Should I buy this or the indoor model?
Electrically they are the same battery. This one has an IP67 sealed enclosure so it can mount on an exterior wall, under a carport or in an unconditioned outbuilding. The indoor model is IP20 and has to live in a garage, basement or utility room. If your install location is sheltered, the indoor version does the same job for less money.
How long will one battery actually run my house?
Depends entirely on your loads, so the honest answer is that we work it out with you. As a starting point, essentials only, meaning refrigeration, lights, internet, a well pump and a furnace blower, typically draws 8 to 14 kWh overnight, which one battery covers on its 12.86 kWh of usable capacity. Air conditioning or electric resistance heat changes that completely and usually points to two or three.
Will it survive a real winter outside?
That is what the heater is for. It draws 448W, switches on below 32°F and off at 37°F, so the pack keeps charging rather than sitting idle in the cold. Charging is rated from 32 to 122°F and discharging from −4 to 131°F.
Why does the price per battery drop as I add more?
Because our cost of getting them to you barely moves. Putting one 309 lb battery on a truck costs almost the same as putting two or three on the same pallet, so we pass that difference back rather than keep it. Shipping is free either way, but the per-battery price is genuinely lower at every step up to six.
Can I start with one and add more later?
Yes, and it is a supported path rather than a workaround. You will need a paralleling cable set and a conduit box for the added battery, plus a firmware check on the existing pack so the BMS units agree. Buying together is cheaper per kWh, so if you already know you want the capacity, order it now.
Will it work with my inverter?
It is built for 48V systems and communicates over RS485 and CAN, which covers the EG4 6000XP, 12kPV and 18kPV and most other 48V platforms. If you are on something less common, send us the model before you order and we will confirm rather than guess.
How many can I parallel?
Up to 32 units. Most residential systems land between one and six, which is why the quantity dropdown stops there. If you are planning something larger, call us and we will quote it directly.
Do you install it?
We supply and support rather than install. Most customers use their own electrician. We spec the system, provide the wiring guidance and stay on the phone through commissioning.
