# Solarlog

Last updated: 2026-09-02

> Solarlog is the solar power plant diagnosis and management service by Conalog. It diagnoses plants at the resolution of a single panel (MLPE) to pinpoint the exact cause of generation loss, then raises output through Solarlog O&M — its AI-powered subscription O&M service — and proves the result with a generation guarantee. The core idea: surface, at the panel level, the problems that inverter-level data alone can never reveal.

Website: https://www.solarlog.kr
Operated by: Conalog — https://www.conalog.com
Contact: contact@conalog.com
Korean version of this document: https://www.solarlog.kr/llms-ko.txt
Full version (with the complete FAQ): https://www.solarlog.kr/llms-full.txt
Full version (with the complete FAQ): https://www.solarlog.kr/llms-full.txt
Full version (with the complete FAQ): https://www.solarlog.kr/llms-full.txt

## What We Do

Solarlog protects a solar plant's revenue along two axes.

- **Diagnosis:** We analyze panel-level (MLPE) data to isolate the cause of generation loss — shading, soiling, degradation, faults — down to a single panel. Losses that get buried in the average of inverter-level monitoring are surfaced, and a diagnostic report shows exactly where and how to recover output.
- **Solarlog O&M (subscription O&M):** We sustain the output gained from diagnosis with AI-powered continuous monitoring. Panel-level data is analyzed 24/7 to catch performance drops early, and a plant-specific guarantee line is set so generation is guaranteed by results.

## The Problem

Solar plants age every year. Panel shading, soiling, degradation, and faults slowly erode output, yet inverter-level monitoring hides these losses in the average across many panels. Owners are left unable to pinpoint why output is falling, and revenue loss goes unaddressed. Solarlog raises diagnostic resolution to a single panel and eliminates this blind spot.

## How It Works

- **Existing plants:** Diagnosis → problem resolution → guarantee baseline → subscription O&M. Operating plants are first diagnosed to find and fix the source of loss, then moved into guarantee and management.
- **New plants:** Guarantee baseline → subscription O&M. New builds skip diagnosis/resolution and enter directly at the guarantee-baseline stage.
- **Solarlog O&M plans:** One entry plan plus three cumulative upgrade tiers, and a separate enterprise tier. 기본형 (Standard, entry — panel-level Digital O&M, real-time anomaly detection, regular reports, MLPE hardware + installation included, with a 3-month diagnosis rider; ₩35,000 per 100 kW/month regardless of plant size) → 개선형 (Boost — +5–15% generation via MLPE BSTR shading recovery) → 관리형 (Care — adds on-site light maintenance, ~30% lower operating cost) → 보증형 (Guarantee — adds a data-based generation guarantee on PR and uptime). 기업형 (Enterprise) is custom-designed for curtailment, VPP/enterprise API and large complexes, quoted individually. Upgrade-tier pricing is published per 100 kW/month in two capacity bands (under 300 kW / over 300 kW): 개선형 (Boost) ₩59,000/₩49,000, 관리형 (Care) ₩74,000/₩64,000, 보증형 (Guarantee) ₩89,000/₩79,000.

## Core Concepts

- **MLPE (Module-Level Power Electronics):** Devices such as optimizers and microinverters that operate and measure at the level of a single panel — the foundation for panel-level data collection and precise diagnosis.
- **Panel-level Diagnosis:** Diagnosing a plant at single-panel resolution rather than at the inverter or string level, so the cause and location of loss can be pinpointed exactly.
- **AI O&M:** A digital Operation & Maintenance approach in which AI continuously analyzes panel-level data to detect performance drops and anomalies early and support operations.
- **Solarlog O&M (subscription O&M):** Plant operation and maintenance delivered as a subscription, including continuous monitoring, output improvement, and a generation guarantee.
- **Generation Guarantee:** Setting a plant-specific guarantee line and guaranteeing generation by results.
- **RSD (Rapid Shutdown):** Rapidly cutting voltage at the panel level during fire or inspection to ensure safety.

