One of the low cost 6.5kW units that fills the gap under the EG4 line. Single phase output and RS485 only, so expect an open loop system with hand set limits.
Published figures
- Continuous output
- 6,500 W
- Surge output
- 13,000 W
- Battery voltage window
- 40 to 60 V
- Max charge current
- 120 A
- Battery comms
- RS485
- Output
- 120 V single phase
- Grid interactive
- No, off grid only
- PV input
- 8,000 W, 500 Voc max
What this inverter will and will not do
- It will not export to the grid or run as a grid interactive hybrid. It charges from PV or AC and runs loads from the battery. If your plan involves net metering, this is the wrong unit.
- Output is single phase 120 V. A well pump, an electric dryer, or anything else expecting 240 V needs an autotransformer or a different inverter.
- Battery communication runs over RS485, and closed loop still depends on both sides agreeing on a message format rather than only on a bus standard.
Sizing a battery bank for it
This inverter delivers up to 120 amps of charge current, and that figure, not your daily energy use, sets the minimum pack count. Every battery below is shown at the smallest bank that can absorb the full charge rate.
| Battery | Packs needed | Bank capacity | Voltage window | Charge accepted | Comms | Result |
|---|---|---|---|---|---|---|
| Discover AES 48-6650 | 1 | 6.7 kWh | 42.0 to 57.6 V | 130 A | CAN, Modbus | Conflict |
| Discover AES 42-48-6650 | 1 | 6.7 kWh | 42.0 to 57.6 V | 130 A | CAN, Modbus | Conflict |
| Pylontech US3000C | 2 | 7.1 kWh | 44.5 to 54.0 V | 148 A | CAN, RS485 | Conflict |
| Dyness B4850 | 3 | 7.2 kWh | 44.0 to 54.0 V | 150 A | CAN, RS485 | Unverified |
| SimpliPhi PHI 3.8 | 2 | 7.6 kWh | 44.0 to 57.6 V | 150 A | none | Unverified |
| Growatt ARK 2.5H | 3 | 7.7 kWh | 44.0 to 57.6 V | 150 A | CAN, RS485 | Unverified |
| BYD Battery-Box Premium LVS 8.0 | 1 | 8.0 kWh | 40.0 to 57.6 V | 250 A | CAN | Conflict |
| HomeGrid Stack’d 48V 9.6kWh | 1 | 9.6 kWh | 44.8 to 58.4 V | 150 A | CAN, RS485 | Unverified |
| Pylontech US5000 | 2 | 9.6 kWh | 44.5 to 54.0 V | 200 A | CAN, RS485 | Unverified |
| Freedom Won eTower 5 | 2 | 10.0 kWh | 44.0 to 57.6 V | 200 A | CAN | Conflict |
| EG4 LifePower4 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| EG4 LL-S 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| SOK 48V 100Ah Server Rack | 2 | 10.2 kWh | 46.4 to 56.0 V | 200 A | CAN, RS485 | Unverified |
| Pytes E-BOX 48100R | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Jakiper JK48V100 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Vatrer 48V 100Ah | 2 | 10.2 kWh | 40.0 to 58.4 V | 200 A | RS485 | Unverified |
| Ruixu 48V 100Ah Server Rack | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| EG4 LifePower4 V2 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Pytes V5 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Pytes R-BOX 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| SOK 48V 200Ah | 1 | 10.2 kWh | 46.4 to 56.0 V | 200 A | CAN, RS485 | Unverified |
| Jakiper JK48V200 48V 200Ah | 1 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| LiTime 48V 50Ah | 4 | 10.2 kWh | 40.0 to 58.4 V | 100 A | none | Conflict |
| Vatrer 48V 200Ah | 1 | 10.2 kWh | 40.0 to 58.4 V | 200 A | RS485 | Unverified |
| Ruixu Lithi-2 48V 200Ah | 1 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Trophy Battery 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| SunGold 48V 100Ah Rack | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Growatt ARK XH 5.1 | 2 | 10.2 kWh | 44.0 to 57.6 V | 200 A | CAN, RS485 | Unverified |
| Rich Solar 48V 100Ah | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | RS485 | Unverified |
| Basen 48V 200Ah | 1 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Gobel Power GP-SR1-48100 | 2 | 10.2 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Victron Lithium Smart 48V 200Ah | 1 | 10.2 kWh | 40.0 to 57.6 V | 200 A | CAN | Conflict |
| Fortress eFlex 5.4kWh | 2 | 10.8 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| EG4 PowerPro WallMount 48V 280Ah | 1 | 14.3 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| EG4 WallMount Indoor 48V 280Ah | 1 | 14.3 kWh | 44.8 to 58.4 V | 150 A | CAN, RS485 | Unverified |
