Comparison BLUETTI AC200MAX vs EcoFlow DELTA Max 2000

Charging stations with UPS function switch consumers to backup power from their own battery, acting as an uninterruptible power supply. In comparison with full-fledged UPSs, switching does not occur instantly, but with a certain delay (about 10-30 ms). To use this function correctly, you must first study the instructions for the charging station, which often describes the correct procedure for connecting the intended consumer devices.

The delay (usually in milliseconds) between the power going out from the outlet and the moment when the station starts feeding connected devices from its battery, maintaining "pass-through" power. The shorter this time, the higher the chance that devices won't notice the drop at all: for routers, cameras, NAS, and PCs, this is critical because a long pause can cause a reboot, loss of connection, or even filesystem errors. Essentially, this is the same parameter as in a classic UPS, but for charging stations, it greatly depends on implementation: models with a more "UPS-like" switching scheme switch considerably faster, while some stations formally have a UPS mode but actually create a noticeable break or activate the output only after "realizing" the network's loss. In practice, this point helps distinguish a charging station that is truly suitable as a UPS for sensitive electronics from an option "for lights and charging": for example, for home internet and video surveillance, minimal switching time is important, while for lamps, charging phones, or a heater, a brief pause is typically not critical.

USB type C ports are smaller compared to classic USB ports and have a convenient reversible design that allows connecting the plug either way. USB type C was initially created to implement various advanced features: increased power, fast charging technologies, etc.

Since the port is relatively new and quite powerful (you can find USB type C with 60W, even 100W and 140W), the total number of such connectors is often limited to one port, or sometimes two).

— Current. The maximum current delivered through the USB type C port to the device being charged. Note that different ports of a charging station may deliver different currents (for example, 1.5A and 2.1A). In such cases, the highest current is usually specified.

— Power. The maximum power in watts (W) that the charging station can deliver to one charging gadget. The high output power of the USB type C port allows for faster charging. However, the device being charged must support the corresponding power; otherwise, the speed of the process will be limited by the gadget's specifications.

In wireless charging mode, energy is transferred to the gadget being charged through an inductive surface, which is usually built into the upper plane of the charging station case. There can be one slot for wireless charging or several of them are provided. The range of this technology does not exceed a few centimeters. However, this method of charging eliminates the fuss with wires and reduces wear on the connectors. One of the key disadvantages of this format is considered to be low power and, accordingly, slow charging speed.

Additional output connectors provided in the design of the charging station in addition to those described above.

DC connector for a distinctive round plug (like those used in many laptops) used to recharge the battery of the device. Note that DC- in plugs may have different sizes, and chargers with such plugs may have different operating voltages. In practice, this leads to the fact that finding a suitable charger for a portable station is not easy, you need to be especially careful when searching.

Power connector with two round connectors, used to replenish energy reserves in the battery cells of the charging station. For the most part, the input port of the XT60 is for charging the device from solar panels using the appropriate cable.

— Li-Ion. The key advantage of lithium-ion batteries is their high capacity with small dimensions and weight. Also, Li-Ion batteries are not subject to memory effect and can charge quite quickly. Of course, this option is not without its drawbacks - first of all, it is sensitivity to low or elevated temperatures, and if overloaded, the lithium-ion battery can catch fire or even explode. However, thanks to the use of built-in controllers, the likelihood of such “accidents” is extremely low and, in general, the advantages of this technology significantly outweigh the disadvantages.

— Li-Pol. An improved version of lithium-ion technology (see the corresponding paragraph): the liquid electrolyte in Li-Pol batteries is replaced with a solid polymer. At the same high capacity, the batteries have become more compact, there is practically no “memory effect” in them, and the likelihood of fires and explosions in the event of critical violations of operating conditions is minimized. The downside of these improvements was increased cost and increased sensitivity to frost. However, most often these shortcomings are not significant.

— LiFePO4. Lithium iron phosphate batteries are a modification of lithium ion batteries (see corresponding paragraph) designed to eliminate some of the shortcomings of the original technology. LiFePO4 batteries are characterized by a...large number of charge/discharge cycles, chemical and thermal stability, low temperature tolerance, short charging time (including high currents) and safety in operation. The likelihood of an “explosion” of a LiFePO4 battery when overloaded is reduced to almost zero, and in general, such batteries cope with high peak loads without problems and maintain the operating voltage almost until discharge.

— Li-Ion NMC. A type of lithium rechargeable battery using a complex alloy in the manufacture of the cathode. It contains nickel, manganese and cadmium. This “recipe” allows you to increase the power of a power source based on Li-Ion NMC elements. Batteries of this type have a high specific capacity and a stable discharge voltage, provide a long operating time of the charging station with high performance, are characterized by a complete absence of “memory effect”, maintain functionality over a wide temperature range and are fireproof.

— VRLA. Acid batteries with a regulating safety valve to release excess gas. The abbreviation VRLA stands for Valve Regulated Lead Acid. Batteries of this type have a sealed, non-separable design and come in two types: AGM VRLA (the battery plates are equipped with a layer of fiberglass absorbent) and GEL VRLA (with a gel electrolyte in a jelly-like state). Batteries with a control valve are resistant to deep discharges, do not require topping up with distillate throughout their entire service life, and do not emit hydrogen or oxygen.

- Semi-solid State. An advanced type of lithium-ion battery (see above), which combines some of the characteristics of liquid and solid batteries. It uses an electrolyte that is in a semi-soft or gel-like state, making the batteries more resistant to leakage than traditional wet batteries. Semi-solid state technology allows for a significant increase in the energy density of cells. As a result, it is possible to make compact batteries with high energy intensity.

Nominal battery capacity, in fact - the amount of energy that is supposed to be stored. The larger it is, the longer the battery life of the charging station will be, all other things being equal. On the other hand, this parameter also affects the dimensions, weight and price of the battery, despite the fact that an energy-intensive battery is not always required. By the indicator of capacity in watt-hours, you can compare batteries with each other.