Hongjiali New Energy(HG POWER) DC Bus Solar-Storage-Charging Integrated Solution in California

November 17, 2025

A comprehensive guide to California’s DC bus solar-storage-charging integrated solution. Learn about project design, system configuration, energy management, safety architecture, business models, and ROI analysis for EV charging infrastructure.

Market Background: Why Solar-Storage-Charging Is Rising Rapidly in California

California has become one of the world’s most dynamic markets for solar-plus-storage EV charging infrastructure. Several structural factors drive this trend:

High penetration of renewable energy leading to the “duck curve”
Frequent wildfire-related outages
Grid capacity constraints
EV adoption surging year by year
Strong government incentives (SGIP subsidies + federal ITC)
TOU (time-of-use) electricity pricing enabling energy arbitrage
Rapid decline in the cost of solar and battery storage

In such an environment, integrated solar-storage-charging hubs solve both energy and transportation challenges:

Maximize solar resource utilization
Reduce grid load and peak pressure
Improve charging reliability during outages
Lower carbon emissions
Enable local consumption of renewable energy
Unlock diversified business models

Project Overview: 600 kW Solar-Storage-Charging Hub in California

1. Site Profile

Location: California, USA
Construction Area: ~5,000 m²
Solar Canopy Area: 2,373 m²
Parking Spaces: 132 (10 EV fast-charging spaces)
Station Type: Grid-connected + off-grid hybrid (DC coupled)

2. System Configuration

Category	Specification
Solar PV	600 kW steel canopy-mounted system
Energy Storage + Charging	GCC1566K-800 × 2 sets
Battery Capacity	1566 kWh per set
DC Fast Charging	750 kW charging stack + 10 single-gun terminals
PV Input	500 kW DCDC per set
Grid Input	300 kW per set
Transformer	800 kVA dry-type

Technical Architecture: High-Efficiency DC Bus Solar-Storage-Charging Integration

The solution adopts a DC-coupled architecture, connecting PV, battery storage, and EV DC fast chargers directly to a centralized DC bus.

Key Benefits of DC Bus Architecture

Higher overall efficiency (≥ 88%)
Less energy conversion loss
Minimal grid impact
Perfect for TOU arbitrage
Smooth transition between grid-on and off-grid modes

Energy Flow Overview

PV → MPPT DCDC → DC Bus
Battery ↔ DC Bus (charge/discharge)
DC Bus → DCDC Charger → EV
Grid → Transformer → PCS → DC Bus (supplement mode only)

Smart Scheduling (EMS)

Solar priority → Storage → Grid fallback
< 100 ms response time
≤ 500 ms seamless islanding switch
Compliant with California grid standards
Real-time optimization based on irradiance, SOC, load & charging demand

Site Layout & Integrated Safety Protection

1. Integrated & Compact Site Design

Solar canopy provides power generation + shading + architectural aesthetics
All critical components housed in a container:
battery + PCS + DCDC + charging stack + DC bus
Easy operation & maintenance with isolated maintenance zones
No grid expansion needed; directly uses existing transformer capacity
Solar + storage + grid operate independently for high resilience

2. Multi-Layer Safety System

Overcurrent / overvoltage protection
Battery overcharge / over-discharge protection
Anti-islanding protection
Fuse-based short-circuit protection
PV overload protection (MPPT limiting)

Investment & Profitability Analysis (Reference Model)

1. Basic Assumptions

Annual Charging Energy: 1.26 million kWh
Charging Service Fee: 1.4 RMB/kWh
Average Electricity Price: 1.89 RMB/kWh
Solar Irradiation: 2,000 hours/year
Charger Utilization Rate: 10%
Project Duration: 10 years
Government Subsidy: 50% of CAPEX (reference)

Note: California’s additional local incentives, SGIP rebates, and TOU arbitrage income are not included in the base model—meaning real profits will be higher.

2. Revenue Streams

EV charging service income
Solar electricity production
Energy storage arbitrage (TOU peak–valley spread)
Load-side energy supply
Platform digital asset value
Federal & state incentives
Value-added services (ads, membership, parking occupation fees)

Conclusion: Solar-Storage-Charging Hubs Are the Future of California’s Energy Infrastructure

The California project showcases how DC bus solar-storage-charging systems deliver:

Higher efficiency
Greater reliability
Lower operational costs
Flexible grid interaction
Strong financial returns

As EV adoption accelerates and the grid becomes increasingly renewable-heavy, these integrated charging hubs will form the backbone of:

EV fast-charging ecosystems
Distributed energy networks
Virtual power plants (VPP)
Carbon-neutral smart cities

Ready to Build Your Solar-Storage-Charging Station ?

We offer complete turnkey services:

✓ Site assessment
✓ System design
✓ Equipment supply
✓ Installation & commissioning
✓ Operations & maintenance
✓ Incentives consulting (SGIP + ITC)

👉 WhatsApp：+86 18924678741

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WhatsApp：+86 18924678741

Hongjiali New Energy(HG POWER) DC Bus Solar-Storage-Charging Integrated Solution in California

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