Model Household Demand
Segment base load, seasonal load, and flexible load. This reveals which demand can be shifted to lower-cost periods.
A Repeatable Sizing Model
The core sizing problem is matching production, storage, and charging behavior to your demand profile. Oversized systems can delay payback, while undersized systems fail to reduce high-cost peak usage.
Analyze Utility Rate Structure
Time-of-use rates, demand charges, and export credits materially change battery value. Financial models must use your actual tariff, not generic assumptions.
Constrain EV Charging Windows
Map when charging can realistically happen and align storage strategy around those windows. This prevents mismatch between theoretical and practical savings.
Common Sizing Mistakes
- Assuming flat usage across all seasons
- Ignoring EV charging behavior variability
- Overestimating export compensation stability
- Choosing battery size from marketing bundles instead of demand data
What Good ROI Planning Looks Like
Good planning produces a range of outcomes under conservative, expected, and optimistic scenarios. The target is a system you can defend financially, not just one that looks good in a sales proposal.