{"id":43084,"date":"2026-09-08T12:00:35","date_gmt":"2026-09-08T10:00:35","guid":{"rendered":"https:\/\/fvcomponentes.com\/?p=43084"},"modified":"2026-09-08T12:00:35","modified_gmt":"2026-09-08T10:00:35","slug":"zyc-simpo-5000-vs-pylontech-us5000","status":"publish","type":"post","link":"https:\/\/fvcomponentes.com\/en\/zyc-simpo-5000-vs-pylontech-us5000\/","title":{"rendered":"ZYC SIMPO 5000 versus Pylontech US5000: what really changes in your installation"},"content":{"rendered":"

Pylontech has been the standard 48 V battery in Spain for years. It is found in half of the country\u2019s self-consumption installations with storage; all inverters come with it pre-configured, and the installer who fits it knows exactly what to expect. That is a real achievement and it is worth pointing out before making any comparisons.<\/p>\n\n\n

The question we\u2019re asked every week is a different one: When a new brand is added to the catalogue, what does the installer stand to gain or lose?<\/strong> We have incorporated the ZYC SIMPO 5000<\/a>, so let\u2019s put it next to the US5000 and look at the fact sheet, not the brochure.<\/p>\n\n\n

\"ZYC
ZYC SIMPO 5000 module: 5.12 kWh usable capacity in a 19-inch rack-mount format.<\/figcaption><\/figure>\n\n\n

The table, first of all<\/h2>\n\n\n
<\/td>ZYC SIMPO 5000<\/strong><\/td>Pylontech US5000<\/strong><\/td><\/tr>
Chemistry<\/td>LiFePO4<\/td>LiFePO4<\/td><\/tr>
Nominal energy<\/td>5,12 kWh<\/td>4.8 kWh<\/td><\/tr>
Useful energy<\/td>5.12 kWh (DoD 100 %)<\/td>~4.56 kWh (DoD 95 %)<\/td><\/tr>
Rated voltage<\/td>51,2 V<\/td>48 V<\/td><\/tr>
Voltage range<\/td>40.8 \u2013 58.08 V<\/td>45\u201354 V<\/td><\/tr>
Direct current (charging and discharging)<\/td>100 A<\/td>75 A nominal \/ 120 A (15 min)<\/td><\/tr>
Peak current<\/td>200 A (5 s)<\/td>200 A (15 s)<\/td><\/tr>
Charging temperature<\/strong><\/td>-10 \u00b0C to +55 \u00b0C<\/strong><\/td>0 \u00b0C to +50 \u00b0C<\/strong><\/td><\/tr>
Discharge temperature<\/td>-20 \u00b0C to +55 \u00b0C<\/td>-10 \u00b0C to +50 \u00b0C<\/td><\/tr>
Integrated protection<\/td>1P 125 A \/ 80 V DC switch on the module<\/td>External circuit breaker<\/td><\/tr>
Max. in parallel<\/td>80 modules (64 of which have several cupboards)<\/td>16 modules<\/td><\/tr>
Communication<\/td>CAN 2.0A \/ RS485 \/ no communication<\/td>CAN \/ RS485 \/ RS232<\/td><\/tr>
Format<\/td>19\u2033 rack \u00b7 482 \u00d7 134 \u00d7 518 mm<\/td>19\u2033 rack \u00b7 442 \u00d7 420 \u00d7 161 mm<\/td><\/tr>
Weight<\/td>44 kg<\/td>38 kg<\/td><\/tr>
Cell certification<\/td>UL1973, UL9540A, IEC 62619:2022, UN38.3<\/td>IEC 62619, UN38.3<\/td><\/tr>
Guarantee<\/td>10 years<\/td>10 years<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n

The four differences that really stand out<\/h2>\n\n\n

1. Load at -10 \u00b0C: the only one that changes the design<\/h3>\n\n\n

That is the fundamental difference. The US5000, like almost all LFPs of its generation, stops charging at temperatures below 0 \u00b0C<\/strong>: the BMS cuts off the power to protect the cells, and the system simply stands by whilst the sun generates power, unable to store it. The SIMPO 5000 can be charged down to -10 \u00b0C and discharged down to -20 \u00b0C.<\/p>\n\n\n

