New to Grid Tied Home Solar...

   / New to Grid Tied Home Solar... #151  
With the heat wave by SF standards I did something I very rarely do and that was turn on the A/C at 74 with 102 outside...

Even with my daily 20-24 kWh surplus I used 41 Friday and 39 Saturday grid kWh so at .33 cents per kWh the AC added $13 to $14 per day to electric bill...
holy cow....
Its 95 this week here, run ac at 68-70 most of day. My monthly bill rarely goes over $100 for summer months. Then ahain, its $0.06/kwh here. But i looked at previous bills for 2 months ago when we had a 2 week miserable heat wave....ac every day. Bill reached $130.00 that month....ouch. The following month it was $89.70.
 
   / New to Grid Tied Home Solar...
  • Thread Starter
#152  
Record electricity use in the West resulting in rolling outages...

I'm part of the problem going from producer to user due to A/C being on...

100+ heat is rare and even more so day after day... and humidity is all over from desert to tropical with lightening and thunder and cloud bursts.

Coils freezing was a big problem when heat combined the high humidity...
 
   / New to Grid Tied Home Solar... #153  
With the heat wave by SF standards I did something I very rarely do and that was turn on the A/C at 74 with 102 outside...

Even with my daily 20-24 kWh surplus I used 41 Friday and 39 Saturday grid kWh so at .33 cents per kWh the AC added $13 to $14 per day to electric bill...

Our 1.5 hp pool pump motor went out over the winter. I replaced it with a 2hp motor. I forgot it was on manual and it ran non-stop for about 7 days. I noticed that on my bill.... :eek:

My wife is working at home, so the air conditioning is on 24/7 VS we used to have automatic setback when we were at work. We notice that on the bill as well. Using a bout 30% more electricity this year VS years past.
 
   / New to Grid Tied Home Solar... #154  
We had a 14 panel 275 Watt per panel system installed in June of 2014.The 1st year the power co. owed us $9.00 so we broke even, which is what we wanted. Our reason for going solar was that my wife had inherited some money form a great aunt who passed away and we couldn't decide what to do with the $$. We lost a bundle in the '08 market mess so that cured us of that and savings or c.d. accounts were worthless, so we started looking around and saw a lot of people in our area putting in solar. After just a little checking we found out about the 30% tax credit which beats paying taxes on the money stuck in a mattress. This was also the time the federal govt. said that under the new plan utility prices would sky rocket, also our local utility had just received permission from the state p.u.c. commission to raise rates 30% over the next few years. Even though our utility bill was only $129.00 per month we decided that considering all factors solar would be a good self defense investment. As time passed our solar bill crept up a little every year until it was $603.00 this past June so we decided to add more panels.

This is where things got interesting, We called the company that did the original install and after several failed attempts finally got in contact with the owner. We blamed the lack of communication on the covid situation and over looked it.Big mistake. We told the owner that we wanted to add some panels so he showed up and checked our records and said we need 7 new panels and a newer style inverter controller to break even and, even though we were starting to get suspicious, we signed a contract.He had a crew of 2 come out in about a week, one of them spoke fair English and the other only spoke Spanish. No problem just get the job done.They installed the panels the 1st day and asked for a check,I asked about the inverter controller and they said that's not on the work order so it's not included. I called the owner and after a brief discussion he conceded that it should have been included and he would have some one out the next day. The same pair showed up and installed the unit and said they had to go back to the office to use their computer to update our system. Didn't happen.

I called the owner again and he said he would have his tech call me, never happened, after several more calls he stopped taking my calls or replying to my messages. We finally contacted Enphase, the manufacturer of the inverters and they walked us through setting up the wifi connection.But the new panels stopped communicating from mid morning until late afternoon and Enphase said we needed an installer on site to figure it out. The original company disappeared so we finally found a decent company who got a tech out within a couple of days. He got up on the roof and found that none of the connections were tight and then got into the inverter control unit and found the same thing. After tightening all connections and fixing another error the system is up and working well.


The original company was a top notch company when they did the initial install but in 6 years time went to the bottom of the barrel,I suspect that a divorce occurred and wrecked the whole thing. Lesson learned, when your gut tells you something is wrong, listen.
 
   / New to Grid Tied Home Solar...
  • Thread Starter
#155  
Enphase is on my short list should I be in the market at another location...
 
   / New to Grid Tied Home Solar... #156  
Enphase has been very good for us, especially their customer service people. Like anything electronic they update and change products from time to time but so far everything has worked well and been very dependable. The only problems we've had has been on the installer end.
 
   / New to Grid Tied Home Solar...
  • Thread Starter
#157  
Micro Inverters have definite advantages... especially when shading is a factor... plus the software is very good.

My 2008 system is very rudimentary by comparison...
 
   / New to Grid Tied Home Solar... #158  
As an amateur radio operator Enphase has a poor reputation for generating RFI. Perhaps they have remedied this problem but if I can't use my radios during the day then I'll use another brand.

There are 3 ways to do things. Enphase uses microinverters, one at each panel to convert DC to AC ready for your use.

The traditional way is to string multiple panels together to one central inverter. This is called a "string inverter".

SolarEdge places Power Optimizers (DC to DC) at each panel then one central inverter. It is sort of a hybrid between micro inverters and string inverter.

The thing is, a PV panel has an optimal conversion voltage. A PV inverter has to be smart enough to hunt for the optimal conversion voltage because it changes with temperature and brightness. Every panel has manufacturing variations. So for simplicity the string inverter optimizes for the best it can get from the whole batch while the micro inverter can optimize for its one panel. A shaded panel produces less but when wired in series for a string inverter all panels must be limited to sourcing the same current.

The SolarEdge solution has all of the advantages of Enphase micro inverters at lower cost. But higher cost than a string inverter. But there are known RFI quiet string inverters. I have research to do to see if I can use SolarEdge.
 
   / New to Grid Tied Home Solar... #159  
I am adding to the grid the excessive power I generate and dont use. The tax break I get is mostly environmental-so far my power plant has planted an equivalent of 84 trees and cut 11,000 lbs of CO2 emissions. That is the biggest payoff, the second biggest payoff is I will be retiring in a couple of years and on a fixed income. So I have reduced my one utility bill dramatically and added virtually no maintenance or maintenance cost at the same time-that is where it benefits me the most.

My power plant has generated 7.15 megawatts so far since it went online not last January but the January before.
Am i missing something here. 7.15 mw of use would have cost me less than $500 here in idaho. So if you only saved $500 in a year and a half, how long will it take to pay off system.?
 
   / New to Grid Tied Home Solar...
  • Thread Starter
#160  
The attractiveness of solar increases with the cost of Utility power... paying 30 cents per kW presents a different picture compared to someone paying 5 to 7 cents a kW...

Could be a reason why solar is growing here in California plus tax credits.
 

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