Frequently Asked Questions

VoltEdge Pro is a bidirectional EV charging system that enables both charging your vehicle from the grid and discharging stored battery energy back to power your home. The key difference from most bidirectional systems is that VoltEdge leverages the AC-to-AC pathway via your EV's existing V2L (Vehicle-to-Load) capability, rather than requiring expensive DC conversion equipment.

In practical terms: one connection, two functions. When grid power is available, it charges your EV. During outages or peak pricing periods, it can reverse the flow and use your EV battery as backup power or load shifting.

Most bidirectional chargers are DC-coupled—they tap directly into the vehicle's DC battery, which requires a big bidirectional inverter for AC-DC conversion. Wallbox Quasar 2 ($6,440+), Sigenergy SigenStor ($3,700+), Enphase's upcoming model ($4,000-$5,000).

VoltEdge is AC-coupled. We use the EV's onboard V2L inverter instead of adding an external one. Architecture-wise, that means we're providing control and switching electronics while DC systems need the whole high-power inverter stack. Installation is standard Level 2 EVSE work for us, DC systems need DC-rated components and more complex permitting. Vehicle compatibility: any V2L-enabled EV works with VoltEdge, DC systems need CCS/CHAdeMO bidirectional support (limited models).

Tradeoff: DC systems can push 11-25kW discharge, we're limited to the EV's V2L output (3.6-7.2kW). For most residential backup and load-shifting, V2L rates work fine.

Bidirectional just means power can flow both ways. Normally your EV charger only pushes electricity into your car (Grid-to-Vehicle). With bidirectional capability, you can also pull power out of your car's battery to run your home (Vehicle-to-Home) or even send it back to the grid (Vehicle-to-Grid, though that requires utility approval).

An EV battery stores 50-100 kWh typically. Average home uses around 30 kWh/day, so there's enough capacity there to run essential loads during outages if you manage it carefully.

DC bidirectional chargers currently run $3,700-$6,500+ for the hardware. Sigenergy SigenStor is around $3,700 but needs a separate inverter. Wallbox Quasar 2 is $6,440. Enphase's upcoming unit is estimated at $4,000-$5,000. Installation adds another $1,500-$3,000 on top.

VoltEdge costs less because we're not including a high-power bidirectional inverter—your EV already has one for V2L. We're basically providing the control electronics and transfer switching. Contact us for specific pricing, but expect significantly less than those DC systems.

Depends entirely on your rate structure. If you've got time-of-use pricing with big peak/off-peak spreads (like 3-5x difference), you might save $200-600 annually by shifting 10-15 kWh per day from your EV battery to cover expensive evening hours.

With solar and crappy feed-in tariffs, there's value in storing excess production in your EV instead of selling it back to the utility for pennies. Commercial applications with demand charges can see more significant savings.

Some early V2G programs (PG&E, Vermont utilities) have paid $400-1,200/year, but that's not widely available yet. For most people, realistically expect $300-800 annually. Honestly, the backup power capability is usually the bigger draw than daily arbitrage.

Yeah, should be cheaper. It's standard Level 2 EVSE work (240V, 40-50A circuit) plus transfer switching similar to generator installations. No high-voltage DC certification needed—most electricians can handle this without special training.

Expect $800-$1,500 for straightforward installs. DC systems run $2,000-$3,500+ due to added complexity and permitting hassles.

You need a V2L-capable EV. V2L (Vehicle-to-Load) is the AC output feature built into some EVs, usually delivering 3.6-7.2kW through the charge port.

Current models with V2L: Hyundai Ioniq 5/6, Kia EV6/EV9, Genesis GV60/GV70, Ford F-150 Lightning (9.6kW), BYD Atto 3/Seal, Nissan Ariya in some markets.

Important: V2L is different from DC bidirectional. Some EVs have V2L but can't do bidirectional DC charging through CCS/CHAdeMO. VoltEdge works with the V2L feature specifically. Check your vehicle specs or ask us about your specific model.

Dedicated 240V circuit, 40-50A typically. Same as any Level 2 charger. You'll need a 200A service panel with spare capacity, mounting spot near where you park, and transfer switching to route power between grid and vehicle.

For whole-home backup you need integration with your main panel via transfer switch. For critical loads only, a dedicated subpanel works. It's basically a Level 2 charger plus generator transfer switch setup—no DC-rated gear or specialized inverters needed, which simplifies permitting.

Yes. VoltEdge works alongside solar—monitors grid conditions and can coordinate with solar production. Charge your EV during excess solar, use that stored energy during expensive evening peaks, and you've got backup capability if the grid goes down (solar can recharge the EV during extended outages).

Integration depends on your existing solar setup. VoltEdge works standalone or can integrate with energy management systems via APIs where available. The combination really shines if you have time-of-use rates—capture cheap midday solar in your EV, discharge it during expensive evening hours.

Depends on what you're running and how much battery you're willing to use. If you're pulling 3-5 kW for essentials (fridge, lights, internet, some HVAC), a 70 kWh battery with 50% available gives you maybe 7-12 hours. Light loads (1-2 kW) stretch that to 17-35 hours. Heavy loads like central AC or electric heat drain it fast.