\n\nCHARGING temperature range<\/text>\n\nZYC SIMPO 5000<\/text>\n-10 \u00b0C to +55 \u00b0C<\/text>\n\nPylontech US5000<\/text>\n0 \u00b0C to +50 \u00b0C<\/text>\n\nZYC exclusive margin<\/text>\n\n-20\u00b0<\/text>-10\u00b0<\/text>0\u00b0<\/text>10\u00b0<\/text>20\u00b0<\/text>30\u00b0<\/text>40\u00b0<\/text>50\u00b0<\/text>60\u00b0<\/text>\nTechnical data from each manufacturer\u2019s data sheets \u00b7 fvcomponentes.com<\/text>\n<\/svg>
Below 0 \u00b0C, the US5000 stops accepting a charge; the SIMPO 5000 continues to charge down to -10 \u00b0C.<\/figcaption><\/figure>\n\n\n
\"Installation
Low-temperature chemistry is what makes it possible to continue charging in winter.<\/figcaption><\/figure>\n\n\n

In a garage in Cartagena, it doesn\u2019t matter. In a mountain refuge in the Pyrenees, an unheated warehouse in Teruel, a pumping station on the plateau or an isolated facility in Soria, it\u2019s the difference between having battery power in January or not. If your facility is in a heated indoor space, This feature doesn\u2019t offer you any benefit, and you shouldn\u2019t have to pay for it<\/strong>. If he\u2019s out, there\u2019s no debate.<\/p>\n\n\n

2. Useful energy: 5.12 versus 4.56 kWh<\/h3>\n\n\n

The SIMPO specifies 5.12 kWh of usable capacity at a depth of discharge (DoD) of 100 %. The US5000 specifies a nominal capacity of 4.8 kWh at a DoD of 95 %, which equates to approximately 4.56 kWh in practice. These are 560 Wh per module<\/strong>, another 12 %.<\/p>\n\n\n

In practical terms: a 6-module array increases from around 27.4 kWh to 30.7 kWh. In many cases, that is exactly the number of modules you save on, including their cabling, the space they take up and the margin.<\/p>\n\n\n

3. Direct current: 100 A compared with 75 A<\/h3>\n\n\n

SIMPO presents 100 continuous amps<\/strong> both during charging and discharging; the US5000, rated at 75 A with a margin of 120 A for 15 minutes. With a MultiPlus-II 48\/5000 or a Quattro operating at sustained load, you need fewer SIMPO modules to cover the same power output. You can find the details by inverter model at How many ZYC SIMPO 5000 batteries do I need, depending on my inverter?<\/a>.<\/p>\n\n\n

4. Scalability: 80 modules compared with 16<\/h3>\n\n\n

The difference here is one of category, not of degree. The US5000 supports up to 16 modules in parallel, providing around 73 kWh: more than enough for any home and just about sufficient for small-scale industry. The SIMPO supports up to 80 modules in parallel<\/strong> without external management devices, and 64 when several cabinets are combined. For residential use, this is irrelevant; for an industrial unit, an energy community or an agricultural project involving pumping, it means scaling up in phases without changing the architecture.<\/p>\n\n\n

A feature that installers appreciate: the switch is fitted inside<\/h2>\n\n\n

Each SIMPO module has its own 1-pole switch, 125 A and 80 V DC<\/strong> built into the front panel. It acts as the battery\u2019s ON\/OFF switch and protects it against overcurrent, short circuits, overvoltage and over-discharge. In practice, this means you don\u2019t need an external circuit breaker for each module, and the cabinet looks tidier. They are also hot-swappable<\/strong>: a unit is replaced without shutting down the system.<\/p>\n\n\n

Where Pylontech continues to excel<\/h2>\n\n\n

It would be dishonest not to say so.<\/p>\n\n\n