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Power Revolution: Pioneering the Future with Autonomous, Distributed, and Flexibly Grid‑Connected Sources

We propose reliable solutions to realize a sustainable society through the spread of renewable energy and EVs—the most familiar and scalable form of large‑capacity battery storage. We strongly promote the introduction and support of the best‑fit mix for enterprises and households alike: renewable systems, EV charging, self‑consumption, and IoT.

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[Hiring] Join Us to Build the Future

I‑S3 supports your next challenge. If you share our vision, let’s talk—individuals and corporate partners are welcome.

Working Environment
  • Hours: 9:00–18:00 (little overtime for office roles)
  • Days off: Weekends & national holidays (rare Saturday work for construction)
  • Annual holidays: 122+ days
  • Bonus: Provided
  • PTO: 3 days at joining; +10 days after 6 months
  • Women are very welcome; many thrive as electricians and in other roles
  • Support for certifications & learning

Recruitment special page

Prefer to get a feel for us first? Check our YouTube channel: EVPV Mirai Channel.

Solar PV & EV Services (Overview)

EPC — Engineering / Procurement / Construction

3D modeling that considers meteorology, obstacles, racking angle, module & inverter characteristics, and stringing; performance evaluation with PVSyst; competitive procurement via direct sourcing; and experienced, efficient construction. See details.

O&M — Monitoring, Call‑out, Reporting

Always‑on monitoring, unlimited call‑outs (incl. minor repair), and biannual reports. We analyze telemetry continuously so we can respond fast—independent of periodic inspection cycles. See details.

Repair / Inspection / Repowering

IV‑curve tracing and on‑site diagnosis even without existing monitoring; optimization proposals incl. optimizers and over‑paneling; we also handle non‑I‑S3 plants. See details · Repowering special.

Residential Roof (Self‑consumption)

Safe, reliable systems leveraging optimizers (e.g., SolarEdge), enabling placement even with shade or on the north side; realistic generation estimates via detailed simulation. See details.

EV Charging — Overview & Installations

Home charging (AC 200V / Level‑2) is the backbone; we also deploy destination charging at hotels and businesses, and multi‑bay load‑sharing at workplaces. Same‑day survey & install available in many cases. Overview · Install examples.

Remote Monitoring & Outage Notifier

Cloud‑connected programmable camera for plant monitoring and a low‑cost outage notification device “Denkinaizo®” that emails stakeholders instantly on power loss. Monitoring camera · Denkinaizo.

Software Development & Data

Python‑centric apps, IoT/control, and AI solutions; data analysis support and 3D presentation assets. Software development · Renewables + IoT.

About the Solar‑PV Requirement in Gunma Prefecture

We build high‑safety, high‑performance PV systems—particularly strong with SolarEdge safeDC™ that reduces module‑level DC to 1V when not in normal operation, greatly lowering fire and shock risk. We propose optimal plans and provide solid after‑care.

  • Explanatory obligation by architects to owners for buildings with total floor area ≥ 10 m²
  • Installation obligation for buildings with total floor area ≥ 2,000 m²

Related: Solar Journal · SolarEdge · I‑S3 Website

I‑S3’s Q&A

How will solar PV and EVs change society?

Solar PV is a key to sustainable living. Batteries make that possible in daily life, and the most familiar, fast‑spreading battery is the EV. PV is already widespread thanks to low cost and easy installation almost anywhere, making it a resilient distributed source that taps virtually limitless solar energy. Yet we still need electricity at night and in bad weather, so storage is essential. With enough batteries, self‑sufficiency on renewables alone is no dream. EVs accelerate battery uptake close to home. Through the spread of PV and EVs, we contribute to a sustainable society.

Why self‑consumption solar now?

Local generation for local use is rising, and PV is the most installable and cost‑effective distributed source. Resource prices have surged, lifting electricity costs for households and businesses. Announced utility price hikes—30–40% in some regions—magnify the burden. The root issue is reliance on imported fuels that are volatile and unpredictable. Reducing overseas dependence and shifting toward renewable, locally‑produced energy such as solar PV is the only sustainable path.

Contact

I‑S3 Co., Ltd.
638‑3, Mine, Annaka‑shi, Gunma 379‑0136 (Head Office)
Takasaki Office: 1311‑1 Iizuka‑machi, Takasaki‑shi, Gunma 370‑0831

TEL: 027‑384‑4646   /   Email: s_masuda@i-s3.com

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