SunGold Power 6.5kW Off-Grid Solar Kit, 3.6kW Solar, 10.24kWh Battery | 120/240V | SGR-6510E
Estimated Delivery Between
and .
Order within to get it by the earliest date.
Free Shipping In The USA | Call Us: 877-556-3347
Free Shipping In The USA | Call Us: 877-556-3347
Found A Better Price?
Share it with us now and we will beat it. Get the best deal online, guaranteed!
Estimated Delivery Between
and .
Order within to get it by the earliest date.
Not Sure This Is The Right System?
Request a Free Solar ProposalA split-phase inverter is only half the answer. The other half is enough solar to actually use it, and that's where entry 240V kits come up short. This is the kit for a small off-grid home, a workshop, or a property on a well where 240V equipment runs regularly rather than occasionally: a 6,500W split-phase inverter, 10.24kWh of LiFePO4, and 3,600W of bifacial panels that put back 14 to 18kWh on a normal day, comfortably more than the battery holds.
6,500W is the ceiling, and big 240V loads use most of it. A 2-ton central AC and an electric water heater together draw more than this inverter delivers, so plan on running one large 240V load at a time. If several need to run at once, the 8kW and 10kW kits are the band to look at.

Three common load profiles, with how long this kit carries each one from a full battery and no sun. Most buyers here land in the household row, where the array replaces what the night used and then some.
| Setup | Continuous draw | Runs for |
| Essential. Refrigerator, LED lighting, Starlink or router, phone and laptop charging, a TV. | ~500W | ~17 hours |
| Household. All of the above plus a chest freezer, ceiling fans, a home office, a well pump cycling, microwave and power tool bursts. | ~1,500W | ~5 hours |
| Heavy. All of the above plus central AC or shop equipment running continuously. | ~3,500W | ~2 hours |
The 3.6kW array produces roughly 14 to 18kWh per day at 4 to 5 peak sun hours, and more where the panels can pick up reflected light from the back. That's meaningfully more than the battery delivers in a full discharge, which is the point: on a normal day this kit refills the bank and still has generation left for daytime loads.
Estimated runtimes below are from a full charge with no solar input, based on 8.7kWh delivered to AC loads. Real numbers depend on your specific appliances and how many run at once.
| Load | Draw | Runtime on battery alone |
| Chest freezer | ~100W avg | ~87 hours |
| Refrigerator | ~150W avg | ~58 hours |
| Cabin essentials | ~250W avg | ~34 hours |
| Lights, electronics, internet | ~300W | ~29 hours |
| Full household (essentials only) | ~800W avg | ~10 hours |
| Window AC unit | ~900W | ~9 hours |
| Microwave | 1,000W | ~8 hours cumulative |
| Power tools (intermittent) | ~1,200W | ~7 hours |
| Well pump (1HP) | ~1,200W running | ~7 hours |
| Central AC (2-ton) | ~3,000W | ~2 hours |
| Electric water heater | ~4,500W | ~1 hour |
Read the bottom three rows as capability, not as a daily plan. This kit will start and run a well pump, a 2-ton central AC, or an electric water heater, which is what split phase is for. A well pump is genuinely fine, because it runs in short bursts. Air conditioning or electric water heating all day needs more battery than this, whatever the inverter is rated for.

Split phase with an array that can keep up - 120V and 240V from one unit, no transformer and no second inverter, and 3,600W of panels behind it. That's the difference between a kit that can run 240V equipment and one that can run it regularly.
Bifacial N-type panels, 22.5% efficient - Dual-glass modules that generate from the back face as well as the front, at up to 80% of front-side output where light reflects onto them. Over gravel, concrete, a light roof or snow that's real extra production the 450W nameplate doesn't capture. N-type cells also avoid the light-induced degradation that affects conventional P-type panels, and carry a 30 year linear performance warranty rather than the usual 25.
13,000VA peak for motor starting - Pumps, compressors and welders draw far more starting than running. Double the continuous rating on tap is what gets them turning.
Charges from solar and a generator at once - Up to 140A combined, with 80A of that available from generator or shore power. A cloudy week doesn't leave you stranded.
Room to nearly triple the array - Two independent MPPT trackers accept 5,000W each. The kit ships 3,600W on one of them, so the second tracker is free for expansion.
Six units in parallel - Up to 39,000W of output if the site outgrows one inverter, without replacing what you already bought.

Every major system component, matched and ready to wire together.
Financing is available through Affirm. Select Affirm at checkout to see monthly payment options before you place the order.
How it ships. Kits ship freight on a pallet, which runs longer than the parcel deliveries in our shipping policy: typically 5 to 10 business days. Liftgate and pallet jack are included at no charge, so the driver gets it off the truck and onto the ground at your address. Eight bifacial panels at 53 lbs each is the bulk of the weight, and dual-glass modules are heavier and more brittle than standard panels, so plan on two people for handling them. We send tracking as soon as it leaves the warehouse, and the freight carrier will contact you directly to schedule a delivery window. Someone needs to be there to receive it. Inspect the shipment before you sign. Damaged in transit? We cover it.
