I save 100% of my electric usage and only pay the account fee. The panels ($450 each) are warrantied for 25 years and the inverter (<$1k) is 10 years. All built in the USA. The install company I bought from have been in business for over 20 years. You are correct that solar doesn't operate during dark.
My ROI is 10.5 years. Solar isn't about profit since most electrical companies only offer NET metering. Its about making enough solar to meet your YEARLY electrical needs.
Batteries not required unless you are off grid.
You CAN forget the batteries, save your money. Its called Net Metering. Btw, Maryland is considered one of the top states for Net Metering. Net metering is available in most areas in US and Canada.
The following will explain what Net metering is...
Utility customers with net metered systems will be credited for each kilowatt hour produced by their system and each month will be billed for the number of kilowatt hours they used, minus the number of kilowatt hours generated.
If your generation exceeds your usage for a given month, you will receive a credit for each excess kilowatt hour, to be applied in later months when you generate less electricity than you consume. Utilities may not charge net metered customers new or additional fees or rates that they don’t charge non-generating customers of the same rate class.
Copied from: Net metering in Maryland - Solar United Neighbors
Sure it does, prove me wrong.
20 year utility guy here. Both of you are right in your own way.
Renewable i.e solar and wind are considered non dispatchable meaning I can't scale output or 'dispatch' it the way I can baseload coal, hydro, nuclear, or natural gas. When the wind blows, great, when the sun shines, great. When it doesn't, those that are still connected to the grid still need access to power from a traditional source so while renewables can help ease the demand on traditional sources, they can, from an engineering and demand standpoint, never truly replace them.
Renewables aren't as efficient everywhere and load profiles vary. Southern states where the highest demand is in the summer also have access to the greatest solar energy during high demand can see a benefit. Some places are winter peakers meaning they have mild summers and cold winters requiring greater electricity in January and February for heating sources, furnace blowers, lighting, etc. Their potential for solar load is less due to shorter daylight hours, less solar energy, cloud cover, etc. So what works for one guy in one place with one utility may or may not work for someone else with a different utility. Examples have HUGE differences.
Most renewables are subsidized in some way skewing the true costs.
Net metering: your local and state rules and rates may vary but for the most part, the utility is going to 'pay' you the same kWh rate as they purchase other power. Meaning, if my wholesale rate is $0.05 kWh and my retail rate is $0.15 kWh I'm going to pay you the $0.05 for any kWh your system provides as you are simply another generation outlet for me to tap into. Any ROI calculation should consider how much and how the utility actually 'pays' you. Cash is cash and credit is credit. Consider that when doing calculations. Don't let a salesperson use a net rate, the kWh rate you are currently paying, as part of a calculation if that's not what you will get.
Are panel costs coming down and arrays more efficient?? Sure but consider ALL costs over time and include utility service rate increases in your calculation.
A lot of solar users really don't care about the upfront or ongoing costs. They are not the type to really care about the ROI or botton line financials.
Service charge: If you are still connected to the system, you still have access to all of the lines, poles, transformers, substations, repair, billing, operations and maintenance of the utility as any other customer regardless if you generate or not so you are still responsible for your share of the bill. Plus, if you want to 'sell' the energy back to the utility, who has all of the liability of the lines in place to transport 'your' energy? The utility company is still on the hook for maintenance.
There is a place and time for residential solar. It's not a one size fits all proposition.