Example: Ioniq 5 with 77.4 kWh. Reserve 40% for driving (31 kWh), use the remaining 46 kWh at 4 kW average load—that's about 11 hours. Multi-day outages need careful management or solar recharging.

Think of V2H as bridging short outages (hours to maybe 1-2 days) rather than week-long events, unless you've got solar or can drastically cut consumption.

EV batteries degrade based on cycle count and depth of discharge. V2H adds cycles beyond normal driving, so yes, there's some additional wear.

Modern EV batteries handle 1,000-2,000 full cycles before hitting 70-80% capacity (8yr/100k-150k mile warranties). Daily arbitrage cycling 10 kWh adds about 49 equivalent cycles per year on a 75 kWh pack. Occasional backup use a few times annually? Negligible impact.

Reality check: daily arbitrage will age your battery a bit faster. Occasional backup plus weekly peak shaving is pretty minor. Most EV batteries outlast the vehicle anyway. VoltEdge lets you set discharge limits if you want to be conservative.

Up to 11.5 kW (240V, 48A) Level 2 charging. Actual speed depends on your vehicle's onboard charger—7.2 kW vehicles get about 30 miles/hour, 11 kW vehicles around 40-45 miles/hour. Figure 6-9 hours for 0-80% on a typical 65 kWh battery.

Standard Level 2 performance. Overnight charging handles typical daily driving (30-50 miles) easily. The bidirectional capability is the value-add here.

Standard EVSE safety features: overcurrent protection, GFCI, temperature monitoring, J1772 pilot signal. Plus anti-islanding protection to prevent backfeeding the grid during outages.

Designed for NEC Article 625 (EVSE) and 702 (Optional Standby Systems) compliance. Needs proper installation by a licensed electrician. We're working on UL and other certifications for North American markets.

Varies by region. Australia's AS/NZS 4777.2 (2020/2024) now covers bidirectional systems—DC V2G chargers are getting CEC certified. In the US, there's no federal ban on V2H. V2G needs utility interconnection agreements. California and Vermont have active V2G pilots. Europe's pushing V2X but implementation varies—Germany, UK, Netherlands are ahead.

Important: V2H (backup, islanded) usually just needs standard permits. V2G (grid export) needs utility approval. VoltEdge works in V2H mode regardless of V2G policy.

Highly variable. V2H (no grid export) generally doesn't need utility permission—works like a backup generator with anti-islanding protection. V2G (grid export) needs an interconnection agreement. Some utilities have programs (PG&E, Green Mountain Power), others don't have procedures yet.

Time-of-use optimization doesn't need special permission—you're just controlling when you draw from grid vs EV. Check your utility's DER policies or EV programs. We can help with interconnection if you want V2G.

Depends on site conditions. Simple installs take 4-6 hours. Complex ones with panel upgrades or trenching can take a full day or more. Permitting adds 1-4 weeks depending on your local authority.

It's basically Level 2 EVSE plus generator transfer switch work. Most time goes into panel and transfer switch setup, not the VoltEdge unit itself.

Standard J1772 (North America) or Type 2 (Europe) connection. For V2L discharge it depends on your vehicle—Hyundai/Kia E-GMP platform vehicles use the charge port (VoltEdge activates V2L via pilot signaling). Some BYD models have a separate V2L outlet and may need an adapter.

No DC cabling or high-voltage connections. We'll confirm specific requirements for your vehicle during consultation.

Yes. WiFi/Bluetooth for mobile app and web portal. Monitor charge/discharge status, schedule cycles, set discharge limits, view historical data, get alerts for outages or events. OTA firmware updates. Manual override to start/stop cycles remotely.

Depends on your needs. VoltEdge costs less (no bidirectional inverter), simpler install (standard Level 2 + transfer switch), works with any V2L EV (growing segment), uses the vehicle's existing inverter.

DC systems give you more discharge power (11-25kW vs 3.6-7.2kW), can run heavier loads, and some V2G programs specifically want DC capability.

For most residential stuff—essential loads backup, peak shaving, solar optimization—V2L rates are fine. If you need to run your whole house including central AC and electric heat during outages, DC's higher output might justify the extra cost.

It'll work as a standard Level 2 charger. Bidirectional features activate when you get a V2L vehicle.

If you're buying an EV soon and want V2H/V2G eventually, installing VoltEdge now avoids a second installation. But if you're unsure or don't care about bidirectional, a regular Level 2 charger costs less upfront.

V2L is getting more common—Hyundai/Kia, Ford, Chinese manufacturers are adding it. If your next EV will likely have V2L, VoltEdge gives you that capability without later upgrades.

ROI varies a lot. Best case: high TOU rate spreads (3-5x), frequent outages, solar with bad export rates, or V2G programs. Then you're looking at maybe 5-8 year payback. Flat-rate power and reliable grid? Financial case is weak—you're mainly paying for backup security, not arbitrage.

Consider it if you value backup resilience, have big TOU spreads, frequent outages, or want to maximize solar. Being 40-60% cheaper than DC systems helps the math versus other bidirectional options.

Skip it if you've got flat rates, rare outages, no solar, and no interest in V2G. Regular Level 2 charger costs less and handles basic charging fine.