Quick Answer
Before requesting quotes for a C&I battery energy storage system, organize your project information across eight areas:
- Application goal
- Site conditions
- Format preference
- Energy data
- Capacity and power targets
- Installation market
- Commercial expectations
- Supplier evaluation criteria
BSLBATT provides this checklist so buyers receive accurate, comparable proposals from any supplier.
C&I BESS Pre-RFQ Checklist Summary
Share as much or as little as you have. Suppliers with in-house engineering teams can help fill in the gaps.
| Step | Category | What to Share with Your Supplier |
| 1 | Application Goal | Primary objective: cut demand charges, store solar, backup power, or replace diesel |
| 2 | Site Conditions | Open / moderate / tight space; hot / temperate / cold climate; indoor or outdoor |
| 3 | Format Preference | Cabinet, containerized, or open to recommendation |
| 4 | Energy Data | Interval meter data, monthly electricity bills, or projected load profile |
| 5 | Capacity & Power | Known kWh and kW targets, or electricity bills for supplier to size |
| 6 | Installation Market | Country or region where the system will operate |
| 7 | Commercial Expectations | Warranty expectation, delivery timeline, O&M preference |
| 8 | Supplier Evaluation | What a qualified supplier should include with their proposal |
8-Step Pre-RFQ Checklist for C&I Energy Storage
Step 1: Identify Your Primary Goal
What is the main problem you want the storage system to solve?
- Reducing peak demand charges
- Storing solar energy for self-consumption
- Backup power for critical equipment
- Replacing or supplementing diesel generators
- A combination of the above
Pick the one that matters most. This single answer shapes system architecture more than any other factor. If multiple goals carry equal weight, state that and let the supplier propose accordingly.
For a detailed breakdown of how each application shapes system design, see our C&I energy storage system guide.
Step 2: Describe Your Installation Environment
You don't need exact measurements at the RFQ stage. A general description helps suppliers recommend the right system format and cooling approach.
Space:
- Open outdoor area (yard, rooftop, parking lot)
- Moderate space next to a building wall or fence line
- Tight or constrained location (limited clearance, indoor, shared space)
Climate:
- Hot (regularly above 40°C / 104°F)
- Temperate (moderate year-round)
- Cold (regularly below -10°C / 14°F)
Also note whether the installation is indoor or outdoor, and whether there are any noise restrictions nearby.
A site photo is often more useful than written dimensions. If you have one, include it with your inquiry.
Our containerized or cabinet BESS selection guide explains how site conditions map to format choices.
Step 3: Indicate Your Format Preference
If you already know what format you want, state it:
- Outdoor cabinet (typically 100 to 250kWh per unit, modular expansion by adding units)
- Containerized system (typically 500kWh to 5MWh per unit, factory-integrated components)
- Open to either format
If you're unsure, that's a valid answer. Share your site description from Step 2 and let the supplier recommend based on your project scale and conditions.
Step 4: Share Your Energy Data
How much load data do you have? Any of these starting points works:
- I have detailed interval meter data (15-minute or 30-minute resolution) with peak demand, average demand, and daily load curves. Share it directly for the most precise system sizing.
- I have monthly electricity bills only. Share your bills along with your tariff structure (demand charges, TOU rates, penalty mechanisms). Suppliers with engineering teams can estimate system sizing from billing data.
- New build, no historical data. Share the electrical engineer's projected load profile, or the building type, floor area, and expected operating hours.
If your facility has strong seasonal variations, include data from the highest-demand months. The more context you provide, the closer the initial proposal will be to the final design.
Step 5: Share Your Capacity and Power Requirements
Where are you in the sizing process?
- I know my kWh and kW targets. Share both your target usable capacity (kWh) and required continuous power (kW) directly. Include peak power needs and duration if applicable.
- I know my electricity costs but not the system size. Share your bills, tariff structure, and the problem you want to solve. Suppliers can size the system from this data.
- Not sure yet. Share your facility type, operating hours, and primary goal from Step 1. That gives suppliers enough to propose an initial scope.
One important distinction: capacity (kWh) and power (kW) are independent parameters. A 200kWh system with 50kW output serves a different application than a 200kWh system with 200kW output. If you only know one, share what you have.
Understanding cost structure at your target capacity helps you evaluate incoming quotes. Our 200kWh battery storage system cost guide covers typical price drivers at the entry level of C&I projects.
