SunMath has been helping consumers figure out if it makes financial sense to go solar since 2009. We take great pride in the accuracy and completeness of our highly customized reports. We know that detailed analysis is critical since a single variable can be the difference between a 5 and 25 year payback.
Not only is our solar calculator accurate, but it is designed on an unbiased, 3rd party platform. Unlike other online solar calculator providers, SunMath doesn’t make any money if you choose to go solar. SunMath doesn’t provide leads to solar installers and we never accepts finders fees. Our #1 goal is to provide valuable, easy-to-use tools so you keep coming back!
The SunMath solar calculator uses monthly cash flows and takes these variables into account:
and more...
solar calculator
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Browse these pages to see if solar
makes financial sense for YOU!
cumulative cash flow
lifetime energy costs
electric bill
co2 offset
investment statistics
property value
alternative investments
input output
Postal code:
Utility rate plan:
System size in DC watts
Install month
Install year
Gross cost before incentives
System life:
Annual energy cost growth:
annual energy consumption growth:
Discount rate:
Annual panel efficiency decline:
Company A has decided to buy an office building. They believe they can afford to spend $5,000 a month.
After deducting all fixed and variable costs, Company A knows how large a mortgage they can afford.
After adding the value of incentives to the value of the Energy Savings, we determine that Company A is willing to spend $1,649,398.00 more for the same property.
Property without Solar Panels
| Monthly Budget | $5,000 |
| - Security, parking, etc | -$300 |
| - Avg Monthly Energy Costs | -$205 |
| = Available for Mortgage Payment | $4,495 |
If Company A has $4,495 per month, they can afford to spend $1,628,368 on a property.
Property with Solar Panels
| Monthly Budget | $5,000 |
| - Security, parking, etc | -$300 |
| - Avg Monthly Energy Costs | -$118 |
| = Available for Mortgage Payment | $4,582 |
If Company A has $4,582 per month, they can afford to spend $1,649,398 on a property.
The Average Monthly Energy Costs above have been estimated based on your projected energy consumption and on an array of 5000w. Therefore, the property value increase calculated above is how much more your building should be worth. If your actual building is more or less valuable, it will not affect the building value difference. I.e., if you own a $100,000 or $1,000,000 office building, the value of your property should still increase by $31,030
The mortgage for both properties is assumed to be a 30 year fixed at 5.000%.