| Seplos Mason 280 48V | 1 | 14.3 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| LiTime 48V 100Ah | 3 | 15.4 kWh | 40.0 to 58.4 V | 150 A | none | Unverified |
| BigBattery Owl 48V | 3 | 15.4 kWh | 44.8 to 58.4 V | 150 A | none | Unverified |
| BigBattery Etheron 48V 15kWh | 1 | 15.4 kWh | 44.8 to 58.4 V | 150 A | CAN, RS485 | Unverified |
| CHINS 48V 100Ah | 3 | 15.4 kWh | 40.0 to 58.4 V | 150 A | none | Unverified |
| Redodo 48V 100Ah | 3 | 15.4 kWh | 40.0 to 58.4 V | 150 A | none | Unverified |
| Power Queen 48V 100Ah | 3 | 15.4 kWh | 40.0 to 58.4 V | 150 A | none | Unverified |
| ECO-WORTHY 48V 100Ah | 3 | 15.4 kWh | 40.0 to 58.4 V | 150 A | none | Unverified |
| Fortress eVault Max 18.5kWh | 1 | 18.5 kWh | 44.8 to 58.4 V | 133 A | CAN, RS485 | Conflict |
| HomeGrid Stack’d 48V 19.2kWh | 1 | 19.2 kWh | 44.8 to 58.4 V | 300 A | CAN, RS485 | Unverified |
| Dyness PowerBox 48V | 2 | 19.2 kWh | 44.0 to 54.0 V | 200 A | CAN, RS485 | Unverified |
| LiTime 48V 200Ah | 2 | 20.5 kWh | 40.0 to 58.4 V | 200 A | none | Unverified |
| BigBattery Rhino 2 48V | 2 | 28.6 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Fortress eVault 18.5kWh | 2 | 37.0 kWh | 44.8 to 58.4 V | 200 A | CAN, RS485 | Unverified |
| Rolls S-480 48V AGM | 2 | 41.2 kWh | 42.0 to 58.0 V | 170 A | none | Unverified |
Fuse and cable for the battery run
Running flat out this inverter pulls about 135 amps at 48 volts, and a surge takes it to roughly 271 amps. Size the protection for the peak, not the average: a 175 amp Class T fuse at the battery positive terminal and 2/0 AWG cable on the battery run. Class T rather than a standard fuse because a 48 volt lithium bank can deliver enough short circuit current to arc across a fuse that lacks the interrupt rating. Confirm the sizing against your installation manual, which accounts for run length and ambient temperature.
Communication
No manufacturer document tracked here names a specific battery for closed-loop operation with this inverter.
Where the figures come from
Manufacturer documents: Signature Solar product listings. Figures here should be read against the revision that covers your serial number, because manufacturers revise specifications without changing the model name.
Where to buy the Signature Solar 6500EX-48
Current listings and prices for the Signature Solar 6500EX-48 and the parts most builds need alongside it.
Check price on AmazonBattery cable and lugsClass T fuse and holderAffiliate links. As an Amazon Associate this site earns from qualifying purchases, at no extra cost to you. Prices and stock change often, and a listing appearing here is not a statement that the pairing above is approved.
Questions people actually ask
How many batteries does the Signature Solar 6500EX-48 need?
Enough packs to accept 120 amps of charge current. With a 100 amp rack battery that is 2 of them. Fewer will run the system perfectly well with the charge rate capped in settings, and capping it costs you charging speed on short winter days.
What size fuse and cable does the Signature Solar 6500EX-48 need?
It draws about 135 amps continuously at 48 volts and roughly 271 amps during a surge. That points at a 175 amp Class T fuse and 2/0 AWG cable for the battery run, sized for the fuse rather than the average load. Confirm against the figure in your installation manual, which accounts for run length and ambient temperature.
Which batteries have a documented pairing with the Signature Solar 6500EX-48?
None of the batteries tracked here have a manufacturer document naming this inverter for closed-loop operation. That is a documentation gap, not a verdict on the hardware.
Can the Signature Solar 6500EX-48 run a well pump?
It surges to 13,000 watts, about 271 amps from the battery. Whether the pump starts depends on the pack as much as the inverter, because the BMS is what interrupts a surge it is not rated for. The pairing pages check that figure per battery. A bank of 2 EG4 LifePower4 48V 100Ah is the smallest configuration on this site with a published surge rating that covers it.