I currently have MPP LV5048 used in split phase. 12,600 was 42 panel 300 watt tillable pv array. I need more wattage available at times and a significant part of the day My consumption is around 7,000 watts in a large home. I currently have 30 kwhr of lithium battery hoping to increase to at least 60 kwhr. I would like to run HVAC and well and lighting computers etc. I dont mind cutting HVAC off when using oven ,dryer, etc either manually or with relay. Hot water is propane tankless and direct solar with heat exchanger. I off course would love not to have to cut power to HVAC but I also need to start it a 2 stage 5 ton unit with scroll compressor not inverter type.
I am not selling to grid just using it as a backup. I plan to have an electric vehicle in 1-2 years also.
I bought the MPP LV5048 alone because at the time they only had 1 available even though I planned on getting 2 units or possibly 3 units if 2 not enough and I wanted to get at least partially up and running. Now I am ready to get another unit with everything set up already for parallel units but like others I now see they have the MPP LV6548 available.
I am believe I will end up getting 3 LV5048 s or another inverter. I considered 2 sunny boy island 6,000 watt inverters as well as Solark 12 which I really liked but would really need 2 and thats way too costly at around 13,000.
So I researched some more especially the Growatt 12k unit and pair of LV6548 . It has low PV volt input at 150v and also very low pv watts input at 7,000 watts unless they mean per MPPT controller large peak power at 36kw due to its low frequency transformer and extra boards available cheap and 240 split phase by itself.
The low PV input is a no go and borderline even if 14kw total. The low PV voltage input is also undesirable but similar to LV5048. So I am leaning against this one.
The MPP LV 6548 has desirable 250v pv input so I could double from 3 to 6 panel strings and/or have less power loss in transmission. The 13kw is almost as much as 3 LV 5048 s and I believe the peak would be ample to start the HVAC since it starts as 1 st stage (about 3 ton) then if needed increases to stage 2 which is unusual but its a geothermal and runs the well at same time though it is soft start and never requires more than 1500 watts so no start-up peak. I would likely be using 3,000 to 6,000 watts (or could limit it to this amount) when the HVAC would need to start so I assume with 26kw peak it would have at least 20kw available to start the HVAC which is the same as 2 LV 5048 s with no load .
Sorry for the long post but my question is What do you think?
1. 2 LV5048 s for now realizing I will probably need a third.
2. Get a pair of the MPP LV6548 s for less than 2 more LV 5048 s and a little less power and take up less room. (Might keep Lv 5048 for emergency but more likely sell it or use at another location.
3. Growatt 12 k which I have already ruled out unless something I haven't thought of.
4. Some other inverter that does split phase and will provide 13kw with 26kw peak for the same or a little more cost than 2 MPP LV6548 s which is around $2600. I would pay some more for better quality or 15kw and 30kw peak output etc or just considered better quality with good support.
Any thoughts or comments appreciated.
Thanks
I am not selling to grid just using it as a backup. I plan to have an electric vehicle in 1-2 years also.
I bought the MPP LV5048 alone because at the time they only had 1 available even though I planned on getting 2 units or possibly 3 units if 2 not enough and I wanted to get at least partially up and running. Now I am ready to get another unit with everything set up already for parallel units but like others I now see they have the MPP LV6548 available.
I am believe I will end up getting 3 LV5048 s or another inverter. I considered 2 sunny boy island 6,000 watt inverters as well as Solark 12 which I really liked but would really need 2 and thats way too costly at around 13,000.
So I researched some more especially the Growatt 12k unit and pair of LV6548 . It has low PV volt input at 150v and also very low pv watts input at 7,000 watts unless they mean per MPPT controller large peak power at 36kw due to its low frequency transformer and extra boards available cheap and 240 split phase by itself.
The low PV input is a no go and borderline even if 14kw total. The low PV voltage input is also undesirable but similar to LV5048. So I am leaning against this one.
The MPP LV 6548 has desirable 250v pv input so I could double from 3 to 6 panel strings and/or have less power loss in transmission. The 13kw is almost as much as 3 LV 5048 s and I believe the peak would be ample to start the HVAC since it starts as 1 st stage (about 3 ton) then if needed increases to stage 2 which is unusual but its a geothermal and runs the well at same time though it is soft start and never requires more than 1500 watts so no start-up peak. I would likely be using 3,000 to 6,000 watts (or could limit it to this amount) when the HVAC would need to start so I assume with 26kw peak it would have at least 20kw available to start the HVAC which is the same as 2 LV 5048 s with no load .
Sorry for the long post but my question is What do you think?
1. 2 LV5048 s for now realizing I will probably need a third.
2. Get a pair of the MPP LV6548 s for less than 2 more LV 5048 s and a little less power and take up less room. (Might keep Lv 5048 for emergency but more likely sell it or use at another location.
3. Growatt 12 k which I have already ruled out unless something I haven't thought of.
4. Some other inverter that does split phase and will provide 13kw with 26kw peak for the same or a little more cost than 2 MPP LV6548 s which is around $2600. I would pay some more for better quality or 15kw and 30kw peak output etc or just considered better quality with good support.
Any thoughts or comments appreciated.
Thanks