For households that seek independent power supply and optimization of energy costs, the Kaimin S4 integrated off-grid solar inverter is a reliable and cost-effective solution. With a rated output power of 3.5kW/3.5kVA, this device can stably power all types of household appliances, meeting both daily electricity demands and emergency scenarios in case of power outages.
Its core advantage lies in the built-in maximum power point tracking (MPPT) controller, which can dynamically adjust the voltage and current parameters in real time, maximizing the power generation efficiency of the solar panel and effectively reducing the household's reliance on the power grid and electricity costs.
In terms of compatibility, the Kaimin S4 supports the flexible connection of lithium-ion batteries and lead-acid batteries. Users can choose according to their budget and usage requirements, and the system performance is not affected by the type of battery. At the same time, its input voltage ranges from 48V to 51.2V, and the output is a standard 220V power supply, which is suitable for the power supply environment and electrical equipment of mainstream households.
What is particularly noteworthy is that this device features an intuitive operation interface and a WiFi remote monitoring function (supporting BMS communication), enabling non-professionals to quickly complete deployment and daily management.
Whether it is for building a long-term independent household photovoltaic system or serving as an emergency power reserve, the Kaimin S4 is a cost-effective option for off-grid household power supply.

FAQ
Q1: Can I get some samples for test
A: Yes, sample order is available for quality check and market test
Q2: Do you accept OEM/ODM
A:Yes, we accept OEM/ODM with your authorization
Q3: How is delivery time
A: Generally it takes 5-10 days for regular type, for big quantity or OEM/ODM orders, please negotiate with sales
Q4: What is the standard of package
A: We have our own design carton with five layers corrugated material; if you have any other special requirement of package, we also support customized service
Q5: What’s your payment terms
A: We accept T/T, L/C, WEST UNION, ALI TRADE ASSURANCE, cash
Q6: What’s your warranty time
A: We offer 12 months warranty service, life time technique support
Q7: How does your factory do the quality control
A: Quality is our culture. We have strict quality control department to supervise each link from assembling to shipping. Products have to be subjected to at least seven strict quality inspection processes before being shipped out
Q8: How can I trust you
A: CKMINE established in 2005, has many years’ experience in producing inverters, we have passed ISO9001, ISO45001, ISO14001 management system and got CE, CCC, ROHS certificates. Assessment reports can be sent anytime if you require.