Manufacturer · Canada
e-STORAGE (Canadian Solar)
BNEF Tier 1e-STORAGE is Canadian Solar's utility-scale storage arm (CSI Solar), headquartered in Kitchener, Ontario. It sells the SolBank 20-ft liquid-cooled DC containers (SolBank 3.0 / 3.0 Plus, 5,016 kWh, 314 Ah LFP; SolBank 4.0, 6.25 MWh), the modular FlexBank 1.0 skid (8.36 MWh), KuBank C&I AC cabinets and PowerBlock MV blocks on self-manufactured LFP cells.
- Country
- Canada
- Headquarters
- Kitchener, Ontario
- Official website
- csestorage.com
- Segments
- utility-scale · commercial & industrial
- Makes its own cells
- yes
- BNEF Tier 1
- BNEF Tier 1 (bankability list)
Model
7
7 models
Classes represented
5 MWh 20 ft containers6 MWh+ 20 ft containersAC blocks (PCS integrated)C&I cabinetsLiquid-cooled utility systems
e-STORAGE (Canadian Solar) models in the catalog
Sorted by maximum published energy. Click a model for all variants, the full specification and the list of fields e-STORAGE (Canadian Solar) does not publish.
| Model | Segment | Form factor | Max energy | Max power | Cooling | Chemistry | Cell Ah | AC/DC | Status | Datasheet |
|---|---|---|---|---|---|---|---|---|---|---|
| FlexBank 1.0 (CSI-FlexBank-S-8360 / C-1672) | utility-scale | modular block | 8.36 MWh | 4.18 MW | liquid-cooled | LFP | 314 | DC | announced | |
| SolBank 4.0 | utility-scale | 20 ft container | 6.25 MWh | not published | liquid-cooled | LFP | not published | DC | announced | — |
| SolBank 3.0 Plus (CSI-SolBank-S-PL-5016) | utility-scale | 20 ft container | 5.016 MWh | 2.4 MW | liquid-cooled | LFP | 314 | DC | shipping | |
| SolBank 3.0 (CSI-SolBank-S-5016) | utility-scale | 20 ft container | 5.016 MWh | 2.35 MW | liquid-cooled | LFP | 314 | DC | shipping | |
| KuBank 3.0 (CSI-KuBank-S-940-2h-UL / S-836-2h-IEC) | commercial & industrial | cabinet | 940 kWh | 450 kW | liquid-cooled | LFP | 314 | AC | shipping | |
| KuBank 2.0 (CSI-KuBank2.0-S-277-2h-UL) | commercial & industrial | cabinet | 277 kWh | 125 kW | liquid-cooled | LFP | not published | AC | shipping | |
| PowerBlock 3.0 (ESPB-2H / ESPB-4H) | utility-scale | modular block | not published | not published | liquid-cooled | LFP | not published | AC | shipping |
About e-STORAGE (Canadian Solar)
e-STORAGE is the battery energy storage business of CSI Solar Co., Ltd., the majority-owned operating subsidiary of Canadian Solar Inc. Its global headquarters is in Kitchener, Ontario, with sales offices in the US, UK, Spain, Japan, Australia and Chile; batteries are made in its own plants and with partners in China and the United States on a self-manufactured LFP cell. Utility-scale products are the SolBank 20-ft high-cube DC containers: SolBank 3.0 and 3.0 Plus (5,016 kWh nominal, 314 Ah cells, 12 racks of 1P416S, liquid cooling, 2 h or 4 h ratings), SolBank 4.0 (6,250 kWh, 2–8 h, launched June 2026, datasheet on request only) and the modular open-frame FlexBank 1.0 (five 1,672 kWh cabinets on a skid, 8,360 kWh). C&I cabinets are KuBank 3.0 (940 kWh UL / 836 kWh IEC, integrated PCS) and KuBank 2.0 (277 kWh). PowerBlock is a medium-voltage AC building block combining SolBank, PCS and EMS. Published certifications include UL 9540, UL 9540A, UL 1973, IEC 62619, IEC 62933-5-2 and NFPA 855/68/69, varying by market. Not disclosed: cycle-life test conditions, warranty terms, energy density, SolBank 4.0 cell size, power ratings and dimensions, and DC-side data for PowerBlock.
Photo policy
e-STORAGE (Canadian Solar) provides press-kit imagery under press terms; model cards show those photos with credit and a link to the source.
The e-STORAGE 'Download' page offers datasheets and product/project images ('Download images & files') without any stated usage terms; media contact media@csestorage.com. Product renders on product pages carry no licence statement.
Sources
Manufacturer documents used for this record. Model-level sources are listed on each model card.
- e-STORAGE — Products overview — https://csestorage.com/energy-storage-3plus/
- e-STORAGE — About Us — https://csestorage.com/about-us/
- e-STORAGE — Solutions (SolBank self-manufactured LFP battery) — https://csestorage.com/solutions/
- e-STORAGE — Download page (datasheets, images) — https://csestorage.com/download/
- e-STORAGE BESS Solution featuring SolBank 4.0 — whitepaper WP-SB4.0-2026-001 v1.01 (Jul 2026) — https://csestorage.com/wp-content/uploads/2025/06/WP-SB4.0-2026-001-v1.01-1.pdf