Installation. Because this is an off-grid system with no utility interconnection, permitting is often simpler than grid-tied solar. Requirements still vary by location, especially for roof-mounted arrays or permanent electrical work, so check with your local building department before installing. Plenty of our customers install these themselves. You'll want real electrical experience before wiring a 48V battery bank and 240V circuits.
Wire all eight panels as a single series string on one MPPT tracker. This is the detail people get wrong on this inverter. The SPH6548P's trackers don't start working until 150VDC, and eight of these panels in series sit at roughly 280V, comfortably inside the 150 to 450V window. Splitting them four and four across the two trackers puts each string near 140V, below the floor, and neither tracker will harvest. Leave the second tracker empty until you add panels: any future string needs at least five of these panels to clear 150V.
All three of these run 240V equipment. What separates them is how much array comes with the inverter, and how much you can run at once.
| Kit | What changes | Who it's for |
| SGM-655M. 6.5kW, 2.22kW solar, 5.12 to 10.24kWh, 120/240V | Same inverter, but 2,220W of panels instead of 3,600W, and wall-mount batteries that need no rack. | Sites where 240V is occasional and the install footprint matters more than generation. |
| This kit. 6.5kW, 3.6kW solar, 10.24kWh, 120/240V | The same split-phase inverter with an array big enough to run 240V equipment regularly rather than occasionally. | Small off-grid homes on a well, workshops, and full-time 240V living. |
| SGR-8K10E. 8kW, 3.6kW solar, 10.24kWh, 120/240V | Same array and same storage, with 1,500W more continuous output and 16,000W of surge. | Anyone who needs more than one large 240V load running at the same time. |
Before you order, it's worth a short call. Our sales engineers will size the kit against your actual loads, tell you honestly whether 6,500W covers the 240V equipment you plan to run at once, and put together the list of site-specific parts your install will need. Call 877-556-3347.
Warranty claims are handled through Off-Grid Source. Send us photos and order details, and we take it from there.
| Component | Coverage |
| Inverter | 3 years |
| Batteries | 10 years |
| Solar panels | 30 year linear performance, 12 year product |
| Specification | Details |
| Max Continuous Output | 6500W |
| Peak Output | 13,000VA |
| AC Output | 120/240VAC split phase |
| DC Voltage | 48V |
| Max Solar Input | 5000W + 5000W (10,000W total, two trackers) |
| Total Watt of Panels | 3600W |
| Per Panel Watt | 450 Watt Bifacial N-Type |
| Panel NO | 8 pcs |
| Total KWH of Batteries | 10.24KWH |
| Usable Energy Delivered to AC Loads | approx. 8.7KWH |
| Chemistry | LiFePO4 Lithium |
| Battery NO | 2 pcs |
| Battery Spec | 48V 100AH Server Rack |
| Specification | Details |
| AC Output | 6.5KW with Parallel Function |
| Peak Output | 13,000VA |
| Output Waveform | Pure Sine Wave |
| Output Voltage | 120/240VAC (split phase / single phase) |
| MPPT Trackers | 2 independent |
| Maximum PV Array Power | 5000W + 5000W |
| Max PV Open Circuit Voltage | 550VDC per tracker |
| MPPT Operating Range | 150 to 450VDC |
| Max Solar Charging Current | 18A per tracker |
| Efficiency | 93% |
| MPPT Tracking Efficiency | 99.9% |
| Max AC Charging Current | 80A |
| Max Total Charging Current | 140A |
| Parallel Function | Up to 6 units |
| Dimension | 23.0 × 16.2 × 5.3 inches |
| Weight | 42LB |
| Warranty | 3 Years |
| Specification | Details |
| Nominal Voltage | 51.2V |
| Nominal Capacity | 100AH |
| Energy | 5.12KWH per unit, 10.24KWH total |
| Charge Cut-off Current | 5A |
| MAX Continuous Charge Current | 100A |
| Discharge Cut-off Voltage | 43.2V |
| Cycle Life | 7,000+ cycles |
| Communication Protocol | RS232/RS485/CAN Support multiple protocols |
| Storage Temperature | 14°F to 113°F |
| Dimension | 19.3 × 18.9 × 5.5 inches |
| Weight | 93 lbs each |
| Warranty | 10 Years |
| Specification | Details |
| Peak Power | 450W front side |
| Peak Power with Rear Gain | up to 499W at 13.5% rear irradiance |
| Solar Cell | N-Type Monocrystalline, Bifacial Dual Glass, 96 cells |
| Module Efficiency | 22.5% |
| Bifaciality | 80% ±10% |
| Power Tolerance | 0 to +5W |
| Maximum Power Current (IMP) | 14.97A |
| Maximum Power Voltage (VMP) | 30.08V |
| Short Circuit Current (ISC) | 16.05A |
| Open Circuit Voltage (VOC) | 35.03V |
| Temperature Coefficient of Pmax | -0.29%/K |
| Max System Voltage | 1500VDC |
| Front Glass | 2.0mm with anti-reflective coating |
| Back Glass | 2.0mm heat strengthened |
| Static Load | 5,400Pa front, 2,400Pa rear |
| Junction Box | IP68, 3 diodes, MC4 compatible |
| Product Dimension | 69.4 × 44.7 × 1.4 inch |
| Product Weight | 53.4 lbs |
| Certifications | UL61730 certified by ETL, CEC listed |
| Warranty | 30 Year Linear Performance, 12 Year Product |
Does this kit include everything I need to install it?
