Growatt 12kW Split Phase Off-Grid Inverter | SPF 12000T DVM-US | UL 1741
⚠ Before You Buy
This is an off-grid inverter — it cannot export to or draw from the utility grid. It is not suitable for grid-tied homes without significant rewiring. Confirm your application before ordering.
Running a full off-grid home on 120V-only power means half your appliances won't work — no standard electric range, no well pump, no central HVAC, no 240V EV charger. The SPF 12000T DVM-US solves that with true 48V split-phase 120/240V output, which means your off-grid home runs on the same electrical standard as every other house in America. Your panel, your appliances, your electrician's wiring knowledge — all compatible.
At 12kW continuous output, it handles the full load profile of a serious off-grid homestead: well pump startup surge, HVAC, workshop tools, kitchen appliances, and EV charging running simultaneously without browning out. Dual MPPT trackers let you optimize two separate string configurations independently — useful on properties with panels on multiple structures or orientations.
Generator input is built in, which matters for off-grid winter months when solar production drops and battery reserves need backup charging. This is a purpose-built off-grid unit — not a hybrid, not grid-interactive. If you're designing a full off-grid homestead and want to size the battery bank and solar array correctly, use our Build Your System guide before ordering.
| Continuous Output Power | 12,000W |
| Output Voltage | 48V split-phase 120/240V |
| MPPT Trackers | Dual (independent) |
| Output Waveform | Pure sine wave |
| Generator Input | Yes |
| Inverter Type | Off-grid only |
| Certifications | UL 1741 |
| Model | SPF 12000T DVM-US |
What's Included:
- Growatt SPF 12000T DVM-US off-grid inverter unit
- Mounting hardware
- Communication cables
- Installation manual
What You'll Need (not included):
- 48V battery bank (lithium or lead-acid, appropriately sized)
- Solar panels sized to your load and dual MPPT inputs
- Licensed solar/electrical installer
- DC disconnect, wiring, fusing, and overcurrent protection
- Generator (optional, for backup charging)
Shipping: Free standard shipping to all 48 continental U.S. states. Ships LTL freight — inspect all units before signing delivery receipts. Typical transit 5–10 business days.
Returns: 30-day return window from delivery date. Unit must be unused and in original packaging. Contact support@chargeprodirect.com to initiate a return. Return shipping costs may apply for non-defective units.
Warranty: Covered by Growatt's manufacturer warranty. CPD facilitates the warranty process.
Why do I need split-phase 120/240V for an off-grid home?
Most US homes are wired for split-phase 120/240V service. Large appliances — electric ranges, dryers, well pumps, central HVAC, EV chargers — require 240V. A 120V-only off-grid inverter means those appliances simply won't run. The SPF 12000T's split-phase output lets your off-grid home use standard US wiring and appliances without modification.
How large a battery bank does a 12kW off-grid inverter need?
It depends on your daily load and how many hours of autonomy you want. A rough starting point: if your home uses 30–40kWh per day and you want 1–2 days of autonomy, you need 30–80kWh of usable battery capacity. Use our Build Your System guide to calculate your specific requirements.
Can this be used with a generator as the primary backup?
Yes — the built-in generator input allows the inverter to accept AC power from a generator to charge batteries and power loads when solar production is insufficient. This is a common off-grid configuration for winter months or extended cloudy periods.
Is this suitable for a new off-grid construction or a cabin retrofit?
Both. New off-grid construction can be wired around the split-phase output from the start. Existing cabins with 120V wiring can run on one leg of the split-phase output while 240V circuits are added as needed.
Building or expanding a backup system?
Use our Build Your System guide to size your inverter, battery bank, and solar array before you order.
Build Your System →Shipping information
Free standard shipping on all orders to the contiguous 48 United States. Standard orders ship within 1–3 business days and arrive within 5–10 business days.
Large freight items (commercial chargers, battery systems, heavy equipment) ship within 7–14 business days. You will be contacted to schedule freight delivery.
Tracking information is provided via email once your order ships. We do not currently ship to Alaska or Hawaii.
Returns & warranty
We accept returns within 30 days of delivery. Items must be unused and in original packaging. A 25% restocking fee applies to all returns.
Inspect your order upon delivery. Report standard shipping damage within 48 hours and freight damage within 24 hours with photos to support@chargeprodirect.com.
Manufacturer warranties apply to all products — coverage varies by brand. Contact us at support@chargeprodirect.com or (781) 604-8685 to initiate a return or warranty claim.
