Father's Day Deals at Signature Solar 2026 — Batteries, Inverters & Panels on Sale
Father's Day is Sunday, June 21st, and Signature Solar has some of the best solar deals I've seen all summer running right now. I dug through the promotions page myself and pulled out every verified deal — batteries at 10% off, EG4 inverters discounted, panels under $155, and the Wiren U5 back in stock at $999. Here's everything worth knowing.
I've been a Signature Solar customer and brand ambassador for years. I've visited their warehouse in Sulphur Springs, Texas in person, and I run three EG4 systems on my one-acre homestead in Porter, Texas. When I say these are good deals, I mean it — and I ordered five Wiren U5 batteries just this week with my own money to prove it.
Want to skip ahead? All current deals are on the Signature Solar promotions page. Your $50 affiliate discount applies automatically through my link.
See All Signature Solar Deals →10% Off Battery Blowout Sale
The biggest deal on the page right now is the Battery Blowout Sale — 10% off select batteries, applied automatically when you add to cart. No promo code needed. Combined with free shipping on orders over $3,000, this stacks into serious savings on larger battery purchases.
| Battery | Sale Price | Savings |
|---|---|---|
| EG4 Indoor WallMount Battery | 48V 314Ah | 16kWh | $3,399.99was $3,727.99 | Save $328 |
| EG4 WallMount All Weather | 48V 280Ah | 14.3kWh | $3,124.99was $3,499.00 | Save $374 |
| EG4 LifePower4 V2 | 48V 100Ah | Server Rack | $1,349.99 | Blowout Price |
| LG 16H Prime Battery | 16kWh | 400V High Voltage | $2,750.00was $7,500.00 | Save $4,750 |
Important: The Battery Blowout discount applies automatically at checkout — no coupon code needed. Just add to cart and the price adjusts. Free shipping kicks in automatically on qualifying orders of $3,000 or more.
Shop the full Battery Blowout Sale at Signature Solar.
Shop Battery Blowout →EG4 Inverters on Sale for Father's Day Weekend
Several EG4 inverters are discounted right now, including the 12000XP — the same inverter powering my main house here on the homestead. This is a big deal. The 12000XP rarely goes on sale this deep.
| Inverter | Sale Price | Savings |
|---|---|---|
| EG4 | 12000XP Off-Grid Inverter | V2 | NON-FEOC | $1,899.99was $2,589.29 | Save $689 |
| EG4 | 6000XP Off-Grid Inverter | $1,629.99 | On Sale |
| EG4 FlexBOSS21 | 16kW AC Hybrid Inverter | $3,629.90was $4,199.00 | Save $569 |
I run the EG4 12000XP on my main house and the EG4 6000XP on my shed-to-house conversion that's been 100% off-grid since April 2024. Both are rock-solid. If you're building a serious off-grid or hybrid system, either one is a legitimate centerpiece.
Shop EG4 inverters and all current deals at Signature Solar.
Shop EG4 Inverter Deals →Best Value Pick: Wiren U5 Server Rack Battery at $999
If you're looking for the best bang-for-buck battery on the market right now, it's the Wiren U5. We just ordered five of them for our homestead studio and network center build, pairing them with our EG4 3000EHV-48 inverter. At $999 for a 48V 100Ah LiFePO4 server rack battery with 6,000 cycles and 99% round-trip efficiency, nothing comes close at this price.
| Product | Price | Specs |
|---|---|---|
| Wiren | Server Rack Battery | 48V 100Ah | U5 | $999.00 | 5.12kWh | 6,000 cycles | Smart BMS |
| Wiren | 6-Slot Battery Rack (Unassembled) | See site | Holds up to 6 U5 batteries |
Our setup: 5x Wiren U5 = 25.6kWh total storage, paired with the EG4 3000EHV-48. Full install documentation coming to the Off Grid Solar Living YouTube channel.
Grab the Wiren U5 while it's in stock — it sold out fast last time.
Shop the Wiren U5 at $999 →Solar Panels Under $155 at Signature Solar
Panel prices are solid right now too. If you've been planning a ground mount expansion or adding capacity, here's what's available:
| Panel | Price | Notes |
|---|---|---|
| Prism Solar 445W Monofacial Panel | $151.30 | Lowest price on the page |
| Peimar 450W Mono PERC Solar Panel | $153.00was $157.50 | Quality PERC panel, on sale |
| ZnShine 440W Bifacial Solar Panel | $154.00was $167.20 | Bifacial for ground mounts |
| Aptos 460W Monofacial Solar Panel | $188.60 | Higher wattage per panel |
Free Shipping on Orders $3,000+
Signature Solar is offering free shipping on qualifying orders of $3,000 or more — no code required, applies automatically at checkout. This is a standing promotion, not a flash deal, but it's worth knowing if you're putting together a larger order this weekend. Solar panel pallets and large module panels are excluded, but batteries, inverters, and most other products qualify.
How to Get the Best Price at Signature Solar
Here's the simple play to maximize your savings this Father's Day weekend:
1. Click my affiliate link — your $50 discount applies automatically on qualifying orders at checkout. No code needed.
2. Add Battery Blowout items to cart — the 10% discount appears automatically.
3. Hit $3,000 to trigger free shipping on qualifying products.
4. These deals are time-limited — Signature Solar reserves the right to end promotions at any time.
All current Signature Solar deals in one place. Your $50 discount applies automatically through this link.
See All Father's Day Deals at Signature Solar →Disclosure: This post contains affiliate links to Signature Solar. If you purchase through these links, Off Grid Solar Living earns a commission at no additional cost to you. Richard Jeremiah is a Signature Solar Brand Ambassador. All prices verified as of June 16, 2026 and subject to change.