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Orders shipped from the EU warehouse: Free shipping is available to mainland EU countries (excluding remote islands).
Orders shipped from China: Free shipping is available to the EU, US, and other major regions (excluding remote islands).
Note: If your shipping address is in the UK, Switzerland, or Norway, and your order is shipped from our European warehouse, additional shipping fees will apply. Any customs duties or taxes incurred for these destinations must also be covered by the customer.
After you place an order, we will process it within 1-2 business days. Depending on your shipping address, we will ship from the nearest warehouse so you can receive your items as soon as possible.
Contact us at service@better-ess.com to check the stock level of your nearest warehouse.
We stand behind the quality and performance of our products through comprehensive warranty coverage.
All LiFePO4 Cells Batteries can receive a 5-year warranty, when used correctly according to the product manual instructions.
Mobile ESS and DIY Case Kit are also warranted for 5 years.
Battery chargers carry a 2-year warranty.
Accessories are covered by a 1-year warranty.
All warranties are effective from the date of purchase by the end user. Correct installation and usage as specified in the product manual are required to maintain warranty eligibility.
Please take time to carefully review the manual prior to setup and operation to ensure proper use and long-lasting performance from your BetterESS LiFePO4 System. We're here to support you throughout the warranty periods.
We provide lifetime customer support to ensure you enjoy a worry-free experience with our products.
Whether you have questions about installation, usage, or maintenance, our dedicated team is always here to help — anytime you need us.
Contact us (Email): service@better-ess.com
Our current price is the final price, free shipping and tax, you don't need to pay any other fees.
This model will be shipped from China, about 45-60 working days after shipment!
【Energy Expansion】: BetterEss 48V 51.2V 20kWh All-in-one battery built-in 20KW three phase inverter, it can connect all in one battery of the same model to parallel, and it can also connect 30KWH battery (TW-MB51600-300A-HWB) to expand capacity.
【Usage】: BetterEss 20kWh All-in-one lifepo4 lithium battery offers outstanding safety, high energy density, long life, excellent temperature performance, and eco-friendly power generation. Perfect for solar home systems, power outages, off-grid living.
【Feature】: BetterEss 20kWh All-in-one ESS with active balancer module and lifepo4 temperature-sensitive fire extinguisher; Battery and inverter integrated into one, easy to install, plug and play.
| MODEL | BE-AO-MB51600-AC380V-12KW-EU | BE-AO-MB51400-AC380V-12KW-EU | BE-AO-MB51300-AC380V-12KW-EU | ||
| BATTERY TECHNICAL SPECIFICATION | |||||
| Battery model | MB51600-300A-WIFI | MB51400-300A-WIFI | MB51300-300A-WIFI | ||
| Number of batteries | 1 | ||||
| Battery Energy | 30.72kWh | 20.48kWh | 15.36kWh | ||
| Battery Capacity | 600AH | 400AH | 300AH | ||
| Weight | 238KG | 215KG | 173KG | ||
| Dimension L×D×H(mm) | 750*500*845mm | 660*500*850mm | 660*470*704mm | ||
| Battery Type | LiFePO4 | ||||
| Battery Rated Voltage | 51.2V | ||||
| Battery Working Voltage Range | 44.8～57.6V | ||||
| Maximum Charging Current | 300A | ||||
| Maximum Discharging Current | 300A | ||||
| DOD | 80% | ||||
| Designed Life-span | >6000 Cycles @0.2C/25℃ Charging/Discharging at 80%DOD,Until 80%Capacity. | ||||
| INVERTER TECHNICAL SPECIFICATION | |||||
| Inverter model | SPI-12K-H3P | ||||
| PV CHARGE | |||||
| Solar Charge Type | MPPT*2 | ||||
| Maximum Input Power | 9000W/9000W | ||||
| PV Charging Current Range | 22A+22A | ||||
| PV Operating Voltage Range | 800Vdc/800Vdc | ||||
| MPPT Voltage Range | 200-650Vdc | ||||
| AC CHARGE | |||||
| Frequency Range | 50/60Hz | ||||
| Input Voltage Range | phase voltage 170~280V,line voltage 305~485V | ||||
| Bypass Overload Current | 35A | ||||
| AC OUTPUT | |||||
| Rated Output Power | 12000W | ||||
| Max.Peak Power | 24000W | ||||
| Rated OutputVoltage | 230/400Vac(three-phase) | ||||
| Load Capacity of Motors | 6HP | ||||
| Rated AC Frequency | 50/60Hz | ||||
| Waveform | Pure Sine Wave | ||||
| Switch Time | 10ms(typical) | ||||
| BATTERY INVERTER OUTPUT | |||||
| Rated Output Power | 12000W | ||||
| Maximum Peak Power | 24000W | ||||
| Power Factor | 1 | ||||
| Rated OutputVoltage (Vac) | 230/400Vac(three-phase) | ||||
| Frequency | 50Hz±0.3Hz/60Hz±0.3Hz | ||||
| Auto Switch Period | <15ms | ||||
| THD | <3% | ||||
| GENERAL DATA | |||||
| Protection Degree | IP20,Indoor Only | ||||
| Operating Temperature Range | -15~55℃,>45℃ derated | ||||
| Noise | <60dB | ||||
| Cooling Method | Internal Fan | ||||
| COMMUNICATION | |||||
| Embedded Interfaces | RS485/CAN/USB/Dry contact | ||||
| External Modules(Optional) | Wi-Fi/GPRS | ||||
I’ve noticed a significant improvement in energy efficiency after switching to these LiFePO4 batteries. Perfect for my solar power system.
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Battery capacity is very large, can reach more than 295ah, after 15 days of transport received the battery is very good, no damage, I am very satisfied
Einfach perfekter Service Von der Bestellung bis zur sehr pünktlichen Auslieferung perfekt. Fragen per Mail werden schnell und höflich beantwortet. Die Qualität der mir gelieferten Zellen ist mehr als gut, wenn noch der wirklich gute Preis berücksichtigt wird, beinahe unglaublich
Happy with purchase and would recommend. Unit arrived a month early (ordered end of march, expected start of june, showed up start of may) though i didn't know it was coming until fedex showed up at my door.
All ok. Equal voltage on all. Batteries are all flat, none of battery is swolen even 1mm.
Schnelle Lieferung, sehr gut verpackt, Kapazität aller Zellen entsprechen den Angaben der mitgelieferten Zertifikate, qualitativ hochwertige Anmutung
