Illustrative equipment photography, not this model.
Seplos battery
A case and BMS kit that the builder fills with cells, which is why the published figures describe the BMS rather than a finished product. Capacity here assumes 280Ah cells.
Published figures
Usable capacity
14.34 kWh
Capacity
280 Ah
Voltage window
44.8 to 58.4 V
Max charge current
200 A
Max discharge current
200 A
Comms
CAN, RS485
Form factor
DIY kit
Units in parallel
15
Source status: Provisional figure Typical street price $1,200 to $1,900 without cells. Charge and discharge limits are per unit. Wiring packs in parallel raises both.
How many you need, by inverter
One pack accepts 200 amps. An inverter that can deliver more than that needs more than one, or the charge rate capped in settings. Both are valid, and the second one costs you charging speed on the short days when you need it most.
No document tracked here names a specific inverter for closed-loop operation with this pack. That does not mean it will not work. It means nobody has published the test.
Where the figures come from
Manufacturer documents: Seplos BMS and kit documentation. 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 Seplos Mason 280 48V
Listings for the Seplos Mason 280 48V plus the rack hardware and cabling a clean install needs.
Affiliate 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 Seplos Mason 280 48V packs do I need?
One pack accepts 200 amps and holds 14.34 kWh. Match the pack count to your inverter’s charge current first, then check the energy. A Sol-Ark 15K at 275 amps would take 2 of them to charge at full rate.
Does the Seplos Mason 280 48V do closed loop communication?
It publishes CAN, RS485. No document tracked here names a specific inverter, so any closed-loop claim needs confirming with both manufacturers before you rely on it.
How many can I wire in parallel?
The published limit is 15 units.
Which inverters pair cleanly with the Seplos Mason 280 48V?
None of the inverters tracked here clear all four checks with this pack. Most land on unverified because nobody has published the comms or surge figure, which is a gap rather than a fault.
