[CambridgeContractorPermitPulse](/v/cambridgecontractorpermitpulse) / compare

# The Boston Solar Company, LLC vs 621 Energy LLC: CambridgeContractorPermitPulse comparison

**621 Energy LLC's demolition or solar project cost of 259,860 is 1.4x The Boston Solar Company, LLC's 181,549 (99th percentile). The Boston Solar Company, LLC is dated 2026-07-07; 621 Energy LLC 2026-06-29.**

Data as of 2026-11-05 · [Compiled by Zalwin](/research/cambridgecontractorpermitpulse) from City of Cambridge sprinkler and standpipe, crane / boom / pump truck, excavation, demolition and solar installation permits (data.cambridgema.gov) Copy citation

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Both records plus every comparable record, with all columns and source links · Card, Apple Pay, Google Pay or Link via Stripe

## How does The Boston Solar Company, LLC compare to 621 Energy LLC?

| Field | The Boston Solar Company, LLC | 621 Energy LLC |
|---|---|---|
| Company | The Boston Solar Company, LLC | 621 Energy LLC |
| Permit | Solar PV and storage installation | Solar PV and storage installation |
| Location | 5 Temple St, Cambridge, MA | 18 Chauncy St, Cambridge, MA |
| Issued | 2026-07-07 | 2026-06-29 |
| Status | Active | Active |
| Building | Commercial / Mixed Use | Commercial / Mixed Use |
| Solar system | 53.55 kW, 90 panels | 67.13 kW, 127 panels |
| Inverter | SE50KUS | SolarEdge SE50K-US |
| Solar project cost | $181,549 | $259,860 |
| demolition or solar project cost percentile | 97th | 99th |
| Score | 60/100 | 60/100 |
| Peer rank and all 500 records (CSV) | Every comparable record ranked, with amounts, dates and scores 🔒 Click to unlock → |
| Official source URLs for every peer record | Direct links to each record at its government source 🔒 Click to unlock → |

Official records: [The Boston Solar Company, LLC](https://data.cambridgema.gov/d/whpw-w55x) · [621 Energy LLC](https://data.cambridgema.gov/d/whpw-w55x)

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From City of Cambridge permit data on data.cambridgema.gov. Details are as entered on each application. Permits pulled under a person's name are excluded, personal names (applicants, agents) and owner-occupancy are never shown, and homes are shown by street only; solar system size and cost are as the installer entered them. Verify with the City of Cambridge.

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