The value of home energy storage is not worth installing, which is a problem that many users struggle. The answer depends on a core variable: Peak-valley price difference.

At present, many provinces across the country have implemented a time-of-use electricity price policy with large peak-valley price difference. In some areas, the peak-Valley electricity price difference exceeds 0.6 to 0.8 yuan per degree.. Take a set of 10kWh household energy storage system as an example, complete a complete charge and discharge cycle every day during the deep valley period. Theoretically, it can save about 6 to 8 yuan per day, and about 2200 to 2900 yuan per year..

But between "theoretical value" and "real value", there is a whole set of system design effort.

the efficiency of peak-Valley arbitrage depends on several key design choices. Cell the cycle life of the system determines the service life of the system-the cycle life of mainstream household energy storage systems is between 2000 and 6000 times, and the corresponding service life is about 6 to 15 years.. Taking the lithium iron phosphate battery system as an example, under the condition of 600 cycles per year (one charge per day), the levelling electricity cost (LCOS) of the energy storage system has been reduced to about 0.389 yuan/kWh.. If the system is charged at 0.3 yuan/kWh during Valley and discharged at 0.8 yuan/kWh during peak, the price difference space exists.

The charge and discharge strategy of BMS is also critical. Household energy storage batteries need to find a balance between participating in peak-Valley arbitrage and ensuring battery life-shallow charge and shallow discharge (SOC 20% to 80%) can significantly prolong battery life, however, the available capacity of a single cycle is affected. A well-designed BMS strategy can automatically adjust the charging and discharging depth according to the electricity price period, maximizing arbitrage income without sacrificing battery life.

Dongguan Juneng New Energy Technology Co., Ltd. has accumulated practical project experience in the customization of portable home energy storage system. The company's 1000W portable home energy storage system for European market supports 110V/220V dual voltage pure sine wave output, maximum power 1000W, weight controlAt 9.5Kg, the size is 340 × 272 × 198mm. In terms of the design of the BMS, the energy gathering new energy connects the BMS of the energy storage battery with EMS, participates in the overall energy scheduling, and ensures that the system can automatically implement the optimal charging and discharging strategy in different electricity price periods.

From the perspective of policy, one change that needs attention is: since September 1, 2026, lithium ion battery the consumption tax is officially levied at 2% tax rate, and the tax rate will rise further to 4% from September 1, 2027.. The general prediction in the industry is that the tax cost will be transmitted along the industrial chain, and the purchase cost of household energy storage system will rise slightly.. For users who are considering installing household energy storage, the current policy window is worth grasping.

Contact Information:
dongguan Juneng New Energy Technology Co., Ltd.
Contact: Gao Yan 137-5142-6524
email address: susiegao@power-ing.com
address: xinghuiyuan high-tech industrial park, Dalang town, Dongguan city, Guangdong province