I'm very new to solar and have only been looking into them for the past couple weeks and stumbled across this forum a few days ago. My initial interest was to have a battery backup for frequent power outages in our area and the Tesla Powerwall was the only solution I was aware of, so I started there. I quickly realized that just having a Powerwall without solar was not cost effective and the additional benefits of solar would help me justify the long-term expense.
After trying to take in as much information as I can online, I am ultimately down to 3 quotes I'm really considering:
1. Tesla - 11.34kW system with 3 Powerwalls; net cost of $32,560 ($2.87/W); not sure exactly on equipment being used since it isn't specified in the system design; 10/12/20/25 year warranty, or something like that
2. Local Company 1 - 11.62kW system with 2 Powerwalls; net cost of $56,823 ($4.89/W); All SunPower equipment, A415 panels w/microinverter); 25 year warranty on everything except for Powerwall, which is 10 years
3. Local Company 2 - 11.725kW system with 2 Powerwalls; net cost of $51,015 ($4.35/W); LG335N1K-V5 panels, Enphase IQ7-60-2-US inverters; 25 year warranty on everything, including the Powerwall (verified in their contract)
I didn't know anything about inverters until both the local companies tried to tell me how superior their microinverters were compared to Tesla's string inverter. They went on and on about the single point of failure, and also really hammered on how lousy Tesla's online reviews are, while both of their online reviews are exemplary. Despite all that information, I keep coming back to the Tesla quote and trying to justify it because of the 3rd Powerwall and the great pricing.
Sorry for the long ramble. Here's ultimately where I'm trying to get feedback. Are string inverters in the Tesla system a liability like the local companies are telling me that they are? How concerned should I be about the online reviews of Tesla's solar install and/or service? Even though it's a great warranty option, I'm also concerned about the 2nd local company that is providing a 25 year warranty on the Powerwalls. Hard for me to imagine what that service would really look like beyond the Tesla provided one, especially since the Powerwalls have only existed for a few years. Please, tell me where I'm crazy, dumb, foolish, naive, etc....I can take it.
After trying to take in as much information as I can online, I am ultimately down to 3 quotes I'm really considering:
1. Tesla - 11.34kW system with 3 Powerwalls; net cost of $32,560 ($2.87/W); not sure exactly on equipment being used since it isn't specified in the system design; 10/12/20/25 year warranty, or something like that
2. Local Company 1 - 11.62kW system with 2 Powerwalls; net cost of $56,823 ($4.89/W); All SunPower equipment, A415 panels w/microinverter); 25 year warranty on everything except for Powerwall, which is 10 years
3. Local Company 2 - 11.725kW system with 2 Powerwalls; net cost of $51,015 ($4.35/W); LG335N1K-V5 panels, Enphase IQ7-60-2-US inverters; 25 year warranty on everything, including the Powerwall (verified in their contract)
I didn't know anything about inverters until both the local companies tried to tell me how superior their microinverters were compared to Tesla's string inverter. They went on and on about the single point of failure, and also really hammered on how lousy Tesla's online reviews are, while both of their online reviews are exemplary. Despite all that information, I keep coming back to the Tesla quote and trying to justify it because of the 3rd Powerwall and the great pricing.
Sorry for the long ramble. Here's ultimately where I'm trying to get feedback. Are string inverters in the Tesla system a liability like the local companies are telling me that they are? How concerned should I be about the online reviews of Tesla's solar install and/or service? Even though it's a great warranty option, I'm also concerned about the 2nd local company that is providing a 25 year warranty on the Powerwalls. Hard for me to imagine what that service would really look like beyond the Tesla provided one, especially since the Powerwalls have only existed for a few years. Please, tell me where I'm crazy, dumb, foolish, naive, etc....I can take it.