BESS Co-Location Add-On
A storage module for co-located solar projects: revenue stack, augmentation and replacement, storage tax credits and combined project returns. Works on its own or alongside any Hillcrest project model.
What it answers
Built around the decisions developers and investors evaluating solar-plus-storage actually make.
- Storage value. Whether adding storage raises or lowers combined returns.
- Revenue stack. Which revenue streams carry the battery's economics.
- Sizing. Power and duration that maximize value for the site.
- Augmentation. What keeping capacity up costs over the project life.
What's inside
- Inputs
- Power, duration, capex, round-trip efficiency, cycling, availability.
- Revenue stack
- Capacity, energy arbitrage, demand charge and program revenue by year.
- Augmentation
- Degradation, augmentation and replacement schedule.
- Tax credits
- Storage ITC and adders.
- Combined returns
- Solar-only against solar-plus-storage returns.
- Checks
- Tie-out flags.
Built for
- Developers adding storage to community or C&I solar
- Investors comparing solar-only and hybrid deals
Not built for
- Standalone utility-scale storage dispatch modeling
Build it, hire it, or buy it
| Build from scratch | Hire a consultant | Hillcrest model | |
|---|---|---|---|
| Cost | Your time | $5,000 to $15,000 | $499, or tailored from $2,500 |
| Time to first answer | 1 to 3 weeks | 2 to 6 weeks | Same day |
| Documentation | Rarely | Varies | Full user guide and sample case |
| You can audit every formula | Yes | Sometimes | Yes, fully unlocked |
Questions
Which versions of Excel does it work in?
Microsoft 365 and Excel 2019 or later, on Windows or Mac. There are no macros. It is built for Excel; Google Sheets is not supported.
What tax credit assumptions does it use?
Credit rates, adders and transferability pricing are inputs, so you set them to current law and your deal. The user guide explains each one and where to confirm it.
Can I use it for more than one project?
Yes: unlimited projects within one company, for up to three named users. Larger teams are covered by a Professional engagement, which includes an organization-wide license.
Do I get updates?
Yes, free for 12 months. We email a new version when inputs or structure change.
What if something is wrong?
Email us. If there is an error we cannot fix within 14 days of purchase, we refund you in full. See the terms.
Can you tailor it to my deal?
Yes. Professional engagements set the model up on your first deal and train your team, from $2,500. Institutional builds tailored to your structure start at $7,500. See team and institutional options.
BESS Co-Location Add-On
Add battery storage to a solar project and see what it does to returns.