Sigineer 15kW 48v Inverter for Tesla Battery Modules – EVTV Motor Verks Store
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THE MOST POWERFUL 48Vdc INVERTER IN THE WORLD. Battery powered off-grid systems are quite popular and 48Vdc is the current voltage of preference. Unfortunately, most 48Vdc inverters are simply a poor match for Tesla Battery Modules. Why? The main problem is the Low Voltage Cutoff - the point of battery discharge where
THE MOST POWERFUL 48Vdc INVERTER IN THE WORLD. Battery powered off-grid systems are quite popular and 48Vdc is the current voltage of preference. Unfortunately, most 48Vdc inverters are simply a poor match for Tesla Battery Modules. Why?
The main problem is the Low Voltage Cutoff - the point of battery discharge where the inverter will shut down to protect the battery. Almost all 48Vdc inverters have LVCO in the 42-44V range with a very very few able to handle batteries down to 40V.
Two Tesla Battery Modules in series are pretty much discharged at 38V, but they are only 50% discharged at 43.2V. And so with almost all inverters on the market you are leaving 30-50% of your battery capacity on the table. That means you have to purchase TWICE the battery capacity that you would need if the inverter simply operated down to the 38V cutoff.
The other issue is that many of these inverters will also charge your batteries from AC - the charger is built in. That's great, but they are traditionally designed for lead acid batteries. They may support a bewildering array of Pb chemistry types, but ALL of the charge curves they provide are deadly to Tesla Battery Modules. We advocate charging with a simple bulk current to 50.5volts and NO MORE.
And of course most 48Vdc inverters provide 4KW to 8KW of power max. We have located an excellent quality 15 kilowatt inverter made in China that can do 45KW for 20 seconds. It charges at 110 Amperes from 240Vac. And we have commissioned them to provide a Low Voltage Cutoff of 38Vdc and a charge limit of 50.5Vdc - ideally tuned for the Tesla Battery Modules.
This inverter has two modes of operation that offer some very interesting flexibility.AC PRIORITY MODE. This allows you to pass a grid voltage THROUGH the inverter to your loads and operates primarily on grid power. It will automatically charge your battery and cycle it every 15 days. But on loss of grid AC input, it will transfer to battery operation within a few milliseconds. It is an ideal battery backup system.In BATTERY PRIORITY MODE, it does NOT pass through AC but rather generates all output power - up to 50 amps at 240vac continuously, from the battery. In the event the battery falls below the low voltage cutoff level, it will switch to the AC input and indeed recharge the battery at the same time. When the voltage reaches the resume level, in this case 47 volts, it will switch back to battery operation.Finally, it features a generator start output to start a generator if the source is a generator rather than the grid.BUT WAIT THERE'S MORE. We have found that this inverter can actually replace the grid waveform to operate grid-tied inverters such as the Solar Edge and the Enphase microinverters. This is what is used in 97% of the solar installations in the United States.Not only that, but any power produced by the solar inverters BEYOND your load needs, instead of going out to the grid goes into the batteries to RECHARGE them. The problem is having TOO MUCH SOLAR ENERGY (the kind of problem to have) and your batteries reaching fully charged. With this 15kW inverter, when used in conjunction with our new ESP32 Battery Module Controller, we can signal the inverter to shift the frequency of the output to 62.5 Hz momentarily. This causes the grid-tie inverters to shut down completely for five minutes.In this way, we can control the grid tied inverters to prevent overcharging the batteries.Finally, this inverter features an optional remote control panel. We INCLUDE that with every inverter instead of making it an option.
Inverter Output Specifications:
Continuous Output Power: 15,000 Watts
Surge Rating: 45000 Watts (20 Seconds)
Output Waveform: Pure Sine/Same as input (Bypass Mode)
100-110-120Vac / 220-230-240Vac
Nominal Efficiency: >88% (Peak)
Line Mode Efficiency: >95%
Output Frequency: 60Hz +/- 0.3Hz / 62.5Hz
Typical Transfer Time: 10ms (Max)
THD: < 10% DC
Input Specifications
Nominal Input Voltage: 48.0Vdc
Low Battery Alarm: 39.5.0Vdc
Low battery Trip: 38.75.0Vdc
High Voltage Alarm: 51.0Vdc
Low battery Voltage Restart: 47.0Vdc
Idle Consumption: 200 Watts
Power Saver Mode Idle Consumption: 50 Watts
Charger Specifications
Output voltage: Up to 50.5vdc
Charger Rate: 110A
Dimensions
• Unit Weight: 182 lbs/83KG • Unit Size L x W x H: 28 x 16.3 x 8 inches/706*415*212mm • Shipping Weight: 210 lbs/95KG • Shipping L x W x H:36 x 21.25 x 15.25 inches/900*540*410mm
Sigineer 15kW Inverter Manufacturer User Manual
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