000 units. 22AMP AC OUT. Easy to work with. The extra needed is the External Autotransformer for the 120AC output. The short period of time I've had them they work flawlessly. Parallel is no brainer, shared load, and forcing a unit down for testing, my 120/240 loads continue working (Within rated capacity)
Pricing @$750/unit. SPF 5000
But you can't connect ac input to it and have to use a chargeverter to charge the battery from the grid
 
...That's exactly where I was going. Just took a photo of the specs plate in the side of the Growatt 5000 units. 22AMP AC OUT. Easy to work with. The extra needed is the External Autotransformer for the 120AC output. The short period of time I've had them they work flawlessly. Parallel is no brainer, shared load, and forcing a unit down for testing, my 120/240 loads continue working (Within rated capacity)


Pricing @$750/unit. SPF 5000
Plus transformer........
 
Only for the split phase, one can reconfigure for one leg if needed.

I just throw my transfer switch and go back to grid. :)
Only for the split phase, one can reconfigure for one leg if needed.

I just throw my transfer switch and go back to grid. :)
The lv6048 is more versatile imo. I'm starting with one, just to run my minisplits, so $1100 new. With 6548 i would have to start with two from the get go.

If I want to add more loads later I can add another one.

Also, my peak demand is 15kw. I would need 4x 6548s for that but only 3x 6048s. No contest the 6048 is the better choice for me
 
But you can't connect ac input to it and have to use a chargeverter to charge the battery from the grid
Actually you can, but I wouldn't recommend it.
And I believe that the chargeverter is the best option for all of the Voltronics style off grid AIO's. Because it allows you to not switch completely back to grid. In a low SOC situation.
 
Actually you can, but I wouldn't recommend it.
And I believe that the chargeverter is the best option for all of the Voltronics style off grid AIO's. Because it allows you to not switch completely back to grid. In a low SOC situation.
How is that an advantage?
 
How is that an advantage?
The only way to charge from the grid is to also draw all loads from the grid.
With the chargeverter, you can use the grid to supplement your battery. If I were to need the grid. It's only to barely keep me going until the sun shines. Instead of switching completely over to the grid. Until I reached a higher SOC.
 
The only way to charge from the grid is to also draw all loads from the grid.
With the chargeverter, you can use the grid to supplement your battery. If I were to need the grid. It's only to barely keep me going until the sun shines. Instead of switching completely over to the grid. Until I reached a higher SOC.
So my question if my battery is low, let's say at night when there is no pv, why would I want to keep pulling from battery instead of switching 100% to grid. It seems like pulling using a charger to charge battery and pull from it would shorten the lifespan of the battery, and would also be more energy intensive than just switching fully to grid.
 
Back
Top