## Key Facts

- **Generation improvement:** Plants average more than 8% higher generation after adopting MLPE; in heavily shaded environments, improvements of around 15% are achievable.
- **RSD (Rapid Shutdown):** Cuts panel voltage to 0V within 30 seconds during a fire or other emergency. Mandated in the US (NEC 2023), with adoption planned in Korea. Solarlog's MLPE ships with RSD built in, and there have been zero fire incidents since deployment.
- **Operations track record:** Panel-level remote diagnosis has detected and resolved more than 500 risks per year without site visits.
- **O&M cost reduction:** Roughly 50% lower operations-and-maintenance cost versus the conventional approach.
- **AI diagnosis cost:** AI-based diagnosis costs about 95% less than conventional on-site (site-visit) diagnosis.
- **Public procurement:** Solarlog's MLPE solution is designated a Korea Public Procurement Service (PPS) innovation product, enabling private contracts with public institutions.
- **Market position:** Solarlog is the No.1 domestic (Korean) MLPE manufacturer and adopter.
- **Global deployment (as of 2026-06):** 5 countries, 397 plants, 80.1 MW total capacity, 90,845 panels. (Figures shown are the site's fallback values; live figures may differ.)

## Frequently Asked Questions

9 topics, 48 questions published on the home page at https://www.solarlog.kr#faq — each answer is deep-linkable at #sfaq-qNN. Full text: https://www.solarlog.kr/llms-full.txt

- **01. Plan Guide** (3) — How are the plans structured? / What is included in the monthly subscription fee? / Is there a guideline for which plan to choose?
- **02. Starting with Standard and Upgrading** (8) — What kind of plan is Standard? Do I have to start with Standard? / Can I start directly with Guarantee (a higher tier) without going through Standard? / What does the diagnostic report contain, and how far can it be used? / What is the procedure for upgrading from Standard to a higher plan? / How does the cost change when I upgrade? / After upgrading, can I change to another tier again? / May I keep using Standard without upgrading? / What happens if I only take the diagnosis on Standard and then terminate?
- **03. Output Guarantee** (2) — If I choose Guarantee, how is the guarantee baseline (PR coefficient) set? / How is the irradiance that forms the basis of the PR calculation measured? What changes if a pyranometer is installed?
- **04. Installation & Construction** (5) — Is installation possible even at sites with difficult access, such as rooftop installations? / Are there conditions where installation is difficult or impossible? / Is there anything you need to prepare before installation? / How long does installation take, and does generation stop during that time? / What happens if an accident occurs during installation or existing equipment is damaged?
- **05. Monitoring and Fault Response** (7) — Do monitoring and fault alerts also work on weekends and public holidays? / When an anomaly is detected, who is notified and how? / How far can matters be handled remotely on weekends? / If a problem cannot be solved remotely and on-site work is required, what is the procedure? / Are there extra charges for night-time or holiday site dispatch? / How often are regular site inspections and thermographic (IR) inspections carried out? / What is included in the report I receive every month?
- **06. Repairs and A/S Scope** (5) — How much of root-cause investigation and actual repair is included in the subscription fee? / If the combiner box, inverter, or distribution panel fails rather than the solar modules, will you identify the cause as well? / What do you do when it is unclear which piece of equipment is to blame for a fault? / Will you also file and coordinate manufacturer A/S for equipment that Solarlog did not supply? / What happens if the manufacturer's warranty on existing equipment such as the inverter has already expired?
- **07. Contract Term and Payment** (6) — Why a 10-year contract term? What are the advantages from the customer's point of view? / Is a 20-year contract term also possible? How does it differ from 10 years? / When do the service start date and billing begin? / Will the subscription fee be raised during the contract term? / If I expand or reduce the plant during operation, what happens to the contract? / What obligations does the customer have during the contract term?
- **08. Termination, Sale, and Maturity** (3) — How is the early termination fee calculated? / Is there any disadvantage if I sell the plant? / What happens when the contract term ends? Do you take the equipment back?
- **09. Technology & adoption** (9) — What is MLPE? / What is RSD (Rapid Shutdown)? / How much does generation improve? / Can it be installed on existing plants? / How much are maintenance costs reduced? / Is it available for public institutions? / What are the Solarlog service categories? / What effect does a solar power optimizer have? / How are operating rate and maintenance time improved?

## Key Pages

- Home: https://www.solarlog.kr
- Plant Diagnosis: https://www.solarlog.kr/service/diagnosis
- Solarlog O&M: https://www.solarlog.kr/service/om

## Languages

Korean (default), English (/en), Japanese (/ja), Vietnamese (/vi), Indonesian (/id)