| Max. output current charging (A): | 30.00 |
|---|---|
| Battery voltage: | High Voltage |
| Battery voltage: | High Voltage |
|---|
| Max. output current charging (A): | 25.00 |
|---|---|
| Battery voltage: | High Voltage |
| Battery voltage: | High Voltage |
|---|
| Max. output current charging (A): | 30.00 |
|---|---|
| Battery voltage: | High Voltage |
| Battery voltage: | High Voltage |
|---|
Solar Storage Systems
Solar storage systems are playing an increasingly central role in photovoltaic systems – especially in commercial applications. They optimize self-consumption of solar energy and enable new business models. PV batteries also support grid stability: during sunny periods with excess production, electricity can be stored and then used during periods of low or no solar input.
As a PV wholesaler, Krannich offers high-performance solar storage solutions from leading manufacturers for a wide variety of residential and commercial applications.
Types of Solar Storage Systems
- DC-Coupled Batteries: Connected directly before the inverter, no conversion losses.
- AC-Coupled Batteries: Installed after the inverter, popular for retrofitting.
- Storage + Inverter Combinations: Not all devices are compatible, so we offer pre-configured sets and a compatibility overview.
Commercial Storage Solutions
- Small Commercial Storage: Installed like residential batteries, scalable up to 200 kW via cascading.
- Large Commercial Storage: Cabinet/container systems, from 100 kW up to MW scale. Often require certifications or manufacturer installation services.
Applications of PV Battery Storage
- Self-Consumption Optimization: Increase self-consumption, lower electricity costs, reduce dependency.
- Dynamic Electricity Tariffs: Use battery during expensive tariff times, store during cheap ones. Commercial users can also trade energy.
- Further Commercial Use Cases: Backup power, peak shaving, operational self-sufficiency. ROI often within 10 years.
➔ Read more about commercial storage and use cases
How Does a Solar Battery Work?
A solar battery stores excess DC electricity as electrochemical energy. A BMS regulates charge/discharge, while the inverter converts stored power back to AC when needed.
Common Chemistries:
- LFP: High cycle stability, thermal safety, cobalt-free.
- NMC: Higher energy density, common in commercial storage & EVs.
- NCA: High performance, for demanding applications.
- LTO: Very fast charging, long cycle life, higher cost.
- Sodium-Ion: Emerging, resource availability & safety advantages.
When Is a Solar Battery Worth It?
Worthwhile when matched to system and usage:
- Residential: For self-consumption, EVs, heating, dynamic tariffs. ROI in 10–20 years.
- Commercial: Depends on load profile & contracts. Often pays back in <10 years.
Are There Subsidies for PV Batteries?
Feed-in tariffs remain the main federal incentive in Germany but discourage storage in ROI calculations. Other incentives:
- KfW renewable energy loan programs (covering storage systems)
- Regional/state/municipality programs
Which Is the Best Solar Battery?
Brands: BYD, Axitec, Huawei, Varta. Best choice depends on project needs, especially for commercial use. Our consultants assist with selection.
Efficiency rankings: HTW Berlin storage inspection 2024
How Long Does a Solar Battery Last?
Modern systems: 5,000–10,000 cycles (13–27 years at daily use). In Germany ~250 cycles/year typical, unless used daily with dynamic tariffs. A good BMS extends lifetime. Warranties: up to 10 years.