I have been looking at getting PV system to replace my SDG&E Tier 3 and 4 usage for the past couple years. I think the current PV pricing ($3.5 to $3.75 per watt before federal credit) plus the outrageous Tier 4 pricing of $0.38 / kWh (!) has finally pushed the ROI into a more realistic 7 years or so. Here is my past 12 month usage history
This is a total about 6600 kWh per year or $1400 a year. I already plugged my usage number into this handy online calculator (which is VERY useful for SDG&E folks).
I am aiming for about a 3kWh system and I already started getting quotes from local installers. 2kWh is probably enough for my intended scenario (i.e eliminate Tier 3 and 4 usage). However, to "muddle" the water a bit, I recently got a Prius Plug-In and I would like to be able to charge that (about additional 100 kWh per month) while staying at Tier 1 & 2.
Due to my house roofline and orientation (mainly splitting between East and West), PVWatts says that my 3kW system should produce about 4200kWh. Plugging that into the online calculator (using 2.4kW AC as the input), I should be saving about $1100 a year.
Now I started getting quotes from local installers already. I have to say, this experience is WORSE than dealing with car salesman. With couple exceptions, getting any sort of quote is like pulling teeth. I probably will end up using Enphase M250 micro inverter due to the split system layout. I also could use something like PowerOne with two MPPT. Here are 3 quotes I got so far (all pre 30% tax credit).
Company "M"
3kW System
10 x LG 300W
10 x Enphase M250
$11,900 (or $3.97 / watt)
3kW System
10 x LG 300W
1 x PowerOne PVI 3.0
$11,750 (or $3.92 / watt)
Company "R"
3.38kW System
13 x REC 260W
1 x PowerOne PVI 4.2
$13,825 (or $4.09 / watt)
Company "S"
3.3kW System
12 x LG 275W
12 x Enphase M250
$16,476 (or $4.99 / watt)
3kW System
10 x LG 300W
10 x M250
$16,230 (or $5.41 / watt !!!)
You gotta love Company "S" for quoting the exact same LG+M250 system for over 35% more! When I pointed that out, the salesperson basically played dumb and said that their pricing is very "competitive" (NOT!). The worse part is that Company "S" is a good referral where they installed a SunPower system at $4.7 per watt and a non-SP at $3.5 / watt for family friends.
I am still waiting for more quotes (once again, one of the most painful "shopping" experience). However, company "M" is the quickest to respond and appears to be most willing to work with me. BTW, I got company "M" from a mention within this forum.
$3.90 / watt is still a tad on the high side and that would increase the ROI by another year or so. I am not exactly thrilled with the quote, but that is only about 4 or 5% away from $3.75.
Any comments are welcome!
- Apr - 540
- Mar - 549
- Feb - 452
- Jan - 540
- Dec - 528
- Nov - 604
- Oct - 527
- Sep - 432
- Aug - 810 (unusually hot)
- Jul - 491
- Jun - 586
- May - 550
This is a total about 6600 kWh per year or $1400 a year. I already plugged my usage number into this handy online calculator (which is VERY useful for SDG&E folks).
I am aiming for about a 3kWh system and I already started getting quotes from local installers. 2kWh is probably enough for my intended scenario (i.e eliminate Tier 3 and 4 usage). However, to "muddle" the water a bit, I recently got a Prius Plug-In and I would like to be able to charge that (about additional 100 kWh per month) while staying at Tier 1 & 2.
Due to my house roofline and orientation (mainly splitting between East and West), PVWatts says that my 3kW system should produce about 4200kWh. Plugging that into the online calculator (using 2.4kW AC as the input), I should be saving about $1100 a year.
Now I started getting quotes from local installers already. I have to say, this experience is WORSE than dealing with car salesman. With couple exceptions, getting any sort of quote is like pulling teeth. I probably will end up using Enphase M250 micro inverter due to the split system layout. I also could use something like PowerOne with two MPPT. Here are 3 quotes I got so far (all pre 30% tax credit).
Company "M"
3kW System
10 x LG 300W
10 x Enphase M250
$11,900 (or $3.97 / watt)
3kW System
10 x LG 300W
1 x PowerOne PVI 3.0
$11,750 (or $3.92 / watt)
Company "R"
3.38kW System
13 x REC 260W
1 x PowerOne PVI 4.2
$13,825 (or $4.09 / watt)
Company "S"
3.3kW System
12 x LG 275W
12 x Enphase M250
$16,476 (or $4.99 / watt)
3kW System
10 x LG 300W
10 x M250
$16,230 (or $5.41 / watt !!!)
You gotta love Company "S" for quoting the exact same LG+M250 system for over 35% more! When I pointed that out, the salesperson basically played dumb and said that their pricing is very "competitive" (NOT!). The worse part is that Company "S" is a good referral where they installed a SunPower system at $4.7 per watt and a non-SP at $3.5 / watt for family friends.
I am still waiting for more quotes (once again, one of the most painful "shopping" experience). However, company "M" is the quickest to respond and appears to be most willing to work with me. BTW, I got company "M" from a mention within this forum.
$3.90 / watt is still a tad on the high side and that would increase the ROI by another year or so. I am not exactly thrilled with the quote, but that is only about 4 or 5% away from $3.75.
Any comments are welcome!
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