It includes the major system components: the inverter, both batteries, all eight panels, the DC and PV breakers, solar extension cables, the 2/0 AWG battery cables, Z-brackets, and the manuals. What varies is the mounting and building side of the job, and that's site by site. Depending on your site that typically means a rack or cabinet for the batteries, rail racking if you're mounting on a shingle roof or the ground, conduit, junction boxes, building wire, a critical loads panel or transfer switch, generator or shore power input wiring, and labor. Those depend on your structure and your local code, which is why we spec them per site rather than boxing a set that might not fit. Tell us about your install and we'll list exactly what yours needs.
How should the panels be wired?
All eight in one series string, on one of the two MPPT trackers. The trackers need 150VDC before they start working, and eight of these panels in series sit near 280V. Four and four across both trackers lands each string near 140V, below the floor, and neither tracker will harvest. Any string you add later needs at least five of these panels for the same reason.
Can this run my well pump?
Yes. A 1HP pump draws roughly 1,200W running, and 13,000VA of peak capacity covers the startup surge. That's about 7 hours of continuous running from a full battery, which is far more than a pump actually runs in a day.
Can it run central AC?
It will start and run a 2-ton unit. From storage alone that's about 2 hours, and the array generates enough on a good day to run it through the afternoon. What it won't do is run air conditioning and an electric water heater at the same time, because together they exceed 6,500W.
How is this different from the SGM-655M?
Same 6,500W split-phase inverter. This kit carries 3,600W of bifacial panels against 2,220W there, and uses server-rack batteries rather than wall-mount units. If 240V equipment is part of your daily routine rather than an occasional event, the larger array is the reason to be here.
How much energy will this generate daily?
The 3.6kW array produces roughly 14 to 18kWh per day at 4 to 5 peak sun hours, and more where the rear face picks up reflected light. Actual output depends on your location, season, panel angle, and shading.
Can I add panels or batteries later?
Yes. The inverter takes 10,000W of PV against the 3,600W included, and the second MPPT tracker is sitting empty and ready for a new string of five or more panels. Battery capacity expands by adding SG48100P units alongside the first two.
Can I install this myself?
Many customers do. The line worth drawing is where the system meets your building: setting the inverter, running PV, and wiring the battery bank are within reach for someone with real electrical experience, while tying into an existing house panel is work for a licensed electrician.
Is LiFePO4 safe?
It's the safest widely available lithium chemistry, with strong thermal stability, long service life, and minimal maintenance. Both batteries include BMS protection against overcharge, deep discharge, and short circuit.
Shipping is free across the Lower 48. No fuel surcharges, no residential fees, and no liftgate charge on freight orders. The price you see is the price you pay. Read our full Shipping Policy here.
Most orders leave the warehouse in 1 to 2 business days and arrive within 3 to 10 business days. We send tracking the moment it ships.
Anything that ships on a pallet goes freight with liftgate and pallet jack included, so the driver gets it off the truck and onto the ground at your address. The carrier will call you directly to schedule a delivery window.
Returns are 30 days from delivery. For freight deliveries, inspect the shipment before you sign for it. If something is damaged in transit, note it on the delivery receipt and we handle the freight claim, not you. Read more about our Returns Policy here.
Buying solar online should not mean guessing your way through the install. Here’s what you get with Off-Grid Source.
Absolutely zero issues. Delivery went perfect, kind of a tricky one. Installed it myself. System is working perfectly. Charging up on cloudy, even rainy days. I did not expect that. Performing beyond my expectations!
Also when I needed a few questions answered before the kit arrived I was acknowledged and responded to within an hour or two. Perty happy with y’all. Thanks OGS
You May Also Like
Trusted By 10,000+ Customers. See All Reviews.
I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!
Bruce D.
I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.
Jennene A.
I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.
Ray B.
I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!
Roger V.
I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.
Jeff S.
We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!
Jason
Very fast response times. Very professional. I highly recommend!
Ray W.
Get Off-Grid Tips, Deals & System Guides, Straight to Your Inbox. Plus, Unlock a Mystery Discount On Your First Order.
Sign up for emails and get exclusive offers, new product drops, and expert advice to help you build the right solar setup with confidence.
Added to your cart:
placeholder