EV Solar Charging Savings Calculator
Estimate solar energy used for EV charging, remaining grid energy, grid cost avoided, foregone export revenue, and the signed annual difference.
Solar used = min(surplus, need); remaining grid = need − solar used. Share is undefined when need is zero. Annual avoided grid cost and foregone export use 365 × solar used × each entered rate; signed net difference can be negative. No seasonal scheduling or conversion losses are modelled. S ≥ 0; N ≥ 0; rᵍ ≥ 0; rᵉ ≥ 0
A QUICK WALKTHROUGH
How to use this tool
- Estimate solar energy used for EV charging, remaining grid energy, grid cost avoided, foregone export revenue, and the signed annual difference.
- Solar used = min(surplus, need); remaining grid = need − solar used. Share is undefined when need is zero. Annual avoided grid cost and foregone export use 365 × solar used × each entered rate; signed net difference can be negative. No seasonal scheduling or conversion losses are modelled.
Formula and scope
Solar used = min(surplus, need); remaining grid = need − solar used. Share is undefined when need is zero. Annual avoided grid cost and foregone export use 365 × solar used × each entered rate; signed net difference can be negative. No seasonal scheduling or conversion losses are modelled. S ≥ 0; N ≥ 0; rᵍ ≥ 0; rᵉ ≥ 0
Assumptions
All numerical inputs are user supplied; no numerical recommendations are prefilled.
Local processing
Values stay in your browser.
GOOD TO KNOW
Common questions
What does this estimate?
It calculates only from your inputs; it is not equipment or safety advice.
Are inputs uploaded?
No. All calculations run locally in your browser.