Which panel and system would be best for us? How to decide btw competing quotes.

[casan]

We got six quotes altogether. We are down to this two. We have had quotes from nationwide companies like SolarCity to small startups. This two are from local medium size companies that have several years experience and installations in the state.

[J.P.M.]

You are not doing enough homework.......you need at least four to five more quotes from reputable companies on top of what you have already done. You will become a more informed consumer the more quotes you get.

Keep working and you will save thousands of $ and have a much better outcome.

I'm not sure I'd rely on most vendors for much information. Usually a process not unlike like the fox guarding the hen house. Get your own info. You'll get more accurate answers to your own questions, really learn stuff, and get an added bonus of having a better chance of finding out find out which vendors are knowledgeable and which are full of B.S. when you ask questions of vendors for which you already know the answers.

[DanS26]

You are not doing enough homework.......you need at least four to five more quotes from reputable companies on top of what you have already done. You will become a more informed consumer the more quotes you get.

Keep working and you will save thousands of $ and have a much better outcome.

[casan]

Other question: what other options are there to finance a solar installation? We've only found 2: a local bank and the contractors. Tried to get more but those other companies work with their own installers and those are not well known companies.

[casan]

ok so it sounds like you have a 100 amp msp. The service is almost certainly larger like 250a or more.

I was asking which specific enphase micro inverters where they planning to use? Should be at least m250 or s280

m250

[casan]

Before you go any further:

1.) What are your goals in getting solar PV ?

We want to get solar to reduce our dependency on the grid and to save money in the long run.

2.) Do you know enough about how PV works to make a reasonably accurate evaluation of the quotes to estimate how well any system will meet your goals ?

Yes, of all the quotes these two are the best ones. What we are not sure about is the brands involved. As far as I have researched they are both good, so we wanted to get people's experiences with either one that might help us decide.

3.) Evaluate quotes on the basis of most long term bang for your buck - NOT necessarily first cost - think long term and think quality and value - including the vendor.

Yes, vendors are reputable. We want more input on quality and value. I know microinverters is the newest one. Some of the representatives mentioned that string w/ optimizer was as good since microinverters are at the mercy of the weather and fail more. That we don't know.

4.) I'm no expert, but even if I was, I couldn't offer an opinion or guess based on the information supplied.

If you have not done so already, I'd respectfully suggest you download an (outdated but free) copy of "Solar Power Your Home for Dummies" from the net, or spend ~ $20 or so on an updated version. A few hours invested in reading will probably pay big dividends.

Thank you for the suggestion, I'll look at it. I'm familiar with how solar work, not so much about brand differences.

Come back after reading and get some of the rest of your knowledge gaps filled in.

Take what you want of the above. Scrap the rest.

Answers above in blue.

[ButchDeal]

Enphase micro-inverters

Our service is 100Amps and the panel is full. It is not required per se, but we want to install a heat pump water heater and we don't have the capacity to do this. AFAIK, the service needs to be upgrade from the pole and not only the panel. Of course, everything will be permitted.

ok so it sounds like you have a 100 amp MSP. The service is almost certainly larger like 250a or more.

I was asking which specific enphase micro inverters where they planning to use? should be at least M250 or S280

[casan]

Generally you do the base comparison using pre-incentive $/watt
Which micros where they planning to use with the SolarWorld modules?

you said the one is going to upgrade your service but did you mean Service panel? The service is the line coming to the building and is generally quite expensive.
Is the MSP (Main Service Panel) upgrade required for the install? if so what is the other planning to do to get the system approved?

Enphase micro-inverters

Our service is 100Amps and the panel is full. It is not required per se, but we want to install a heat pump water heater and we don't have the capacity to do this. AFAIK, the service needs to be upgrade from the pole and not only the panel. Of course, everything will be permitted.

[J.P.M.]

Before you go any further:

1.) What are your goals in getting solar PV ?

2.) Do you know enough about how PV works to make a reasonably accurate evaluation of the quotes to estimate how well any system will meet your goals ?

3.) Evaluate quotes on the basis of most long term bang for your buck - NOT necessarily first cost - think long term and think quality and value - including the vendor.

4.) I'm no expert, but even if I was, I couldn't offer an opinion or guess based on the information supplied.

If you have not done so already, I'd respectfully suggest you download an (outdated but free) copy of "Solar Power Your Home for Dummies" from the net, or spend ~ $20 or so on an updated version. A few hours invested in reading will probably pay big dividends.

Come back after reading and get some of the rest of your knowledge gaps filled in.

Take what you want of the above. Scrap the rest.

[ButchDeal]

Generally you do the base comparison using pre-incentive $/watt
Which micros where they planning to use with the SolarWorld modules?

you said the one is going to upgrade your service but did you mean Service panel? The service is the line coming to the building and is generally quite expensive.
Is the MSP (Main Service Panel) upgrade required for the install? if so what is the other planning to do to get the system approved?

[casan]

Hello all,

We have four quotes for a solar system. We are trying to decide between basically two of them.

Company A offers a 7.28KW system using Qcell 280W panels, SolarEdge string inverters/optimizer.

Company B offers a 6.67KW system using SolarWorld 290W panels with Enphase micro inverters.

Both are reputable local companies with several installations. A is a bit more expensive than B. A is also willing to upgrade our electrical service to 200A (separate quote) whereas B only does solar.

Which system would the experts here recommend?