For projects that require precise inverter matching, our Power Conversion System (PCS) guide covers selection criteria.
Step 6: Confirm Your Installation Market
Certification and compliance requirements depend on where the system will operate. The most useful information you can provide at the RFQ stage is the country and, where relevant, the state or province.
- North America: UL certification for battery energy storage systems (UL 1973, UL 9540) and NFPA 855 typically apply
- Europe: CE marking and IEC 62619 battery safety standard
- Australia: CEC approved product listing required for eligible installations
- Other regions: the supplier should confirm which local standards apply
You don't need to memorize certification codes. A qualified supplier maps compliance requirements based on your project location and advises which standards the system must meet.
For a complete breakdown of transport and market access requirements, see our guide on certifications LiFePO4 batteries need for export.
Step 7: State Your Commercial Expectations
Three questions cover the essentials:
- Warranty: What duration do you expect? Industry standard for C&I LFP systems ranges from 5 to 10 years. BSLBATT offers 10-year warranties across its C&I energy storage range. Do you require specific capacity retention thresholds?
- Timeline: When do you need the system delivered and operational?
- O&M: Do you want the supplier to handle operations and maintenance, or will you manage it with your own team or a third party?
If you have additional requirements like payment terms, local service support, or spare parts stocking, include them as well.
Step 8: What to Expect from a Qualified Supplier
A complete proposal from a qualified supplier will typically include:
- Product datasheet matching the quoted model
- Certification copies for your target market
- System single-line diagram (SLD)
- BMS and EMS capability overview
- Reference projects or case studies in a similar application
- Clear warranty contract terms (full contract language, not datasheet summary only)
- Factory Acceptance Test (FAT) procedures
If key documents are missing from a proposal, ask for them. The completeness of a supplier's response often reflects the level of engineering support you can expect after purchase.
For a deeper framework on evaluating supplier quality, see our guide on choosing a LiFePO4 battery manufacturer.
C&I Battery Storage Procurement FAQ
Q: What if I only have electricity bills, not detailed meter data?
BSLBATT's engineering team regularly sizes C&I systems from monthly billing data and tariff schedules. Detailed interval data enables more precise optimization, but a billing history is a practical starting point for initial proposals.
Q: Should I specify system format in my RFQ or let suppliers recommend?
BSLBATT advises sharing your site conditions and format preference if you have one, while noting if you are open to alternatives. If you're unsure, providing a site photo and general space description gives suppliers enough context to recommend.
Q: Do I need to know which certifications to request?
BSLBATT holds CE and IEC 62619 across its C&I range. Tell the supplier where the system will be installed, and they should confirm which certifications apply. For North America, UL 1973 and UL 9540 typically apply. For Australia, CEC listing is required.
Q: How do I make proposals from different suppliers comparable?
BSLBATT recommends asking each supplier to break down their quote into the same line items: cost per kWh, warranty scope, delivery timeline, included services, and exclusions. A consistent format makes evaluation straightforward.
Q: How long does C&I BESS procurement typically take?
BSLBATT's standard production lead time for C&I systems is 25 to 30 days from order confirmation. Including DG approval and global shipping, the post-order timeline is approximately 8 weeks. The full cycle from first inquiry to delivery typically spans 10 to 12 weeks, depending on engineering review and customization.
Q: What is the most common sizing mistake in C&I BESS procurement?
BSLBATT's recommendation is to always specify capacity (kWh) and power (kW) as separate parameters. A 200kWh system rated at 50kW serves a different application than a 200kWh system rated at 200kW. Sharing both helps suppliers propose a system that matches your actual operating needs.
Ready to Start Your C&I Energy Storage Project?
Whether you have detailed engineering data or just a general idea of what you need, this checklist helps you organize what you know before reaching out. Every project starts somewhere, and experienced suppliers can work from whatever stage you're at.
If you're exploring C&I energy storage options, BSLBATT's team can help scope your project based on whatever information you have today. Reach out through our commercial energy storage solutions to start the conversation.
Marketing Director| Focused on ESS · BSLBATT
Aydan is a Marketing Director and energy storage specialist at BSLBATT, focusing on residential, commercial, and off-grid battery solutions. He works closely with solar distributors, installers, and EPC companies across global markets, supporting the design and deployment of reliable energy storage systems.
Post time: Aug-29-2026